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Flushing & Replacing Engine Coolant in a BMW/MINI

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BLOG ARTICLE: http://blog.bavauto.com/12402 "Like" us on Facebook - http://www.facebook.com/BavarianAutosport "Follow" us on Twitter - http://www.twitter.com/BavAuto "Subscribe" to us on YouTube - http://www.youtube.com/BavarianAuto Visit our online store - http://www.bavauto.com/ All of the items shown in these videos are available in our online store at http://www.bavauto.com/. Need additional tech help? Please visit our tech blog for thousands of Tech and DIY BMW and MINI articles at: http://blog.bavauto.com/ --- Parts Used: BMW Coolant:https://www.bavauto.com/82-14-1-467-704 Distilled water (local grocery store) Tools Used: Metric Socket Set; https://www.bavauto.com/cta10100 Form-a-Funnel: No Longer Available Spill-Free Coolant Funnel: https://www.bavauto.com/b8800082 Garage Guard Absorbent Mat: https://www.bavauto.com/catalogsearch/result/?q=garage+guard Coolant Drain Pan (New Improved Black pan): https://www.bavauto.com/b8800011 6mm flexible hose clamp driver: https://www.bavauto.com/b8800073 Bentley repair manuals: https://www.bavauto.com/tools-manuals/manuals.html?brand=3862 Floor jack and jack-stands, ramps or vehicle lift Metric combination wrench set (8mm through 17mm) Flat head screwdrivers Phillips head screwdrivers ----------------- The coolant flush is not especially difficult, but it does require more than simply removing the radiator drain plug. In this video we will demonstrate a coolant flush and change on a typical BMW with a later model 6-cylinder engine. The procedures shown can be applied to most BMW and MINI models. In our example (2002 E53 X5 3.0i), we'll show the specific steps to properly drain and flush the system, then fill and bleed with new 50/50 mix of distilled water and coolant. Watch the video and see the parts and tools used, below. For further assistance, please contact our agents at 800-535-2002 or visit our online store at bavauto.com. The Bentley repair manuals will cover model specific points, torque values and fill quantities. This DIY will assume that the DIYer has the applicable Bentley manual for additional references. Our BMW and MINI cooling systems have the thankless task of dissipating the heat generated by our engines (and automatic transmissions), keeping them at an optimal operating temperature; not too hot, not too cool. In addition, the cooling system must keep corrosion and sediment from attacking the metal, plastic and rubber parts of the systems. Like the engine's lubrication system (oiling), the cooling system must function mile after mile and hour after hour for hundreds of thousands of miles and thousands of hours. Faults within either of these systems will typically result in catastrophic failure and potentially terminal engine damage. With these thoughts in mind, we can begin to understand why regular maintenance of the engine's cooling system is just as (or more) important as the other regular maintenance tasks that we perform on our BMWs and MINIs. We recommend a coolant flush every two to three years if using the BMW/MINI coolant and distilled water (more often if other coolant or "tap" water is used). While the base Ethylene Glycol (EG) Antifreeze/Coolant (basically) holds its antifreeze properties for a very long time, the additives for corrosion protection, lubrication, etc, do not. The recommended 2-year interval is due to the Silicate anti-corrosion additives that are "used up" and begin to drop out of solution after about two years of service. When this happens, silicate build-up can happen within the radiator, heater core and engine passages. When adding coolant, between flushes, always add the same coolant as the original fill. While adding a common green, orange, yellow or other, coolant (which have differing additive packages and base pH) will not immediately destroy your engine or cooling system, it will reduce the effectiveness of both the base and the added coolants. This will, at least, greatly reduce the service life or, at worst, start a corrosive cycle. We mix the coolant with the distilled water in a 50/50 ratio. Using distilled water for your 50/50 mix is not specifically required, but in doing so, your coolant mixture will be much more stable and far less corrosive in the long term. This is due to the absence of the minerals and impurities that are removed in the distillation process. These impurities encourage electrolytic corrosion to the engine block, cylinder head, hoses and gaskets, damaging these parts and causing failures and need for repairs. -------- All products noted in this video can be purchased in our online store, http://www.bavauto.com/, 24 hours a day, 7 days a week. You are also welcome to e-mail us at info@bavauto.com or call into our headquarters and speak to our knowledgeable advisors at (800) 535-2002 (Mon.-Thurs. 8AM to 9PM EST, Fri. 8AM to 7PM EST, and Sat. 9AM to 4PM EST).
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Текстовые комментарии (238)
Khai Nguyen (14 дней назад)
I need this video with how to replace BMW X3 2005 radiator Thank you
John Faire (24 дня назад)
Thanks Auto! Great video. But, since the spill proof kit uses a funnel that is open to outside air, wouldn't the cooling system bleed air to the outside through funnel opening? Is it even necessary to use the bleeder screw?
