The million mile 12v Cummins is dead! Time to teardown & rebuild.
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We show you everything you need to know to keep a million mile Dodge RAM hauler on the road by rebuilding a "new" 250k mile 5.9 Cummins 12v 6BT.
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Piston rings aren't tapered. That's not a thing. Pistons won't "deform" from lying down on a bench. That's also hogwash. This guy has probably been to Youtube university, or is just saying random words that make no sense. He seems to know what he's talking about... kind of... that's why i'm kind of confused.
I should say about the "laying your camshaft down, it could bend" Technically my first statement that said "that isn't a thing" isn't true. It's a thing, but only on a much larger scale, with much larger pieces of steel. Very large pieces of equipment, like turbines in a power plant (70 tons) have what's called a turning gear. When the turbine is out of service they rotate them constantly at a slow speed. If it's stopped for a long period of time, they put it on the "turning gear" for a period of time for it to true up. It's an extremely small amount of run-out that could be created. When you have tons and tons of metal spinning at 3600rpm it's a little more important than a camshaft that is light weight and spinning at 2000rpm at the most.
This series is very relaxing to watch and very informative. Nice to see someone actually taking the time to teach us something that's real world usage instead of the over the top tech nobody actually needs
Geez, I remember when I replaced the cracked stock iron manifold on my 2001, I can't believe Cummins used to have those awful log turbo manifolds on these engines. The cast steel 3 piece split volute turbo manifold I replaced mine with has been going strong for nearly 7 years now.
I'm resealing a 95 cummins before it goes in my truck only 200k on it the only issue I see is there's a lot of build up under the oil cooler on cylinder walls in the water jacket. Anything I should do while it's apart or just flush it when it's done
Hey would it be easier to just pull the engine if I need to do front and rear main seals, oil cooler seals, vacuum pump rebuild, and reseal the pan and timing cover? I'm thinking if I go through the trouble to pull it then I will do studs and head gasket as well. Your channel is awesome.
+DEBOSS GARAGE ok thanks for the replies. I'm down in southeast utah and don't have any rust so I think I'll try lifting the cab. Anything else I should replace while it's out and convenient that will save me time later on? Truck has 270k miles, just small oil leaks that I'm going to address.
the comment at 12:20 is patently false. Aluminum is not a super cooled fluid, nor does it act like a super cooled fluid The piston will not distort under it's own weight no matter how long it is left resting on itself. other then that, good video.
I believe a Cummins motor can make 1,000,000 miles. The front end, a complete disaster. I had a ‘97 3500. I went through track bars once a month. Bone stock suspension. 235/86R16 Michelin LTX M/S tires. Figure that out and I’ll buy anything you sell. Even if you use kilometers and liters and all that communist measurement crap.
Pirateofthesage a lot of people have these problems with jeeps too. Sway bar links are very important. Track bar is just one of 8-9 parts that need to be in spec. If they all go bad then you need to replace them all. Your track bar is being wrecked by something else.
I own a 2003 cummins, has ran like a scalded ape since I bought it, 398k miles and 800 hp later #5 ate an exhaust valve. The head has never been off the truck until then, pulled the head and every cylinder had perfect cross hatching. No idea how as the truck was ran pretty hard. Made a shit load of power and pulled often aswell.
I'm SO tired of the "distorting" pistons/crankshaft BS!
If you have ANY METAL in an engine SOFT enough to "distort" while just sitting on a bench top or shelf, then it has NO place in my engine! Never "Stand" or "Hang" a crank or camshaft, because you are More likely to knock it over or drop it, causing "real" damage, as opposed to Imaginary bending, or distortion, from laying it down. This Stupid Myth should have Died before it EVER got started! I was discussing this very subject, with my machineist, and asked him why He "stood" His cranks up, and he says, "It has Nothing to do with keeping them from bending, it's because they take up less room that way!" We discussed the Fact that "Standing" a crank up actually applies a Much Higher "bending" force against the rod and main journals, due to gravity and the weight of itself, then if you lay it flat. This is a rediculous Fairy Tail, that needs to go away!
Last question for you. Don't you think a 30 pound Harmonic Balancer, would cause the end of your crankshaft to bend down and wobble, If you didn't start it for a year?
Answer OF COURSE NOT! So laying a piston down on ANY TABLE under its Own weight, WILL NEVER DISTORT IT TO ANY MEASURABLE EXTENT! Prove me wrong!
Lol that has to be some of the biggest bullshit I've ever heard don't lay the Pistons on their sides because it will distort them ha ha what in the hell? They go up and down hundreds of times a second and deal with 800+ degrees of heat what the hell is it gonna do if you lay them on their side I have never heard of that....
I had a 24 valve with 53 cracked block, that I swapped with a 56, I just wasn't sure if it was ever heard of a 12 valve 53 cracking. ? I guess it is a completely different stamp (24 vs. 12v.) and mine was turned up quite a bit @ 275000mi. With that many miles/hours on an engine, its had an awful lot of heat cycles! I was at a machine shop that had a 24 valve block( non 53) (run as a generator) and they said it had 80,000 hours and it needed everything done to it.
I know you work on older motors (5.9's and the lot) but the 6.7 is getting close to 10yrs in some trucks, would you ever do a video about the 6.7 cummins. I would like to hear your thoughts on them in general (maybe a everything wrong with video or if its worth getting one over a 5.9?)
Wow!! This is a great video, I have heard that there may be only 3 cam shaft bearings, and if during the rebuild, will you install additional cam bearings? I have older 24 valve engines and would like to install stronger valve springs. What is your take on the number of cam bearings? 🙄
You disassembled that truck with such care and finesse lol. I’ve had pretty good success welding nuts to the exhaust studs letting them cool some then with great care and finesse put you impact wrench on it lol. Joking aside, I am serious about the impact. You just have to know your gun well and be easy on the trigger and let those “ good vibrations “ go to work. Lol.
So what brand of oil filters is recommended? Sometimes to get rusty bolts out, heat it then put oil on it while it cools- somehow the oil gets sucked in between the parts while they cool. I don't know the scientific explanation, but it works. Also save those dodge seats if they're not ripped.
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