3.8L Jeep engine rebuilding!
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- Опубликовано: 13 окт 2023
- Follow along as I make progress on my Jeep 3.8L engine rebuild. Cylinder heads and pistons are already installed prior and engine was already timed because I didn’t feel like making a video lol. Let me know what you think about this one in the comments!
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Did this myself a few years ago at 140K miles. The carbon build up on the pistons was insane; it took a few days of soaking in chemicals in a home depot bucket to remove all the junk (literally took two weeks for all 6 pistons). I also did the crankshaft bearings just for good measure since so many people had spun theirs over the years. I was surprised the amount of cylinder honing left in place; the walls were not mirror-like at all...they looked almost freshly honed, but then again I have changed the oil every 3k miles since new. The only thing I would have done differently is pulling the whole engine so I could have done the rear main seal. It might have made the rest of the job a lot easier lol. Unfortunately it is leaking coolant again 60K miles later. I am pretty sure this is due to etching on the block (I had the heads machined but didn't do a whole lot the the block because I did not want any contaminants falling into the crankshaft from above). Oh, and the new exhaust headers cracked shortly after. I knew better and should had just purchased aftermarket headers.
Thanks for posting.
Great job! Really enjoyed it. Keep making videos because you can always pick things up from others. Really appreciated the tips on the oil pump. You did a nice job cleaning the surfaces but go to harbor freight and buy an angle grinder. The pneumatic one with scotch bright disc. They make cleaning metal surfaces super easy. Don’t doubt yourself. We all have those same concerns when doing timing chains and belts. Hope all goes well. God bless
I appreciate the feedback!
Great video.
I have a JK 3.8 I'm almost 300k now. I'm replacing head gaskets lower intake manifold gasket and Gasket headers. Unfortunately I have to take pretty much the orange in the park almost. It's 44° outside and I've been doing it off and on but we had rain two times already and my Pistons are exposed although under the hood two questions do I need to worry about moisture in the engine since it rained a couple days? And should I change my timing chain since I have everything apart already?
Honestly the chain is super simple to replace so you might as well since you’re in there. And at that point, I HIGHLY suggest you replace the oil pump pressure relief valve inside the bottom of the timing cover as well, (watch my engine installation video for further details about that) And I wouldn’t say the rain would cause a problem but of course you really should get that water out and cover the openings in the engine as soon as possible to prevent rusting the cylinder walls
@@trailbandit_ ok tyvm for ur reply.
Putting mine together now. Did you replace the litters? I got the melling lifters and the oil hole is on the side instead of the front facing the valley. I am not sure if it matters what direction they face.
@@spgirard30 it was a while since I built this engine so I can’t remember how the oiling passage hole was facing, but I would match it up with the old lifter and see if the oil hole is located in the same spot. If it is not, I would try sending them back and getting another set either OEM or a better aftermarket option since they were designed that way for a reason.
Hola