Andy Florian-Escarate (1 месяц назад)
I have a 2009 BWM X5, would you know where can I get a Repair Manual?
s d (1 месяц назад)
Nice work!!!
r2b274 (1 месяц назад)
Good job.  Please perform same on a N52  engine or the one that has electric pump.   The bleeding process is much different and perhaps  my next coolant flush will not be as challenging.
N Ver (3 месяца назад)
euh G12 is recommended by BMW in Germany...i bring my Beemer to a german dealer..hakvoort in Munster Germany..Google it
Pablo Aparcana (3 месяца назад)
What happened if you don't drain the block.
Bahar Kabul (4 месяца назад)
Hi Bavarian, My engine is E87 BMW 118d, 2008. What happen if I not over filling like you and not use the special funnel and adapter. Just filling to max level and ventilate by start the engine, heating system to max and fan to min and fill more ... ??? Grateful for feedback.
tropikiimba (5 месяцев назад)
I couldn't find the block drain bolt. I have a 2008 BMW x 3 si N 52 engine. Can you tell me where it would be? Thanks
cheshire smile (5 месяцев назад)
Thanks fellas
Jody Jody (5 месяцев назад)
Can you post pic of the exact amount of distilled water equalling 5 quarts along with the exact same thing for the BMW blue coolant...I got the full gallon in initially, I'm not certain upon second gallon amount to equal 5 quarts coolant. Thank you Ty
Jody Jody (5 месяцев назад)
I have changed the thermostat which was stuck in the open position. I have bought the recommend BMW type coolant blue in color. And it's draining into vehicle. This is my second time putting coolant in. I see that you suggested 5 quarts straight BMW coolant..then put 5 quarts of distilled water. So maybe that's why I'm having this problem...I will adjust and get back to you. Now the first four I put in vehicle were of a 50/50 mixture. Half water into a clean coolant container with the rest being half of BMW coolant.
Eric sin (6 месяцев назад)
GOD damn block drain plug is in like gorilla put it in
James O'Gara (6 месяцев назад)
Terrific -- perfect for my 335d which has a mechanical pump.
Simon Joshua (7 месяцев назад)
Hi. Great videos and learned a lot. I think someone commented already but this is important. The expansion tank does NOT get filled right up. Always remove coolant once done bleeding to right level. That's the indicator just to top of bottle. Use a pipe or turkey baster to remove coolant. Then check after driving a few times.
John Faire (24 дня назад)
Simon Joshua Agreed. It's good practice, and safer.
Luca Natoli (8 месяцев назад)
Old video i know, but my BMW does not have a engine temperature gauge. This video is very useful, except i can't tell if my BMW is warmed up due to no temp gauge lol.
Fabian Dee (9 месяцев назад)
look at that air intake!
Da Maestro (10 месяцев назад)
at 12:25 , do I really need to fill the system that full ??
jongkeun lee (10 месяцев назад)
Hi Otto. In case of e46, do we need to empty the expansion tank coolant ? If yes, How? remove and empty it or suck it up with pump? thanks
Corvette Garage (11 месяцев назад)
Excellent videos. Although I've never owned or worked on German cars, this will definitely help out when I pick up my E90 330i. Thank you.
Rebecca Lucas (1 год назад)
I just wanted to know where the radiator is located , why can't someone post a video explaining where it's at ???
Fawaz ALDHAFERI (1 год назад)
we need video with new engines like N52 with electric water pumps
ELI (1 год назад)
thanks Otto. very informative. very precise in the details.
JDMTuna (1 год назад)
Had no idea there existed a Form-a-Funnel. I will purchase one immediately. Thank you.
SL (1 год назад)
Im need to get the air out now instead of just dumping it in.
Adrian Edhouse (1 год назад)
HI, sorry if this has already been asked, but did that Spill Free funnel come with the correct attachment for the BMW or did you need to adapt/source a part somewhere? I'm based in New Zealand and looking to purchase via Amazon so don't want to get something shipped all the way here just to find I can't fit it to my 2005 318i (with the N46 engine). Cheers.
Richard Orosco (1 год назад)
Why do you have to bleed the engine or the coolant .?
copperlocks1 (1 год назад)
Air that remains can cause hot overheating symptoms ..and localized internal corrosion issues where the pocket forms
Darrell Hazy (1 год назад)
Where can I get a repair manual for a 2002 BMW 325ci  Thank you
Noel Gonzalez (1 год назад)
doing it now wish me luck if i cant get a hold of bmw coolant what would be another certified coolant i could use?
Scot Cook (1 год назад)
Thanks for all the vids. I have a clicking sound every 10 -20 seconds as the car idles at temperature. Could this be the thermostat opening and closing ? M54 with 38K miles. Would this indicate an issue with the Thermostat if I am correct? Thanks for your reply
Mal P (1 год назад)
ook, alil advice if possible I've a 4 cylinder e46 2004, I've just replaced the radiator, thermostat & water pump... I've noticed a small leak near a thermostat bolt, everything else seems OK regarding leaks anyway now I've noticed when I've the Heater turned on the engine temp drops, when the heater is off the engine temp is normal... any ideas?? could it be trapped air in the system still or possible something else???
Deltanova93 (1 год назад)
Hi BavAuto, nice video. I have a question though. You also have a drain plug on the engine block. How man Liter coolant is storaged in there? And does that drain plug have a specific "pattern". How is it recognizable? Is it highly recommended to open that plug as well? Or will the drain plug on the radiator do? Thanks in advance
AndersDog94 (1 год назад)
what the different's between the BLUE and GREEN bmw Coolant??
martinez221704 (1 год назад)
AndersDog94 it was blue but because he pours it into the yellow bucket it looks green.
ThePariss333 (1 год назад)
Why my Manual i Recommend not to use those Radiator cleaner ? Its ok to use it ?
DashSVK (1 год назад)
I'm having trouble bleeding air from the cooling system on my M43TU engine after replacing one flange. Instead of releasing bubbles like usually (like in 12:27) it spits out gradually over a liter of coolant while making loud noises. After about 15 minutes of spitting coolant the engine overheats. I tried it twice with the same result. What could be the cause of this behavior and how do I solve this issue?
Joel Back (1 год назад)
I don't remember him mentioning the heating system. It's best to turn that to high inside the car with the fan off or at least on low to make sure the heater core is also getting flushed, full and burped of air.
The Meza Family (1 год назад)
I recently added coolant to my BMW X5 and the very next day I had to add more. I thought it might have been a leak, but there is no evidence of that. I added more today and waited to see if the coolant went down, it did so I kept adding more. My question is can it be leaking from somewhere else?
NoExpert (1 год назад)
Your head gasket could be damaged and because of that your engine is burning the coolant.
Ghost (1 год назад)
how's that afe intake? i see they make 2 different one's but a huge price difference between them
MrKingDelight (1 год назад)
Great video! I was not able to add more than 5 liters (5.2 Quarts) after the flush before the system was full on the M54 engine which should take 8.4 liters. First I did this with DEMINERALIZED water, only 5L could go in. Then drained, then again with water and then with the coolant (Croon SP11 already mixed coolant). The car was level on a car lift. Two questions: 1. Is is possible that there was still 3 liters left in the car? 2. Is it an issue that there are probably remains (3 liters) of the DEMINERALIZED water in the system?
Joe Jones (1 год назад)
hey i have replaced , the water pump, thermostat, thermostat sensor , radiator and fan clutch. and i have bled my car out multiple times. i can drive for about 10 minutes and my car starts overheating slowly . i go to check my car engine it is still fine, what could be my problem????? could you please help
ReMark (1 год назад)
air in the system. bleed through bleeder valve near thermostat then through bleeder valve near expansion tank.
The Artful Dodger (1 год назад)
Did you figure it out yet?
Lei Cai (1 год назад)
is it a good idea to use a bottle of flush and cleaner for the job?
Steve from Austin (1 год назад)
this guide has absolutely nothing to do with a mini. keep looking
ZohanLohan (1 год назад)
mini is only MADE BY BMW
JAMAEL89 (1 год назад)
Thank you again. Give me the courage to do this on my own. Saved money and time.
Vdiddy (1 год назад)
is it me or does it look super full to me? or is it supposed to be that full?
sidiki ouedraogo (1 год назад)
Bavarian Autosport
Bavarian Autosport (1 год назад)
If you fill to (or near) the top, as the fluid heats and expands, the excess will vent through the cap, while running/driving.
Jamal Al Al Galaa (1 год назад)
thank you
M J Kay (1 год назад)
if i had blocks i could do it! and im not used to this, got one on mini air conditioning and radios?
Justin Moore (2 года назад)
why are german vehicles so difficult to maintain...most power steering pumps you will hear loud noise from the steering gear if you run out of fluid, on a bmw the whole unit melts and causes damage to the ac clutch as well...i've never even heard of having to bleed coolant from a vehicle, you usually just fill it up and that's it.
Felix Del Rio (1 год назад)
Justin Moore
DrE38 (1 год назад)
lol why wouldn't you bleed air out of any other vehicle? That's how ALL systems work.
Oliva Fultz (2 года назад)
thanks otto i can always count on you
ilirjan doda (2 года назад)
hi im losing coolant from the bottom of the radiator,exactly were the blue screw is but is not the screw that's broken its the part were the screw fits its loose any help please thx
ROהԺ (2 года назад)
radiator it self?
Desertduck (2 года назад)
Great video. thank you
Kevin Kroeger (2 года назад)
Does BavAuto recommend a specific vendor for underbody/under engine splash shields. I have a 1998 328i that came with a missing section, directly under the engine. Just recently, the narrow shield that protects the serpentine and lower radiator fell off somewhere...so I'd like to replace these. Especially with winter around the corner. Thanks!
Jason Lee (2 года назад)
+Kevin Kroeger OEM for life
Felix Kolapo (2 года назад)
Thanks for the video. Where is the bleeder for 2002 318i (e46) located. I will like to carry out this operation myself. Thanks
Bigbore400cc (2 года назад)
Once finished and radiator cap back on...if there's any more air in the system will it find it's out by itself through regular driving...or is it sealed in there ?
moe embabi (2 года назад)
Great video thanks, do you sell just the cap adaptor for the funnel ? I own the funnel and an adaptor for Nissan but need a BMW adaptor now  You are the only one actually running the car to bleed which is the right way to do this
desertsonne (2 года назад)
This is a great clear explained video and easy for us "non mechanics"
Angel sanchez (1 год назад)
desertsonne
Frank J (3 года назад)
Thanks Otto for an excellent demo.  The question about the engine block drain plug has been asked many times.  It is not that intuitive and clear from your video, as you seemed to be showing the plug from the front, and then removing it from the back with the form-tube in the front.  If you could add a few still photos, zooming in to help locate it (at the point or at the end) to your video, it would be great!
srl7409 lefever (2 года назад)
+Bavarian Autosport working on a 04 325xi. what is the best way to get the engine block drain plug? it seems to be in a very inconvenient place. or is there another way to drain the coolant system completely? thanks and always great info.
Bavarian Autosport (2 года назад)
+Frank J We really couln't get any good shots on this 4wd model, but....... The plug will be the only large hex-head (like a bolt head) on the side of the engine block. The newer 6-cylinder engines have the plug between cylinders 1 & 2 or 2 & 3. The earlier engines have it located between cylinders # 4 & 5. The plug will be a few inches above the mating seam for the engine block to the oil pan.
DrE38 (3 года назад)
When flushing multiple times, do you use regular tap water or distilled???
Gerry Reggea (1 год назад)
just the answer I was looking for. thanks
Bavarian Autosport (3 года назад)
+gtarules1 You should use the distilled water for all flushing stages. this way, you can be assured that you have no standard water (electrolytes) left in the system when it's time for the final fill.
homer23422000 (3 года назад)
Have you guys heard of repeat thermostat failures? It's probably a coincidence, but my aftermarket thermostat was stuck closed a couple of weeks ago, and now my OEM thermostat is stuck closed and I just put it in last week.
See5 (3 года назад)
Hi, What do you think about replacing the original thermostat with and aftermarket one in order to reduce the coolant temperature (Since I am assuming that the thermostat cannot be adjusted) ? My car is 2008 750li and the coolant temperature reaches 113 Celsius while stationary, I drive in areas reaching an outdoor temperatures as high as 50 Celsius and I am using 50/50 water+coolant mix (I guess it should not exceed 100 Celsius so that water doesn't evaporate) The high temperature result in damaging most plastic and rubber under the hood.For example, the reservoir now needs to be replaced as its plastic got damaged from the excess heat and it now allows coolant to leak through it. Also the cabin filter boxes plastic broke into pieces. I discovered that most of the plastics in the hood cannot handle such heat. Please help me with your suggestion to reduce the engine heat, keeping in mind that there are no problems in my cooling system and this is the factory set temperature range,thanks a lot in advance :)
Matthew Cunningham (3 года назад)
Great Video!
John Moran (3 года назад)
i have a 2002 bmw 325i and when i got home a heard a hissing noise from the engine-i popped the hood and saw steam come from the engine and a little coolant from the area of the thermostat- i have started the engine but don't see any coolant-what can it be?   
nawfal jardak (3 года назад)
do you have a video show how to flush heater core in E32 7-series
Bavarian Autosport (3 года назад)
No, but flushi9ng the cooling system will also flush the heater core (do the flush with the heat on HIGH).  If you have a partially clogged heater core, you can try running a hose directly through the core ... via the core inlet and outlet pipes at the firewall.
meedka (3 года назад)
Thank you for the video, its great to have professional help on these vehicles. I am a new owner of a 2000 BMW 323i for about 3 weeks. During researching the car before purchasing it, I saw that the cooling system is a weak point so I have done a complete cooling system overhaul. New radiator, water pump, thermostat, expansion tank, hoses, and temperature sensor as well as the coolant level sensor. After bleeding the system over a couple of days (allowing the engine to cool down overnight and adding fluid immediately in the morning) my coolant level light comes on after the car warms up indicating low coolant. I have read that overfilling the expansion tank can cause it to rupture prematurely so I have only added fluid to the COLD engine to where the coolant level bobber just hits max. Although the plastic bobber mechanism is slightly covered with coolant I can clearly see the mechanism through the fluid. I noticed that you filled the expansion tank to the rim when hot which would equal about halfway when cold. My long winded question is can you explain proper coolant level inside the expansion tank. Thank you.
Bavarian Autosport (3 года назад)
You're fine to fill the tank close to the top.  This will not cause the tank (or anything else) to crack.  As the coolant expands (as it heats up), the excess will be expelled through the overflow, via the pressure release in the cap.  This would be normal.  Sooo ... just fill it up and let it find it's own level as it gets to running temp.  People that have talked about overfilling and cracking tanks or whatever, have simply experienced coincidental failures.  The only other possible point would be a cap that has a faulty pressure relief valve that is "stuck closed".
vergilio (3 года назад)
Hi. Love your videos, I learn a lot from them. Just one question please : do you use distilled water or deionized water (aka demineralized water)? Thank you and keep up the good work.
vergilio (3 года назад)
+BavarianAuto Thank you very much for your prompt answer. Best regards.
Bavarian Autosport (3 года назад)
Deionized is the best, distilled is OK if deionized is not readily available.
jocevi1773 (3 года назад)
Otto then if I am going to use 4 gallons of coolant that means that that is what I am going to get from the car I mean the old coolant because I drained it from the radiator and I just got less than a gallon
Bavarian Autosport (3 года назад)
+jocevi1773  - 8.8 quarts
jocevi1773 (3 года назад)
+BavarianAuto sr another question my 03 bmw 325i is 10 quarts coolant capacity too like the one in the video?
Bavarian Autosport (3 года назад)
We're not exactly sure just what you're asking.  However, if one gallon was removed 9and the system was full), you will be refilling with one gallon.  Now, if you are doing a flush, you will get more than a gallon out if you remove the engine block drain plug and the radiator drain (or remove a lower hose).  There will still be coolant in the system where it can't be readily drained.  this is why we do the multiple flush and drain procedures, with the water .... so that what is left in the system is just clean distilled or ionized water.
Damon Mattheus (3 года назад)
Keep making those videos. Aloha Otto, thank you for your time to help us guys on the correct way to do this. Would you consider doing videos on 2003 Z4's?
Bavarian Autosport (3 года назад)
Thanks! As for the Z4 specific DIYs; we need to consider the overall usage each of the videos that we produce.  Most of what we do can be used and adapted to your Z4.  However, tasks that are specific to a Z4 model may not be covered well by our videos.  Hopefully, Bentley Publishing will have a Z4 manual soon!
jocevi1773 (3 года назад)
Hi Otto what happens if I just drain it from de radiator and not from the block the thing is I can not see the block drain plug, my car is a 03 bmw 325i
Bavarian Autosport (3 года назад)
You can do this, but you will have to do more flushing with the water only, in order to get rid of the excess coolant that is in the engine.  The drain plug on your 325i is in the same place as shown on this X5 (same M54 engine),.  Also, you can get another view of the plug in our water pump replacement video, which was done on a 2005 325i.  Click the link to go to the video.  The plug is shown starting at time 5:54. https://www.youtube.com/watch?v=rcNa4e8d2VA
Brian Loney (3 года назад)
Great Video, I will be doing this to my Daughters car in the Spring. Thanks Again
Bavarian Autosport (3 года назад)
Thanks Brian!  Just give us a call and we'll help you set up what you'll need.
evilcowboy (3 года назад)
heard a lot of good stuff about BMW antifreeze. I have heard it is a good antifreeze for aluminum block engines along with asian pink coolant. Honestly how does this coolant stack up against the green stuff? Not looking for a big debate but I have thought the green has a 60+ track record of working just fine while this is still relatively new. So curiosity has got me thinking. I already know there are coolants that are the death of an engine (yes I am talking to you GM) but I've never heard anything bad about this coolant and so I am actually considering putting this into a GM car with an LX5 engine (all aluminum engine). I want to keep the car alive (It being the final model of Olds before it went belly up its an Intrigue)  and recently had a water pump failure so it gave me a chance to flush the deathcool and refill with a coolant of my choice. Personally I like to take a lot of care of the cars I get so I think BMW has made some really good advancements and many that other manufacturers have followed (yeah GM even copied the bleeder on the radiator on this car as well). I believe the LX5 was GM's answer at the time to all aluminum DOHC V6 design that other overseas cars carried. The Intrigues body style was an attractive one and has left me wanting to breath new life into this car. Thanks in advanced for any light you may shed on the coolant used in BMW's
140VM (3 года назад)
This is by far one of the best videos I've seen! I have a question, not BMW related but an Acura. I replaced the radiator and have filled it with coolant using the spill free funnel. The heat controls are electronic so I couldn't really have the heat up without running the blower. My coolant starts to bubble up and the level rises way over and splashes around the funnel. What am I missing here? Thanks
Bavarian Autosport (3 года назад)
+techguy1678  - you should be fine at this point.
140VM (3 года назад)
+BavarianAuto I had it running for about half an hour just to be sure that I had all air out. Now what I was doing was, turn the heat off and then the coolant level would rise and start to bubble out of the funnel. Now everything seems to be working fine, I've driven it on the highway and no overheating issues so far.
Bavarian Autosport (3 года назад)
You may still have air in the system.  How long have you been running it for this to happen?
Spartan (3 года назад)
and another question haha, is it fine do add the coolant and water separate as you did will it eventually all mix or should I pre mix it thanks ! sorry for all the questions fix time doing this
Bavarian Autosport (3 года назад)
Yes, it will mix while running in the system.  This is really the only way to assure that you are at a 50/50 mixture (or what ever % mixture is desired) as we don't know for sure how much water is left in the system.
Spartan (3 года назад)
Also when you flushed the system with water you used 2 quarts correct and turn on the engine to get to normal operating temperature or do the heater flaps open up soon thanks
Bavarian Autosport (3 года назад)
The quantity of water required for the flush will vary from vehicle to vehicle.  Distilled water is cheap at the grocery or Walmart.  Just grab a few gallons.
Spartan (3 года назад)
I've read online that the BMW E46 330ci takes 1 Gallon BMW coolant and 1 gallon water is this true ?
Bavarian Autosport (3 года назад)
Two gallons is 8 quarts.  However, the fill quantity of the system is more like 10 to 13 quarts.  Therefore, you'll need two gallons of each for the final fill ... but you won't use it all.
Spartan (3 года назад)
when I flush the system with the water to wash out any old coolant do I run it to operating temperature and then let it fully cool down and repeat or could I just flush the plain water when still at operating temperature and just be cautious also you said some gets left in the system did you do this on purpose or is it just because some gets left behind ? thanks
Bavarian Autosport (3 года назад)
You don't have to wait for a full cool-down ... but just be careful of the hot water.  Yes, some water is just left in parts of the system that you can't readily drain.  For this reason, we suggest that the water flushing be done with distilled water (just like you'll use for the final fill).
Mike McGuire (3 года назад)
I have 2008 335xi I was down about a half of quart didn't have coolant so I put in distilled water 2 days later I got a po128 code do you flushing would work before changing thermostat thanks
Bavarian Autosport (3 года назад)
The 1/2 quart of added water would not cause any problems.  The thermostat code (P0128) is likely just coincidental.  Clear the code and if it returns, you need a new thermostat.
ghostsix69 (3 года назад)
Why mixing distilled water with coolant fluid? Any common problems if not mixed? I drive a '08 335i, and just added a little bit of BMW coolant fluid after low level checked, but without distilled water. Had a problem like 1 month after, seems like water pump and thermostat are out... is it in relation with?
Alter (3 месяца назад)
I use what's recommended for my car by BMW. And that is Blue one.
N Ver (3 месяца назад)
You guys still use that Blue / green stuff? Here Europe that is not even allowed anymore. It is to harmful for the environment.We use G12 or Coolant SP 11 that goes undiluted into the reservoir, it is especially made for cars with and aluminum engine block. It is not corrosive. For the engines made out of cast iron you can use the blue stuff.
AdrianJayeOnline (5 месяцев назад)
BMW coolant is a minimum 50%/50% depending on your local weather, because the OEM stuff is NOT PRE-MIXED do NOT use 100% BMW coolant, because 100% coolant will NOT cool down your engine (funnily enough) the water component does the cooling.
Bavarian Autosport (3 года назад)
No, your current pump/thermostat issues are not due to adding 100% coolant.  Adding just a bit of straight (100%) coolant will not cause any problems. First, we use distilled water so that the minerals are removed.  This keeps the electrolytic corrosion to a minimum over the life of the coolant.  Secondly, we mix it 50% with the water as this is what the coolant is designed for.  We would only use a stronger concentration if we needed very low temperature freeze protection (typically below the -30-f range).  Since the coolant does not transfer hear as well as water, this is why we do not run it stronger than 50%, unless required, as just noted.
LiNingAir (3 года назад)
Why do people only drain the coolant from the radiator? Is this enough when it comes to draining? Or would you have to also drain the engine block? Also, the heater in my car seems to be not working. Will this affect my flush by overheating the engine?
Bavarian Autosport (3 года назад)
Draining just the radiator will only remove about 1/2 of the total coolant from the system.  You need to also drain the block and do the flushing in order to achieve a full 100% removal of the old coolant.  We can't say why your heater is not working (many possible issues) but this should have no effect on a flush job.
LiNingAir (3 года назад)
Will a new crusher washer be needed for the two plugs?
Bavarian Autosport (3 года назад)
We do prefer to use new sealing washers.  However, if they are not available for some reason, the old ones will usually seal.
MrWati25 (3 года назад)
I have the 99 bmw 328i E46 model, where exactly is the engine block drain plug? on the 2.8L? Also when flushing, can I use plain pipe water to fill and flush the system, and do I have to have the engine running to operating temp before I drain the water?
MrWati25 (3 года назад)
+BavarianAuto Thankyou!!
Bavarian Autosport (3 года назад)
The block drain on your M52TU engine will be in the same relevant position as shown on the M54 engine, in the video.  We would suggest using distilled water to do the flushing since some of it will be left in the system when you are ready to refill.  The reason to run up to operating temp is so that the thermostat opens and allows full flow of the flushing water through the engine and radiator.
Kid Charlemagne (3 года назад)
After draining is it normal to have some old coolant left over inside of the expansion tank?
Jobwit (2 года назад)
+BavarianAuto When you flush with fresh water, do you have to get the air out of system when you add just water knowing you will drain the water before refilling?
Bavarian Autosport (3 года назад)
Yes .... as well as other areas of the system.  This is why we do the flush with fresh water before refilling.
Doug Haddock (3 года назад)
I have a F25 2011 X3 28i and I can't find the radiator drain plug.  Did BMW do away with the radiator drain plugs on the F models?  If so, do you know what the procedure is for replacing the coolant on the F25 models?
Doug Haddock (3 года назад)
+BavarianAuto Thanks for the reply.
Bavarian Autosport (3 года назад)
We have been noticing the lack of a drain plug on the latest models.  The micro-film drawing shows a plug in the lower radiator hose at the end connecting to the thermostat. other than this, you would just remove the lower hose from the radiator nipple to drain, as well as opening any other hose connections that are convenient to work with.
A* (3 года назад)
Hey, my question might seem a bit stupid, but should I bleed the cooling system if I have opened the radiator cap just to check the coolant level and then closed it again? I am not experiencing any kind of overheating or AC abnormalities until now. (BMW e46 318i).   
A* (3 года назад)
Hey, my question might seem a bit stupid, but should I bleed the cooling system if I have opened the radiator cap just to check the coolant level and then closed it again? I am not experiencing any kind of overheating or AC abnormalities until now. (BMW e46 318i).
Bavarian Autosport (3 года назад)
+BloodScatter http://media.pcgamer.com/files/2010/07/world-of-tanks-thumb1.jpg
A* (3 года назад)
Great, tanks :)
Bavarian Autosport (3 года назад)
No need for bleeding, just opening the cap and/or adding coolant.
Amish Ware (3 года назад)
Just to point out on sentence 'Normally, one time is plenty' at 5:30. I flush my system 4 times with destilled water until i got clean water. Heater was set to max, and both engine block and radiator drain plug were drained. Thermostat is the key. It remains closed until temperature is high enough. If you don't have patience and time to flush many times like i do, there is better way which ensures total system flush (without old coolant in the system). - Warm engine until radiator fan turns on (Thermostat is opened long before this happens but wait for it just to be sure). - Flush cooling system from both engine block and radiator until thermostat is opened. This step is crucial and most dangerous, because coolant is still very hot. I recommend using gloves and extended tools for opening drain plugs. - If this is first flush of old coolant, additional flushing with destilled water (again while thermostat is opened) should be plenty, and guarantees clean cooling system. - Now it is ready to fill with 50:50 mixture.
Mouayed Makhlouf (3 года назад)
while doing the bleeding and adding the disteled water, i know the heat was on high, but was the engin on as well?
Bavarian Autosport (3 года назад)
Yes, on models that have engine driven water pumps, you have the engine running when filling and bleeding.
J. (3 года назад)
I got a 98 E36 323is, how much coolant will I need? Also when you flushed out the system with water you said you had 2 qts left in there when you started adding the coolant. Did you flush out the water with the drain plugs out, put the plugs back in then added the 2 qts of water? Hope to hear back quick, thanks.
Bavarian Autosport (3 года назад)
Your 98 323is needs 2 gallons of coolant (www.bavauto.com), to mix with 2 gallons of distilled water.  This is a total of 16 quarts, which is enough for most BMW and all MINI systems.  The two quarts of water is what is left in the system after the final draining.  This is left in areas of the system that can't be drained without total dissassembly.
tucan452 (3 года назад)
I be needing help with my 2005 BMW 325i Oil Cooler Thermostat For Automatic Transmission Models and the coolant recovery tank instalation and don't know how to remove oil cooler thermostat tanks
Alan Medina (3 года назад)
Thanks For the help
Bavarian Autosport (3 года назад)
See if this helps: http://blog.bavauto.com/15186/bmw-m54-6-cylinder-coolant-thermostat-for-automatic-transmission-broken-how-to-replace/
samuel figueroa (3 года назад)
the question i have is, does the engine need to stay on from the start of the fill to the end???
Bavarian Autosport (3 года назад)
Initial filling can be done with the engine off.  Once it is initially full, start the engine and work through the bleeding and further filling as shown.
Cruz Arroyo (3 года назад)
muchaaas grasias por poner estos videos alluda para mucho
George Butt (3 года назад)
My car is an e46 325i. My upper rad hose is not too hot to touch but very warm + hard. I noticed this after filling my expansion tank full. As it was just hitting the lip of the opening where the cap goes, it continued to very slowly rise and overflow, which lead me to put the cap on. I didn't notice any air bubbles as it rose. Also, my temperature gauge was dead center at normal operating temperature as this all happened. The gauge continues to stay normal WHILE the hose is very warm and hard. This is a NEW hose i just replaced but i'm still worried. What could be the problem with this, considering all these factors? 
keviL (4 года назад)
I was planing on doing it on my e36 m50b25 (95 325is 2.5L). How much coolant will i need?
Bavarian Autosport (4 года назад)
The Bentley publishing repair manual for the E36 models will include the coolant fill capacities.  The 325i models have a capacity of 10.5 quarts (10 liters). Bentley repair manuals: http://www.bavauto.com/se1.asp?dept_id=5228
Sandeep Veeramani (4 года назад)
How much would I need to fill if I did this on a N52 E60 525i 3.0L engine?
Bavarian Autosport (4 года назад)
+Sandeep Veeramani In looking at the BMW Micro-film drawings, it looks like the block drain plug is on the driver side, between cylinders 2 &3.
Sandeep Veeramani (4 года назад)
+BavarianAuto  Thanks for your prompt reply. I just realized that the N53 engine does not have a drain plug on the engine block. Is that true. In this case what do you suggest?
Bavarian Autosport (4 года назад)
The Bentley Publishing repair manual for the E60 chassis, notes that the fill capacity for the N52 models is 10.6 liters for manual transmission and 10 liters for automatic transmission. The Bentley repair manual is available in our online store at bavauto.com
Brandon Ellis (4 года назад)
I may not own a bmw but i find your procedure very useful. I actually used this method on several of my friend´s vehicles from a chrysler to a Nissan. My house has very hard water and i was concerned aboout doing a traditional garden hose flush. It never occured to me to fill with distilled water and drain again. Saved my buddies and i allot of money as well. Distilled water is allot cheaper than pre mixed coolant off the shelf.
Bavarian Autosport (4 года назад)
Glad to help.  Our BMW & MINI customers and owners may have other vehicles as well, and these procedures can be applies in a general way to any make/model.
Raksasok Heng (4 года назад)
i have 328xi 07 e90 do it do the same this video ? and how many gallon do i need ? thank you 
Bavarian Autosport (4 года назад)
The general procedures will be similar, but your block drain, radiator drain and expansion tank fill will be different.  The bleeding procedure is also different since you have the electric water pump.  See our video on replacing the electric water pump for the filling and bleeding procedures. http://blog.bavauto.com/14581 The 328i/Xi (and all N51/N52/N54 6-cylinders in the E90x 3-series chassis) has a total capacity of 2.17 gal for manual trans and 2.23 gal for auto trans.
ChevyVoltarian (4 года назад)
Once completely full, does a small amount of fluid not need to be siphoned back out to get a true full reading? Also, do you have a video on how to bleed an electronic water pump with the self bleeding feature? 
Bavarian Autosport (4 года назад)
Once you "fill" the reservoir and replace the cap.  The system will stabilize as the engine is run and brought up to regular operating pressure.  As the coolant heats and expands, any excess will vent from the expansion tank.  At this point, the system will be stabilized and at its normal "full" level. Watch our video on replacing the electric water pumps for the bleeding procedure on vehicle equipped with these new style electric water pump cooling systems.  The bleeding procedure is near the end of Part-2. Video DIY - BMW electric water pump replacement: http://blog.bavauto.com/14581
David Yearley (4 года назад)
Hi Otto, have followed a few of your DIY's and they are spot on. I am currently experiencing a problem which is related to this DIY and I hope you can offer some advice. After a drive and my car cools down, I check my coolant level and I see it has dropped to below minimum. If I loosen the bleed screw some air escapes through it and my coolant level indicator rises back to max. If I go for another drive and check my coolant after my car has cooled down the same thing happens. No coolant loss and no leak obvious. I have tried to bleed but maybe I am not bleeding properly and waiting for the air bubbles to escape fully. Any thoughts would be helpful :-)
Bavarian Autosport (4 года назад)
What model is this?  You are not having to add any coolant?
Maxwell Tengbeh (4 года назад)
thank you for all the videos. I love them all. Max
Hussain Ahmed (4 года назад)
How much coolant came out after you drained the block and rad?
Bavarian Autosport (4 года назад)
We didn't specifically measure, but about 8 to 10 quarts.  The Bentley publishing repair manual will show the full fill quantity for the coolant.  We have the manuals at bavauto.com.
Justin Barnard (4 года назад)
Auto, your videos are flawless! I just wanted to let you know you're doing an awesome job. Great DIY's.
Bavarian Autosport (4 года назад)
Thanks for the good words, Justin!
Jean Absence (4 года назад)
I will be needing to fill my coolant soon, should I get it flush before refill? since I'm not sure if the cooling system has been maintained at one point. What type of coolant do you think is best to use? .
Bavarian Autosport (4 года назад)
You can use the BMW coolant with distilled water.  The system should be flushed every two years ... three years max.  If this has not been happening, you really should consider a flush at this point.  The BMW coolant 9and the other tools shown in the video) is available at bavauto.com or 800-535-2002.
MultiSniipez (4 года назад)
by the way you said ''bently'' and not bmw repair manual
Bavarian Autosport (4 года назад)
This does cause confusion .... The manuals are from Robert Bentley Publishers.  We'll try to be more clear when noting the manuals.

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