I did that after the knocking was evident, thinking it was a stuck lifter.
TJ Engine Replacement Project
- Thread starter wct097
- Start date
As far as Seafoam goes, I've always been told if you put Seafoam in the motor oil, you better only start it up and run it for a couple of minutes, shut it down and change the oil. We did that to my stepfather's POS Chevy 1-ton. It had a knock and we though it was carbon build-up.
After the 4.2L's long block rebuild, I ran Marvel Mystery Oil in both the oil and the first tank of fuel. That was a hell of a motor after the rebuild. I should have never sold that motor when doing the GMPP motor swap.
After the 4.2L's long block rebuild, I ran Marvel Mystery Oil in both the oil and the first tank of fuel. That was a hell of a motor after the rebuild. I should have never sold that motor when doing the GMPP motor swap.
I may skip the Seafoam. I was thinking it might help get the baked on dino oil off of the internals, but the next oil change interval with Synthetic may do just that. My main concern is getting an early oil change to get out any trash that may have been introduced into the engine while we were working on it.
Mileage on the TJ OTW to the shop this morning.
Got started about 9:30 this morning.
Had the engine out by noon:
Swapped over the motor mounts and accessories:
Back in by about 2 or 3:
Only issue is that my brother took off the charcoal canister and I ca't figure out where this hose went. Couldn't find it anywhere.
After about a half hour trying to figure out why it was missing I found that I had mixed up two of the plug wires. After that it was running fine. Pulls hard, no smoke that I could detect. No noise. May actually have a bit more power than the original engine had.
Got started about 9:30 this morning.
Had the engine out by noon:
Swapped over the motor mounts and accessories:
Back in by about 2 or 3:
Only issue is that my brother took off the charcoal canister and I ca't figure out where this hose went. Couldn't find it anywhere.
After about a half hour trying to figure out why it was missing I found that I had mixed up two of the plug wires. After that it was running fine. Pulls hard, no smoke that I could detect. No noise. May actually have a bit more power than the original engine had.
Quick swap. No project of mine goes that fast. Price out that rebuild stroker motor and you'll see your coming close to ls swap money.
Going to bring the engine home on Monday and start taking it down. Once I've got it apart, I'll start shopping around for machine work.
Here's a video on the TJ prior to the swap. Drove it to the shop this morning and made a quick video of the noise it was making.
To be fair, I credit the success to my help & the shop. My brother and his roommate that work at the shop helped big time. Also had another friend come help for the day, and yet another friend that helped me transport the engine between the shop and my garage and back. I imagine it would have taken substantially more time to do in my own garage. It was really a blessing to have a lift.
Good job. Did the oil filter mounting cause issues? I see it's different on both engines.
Oil filter mounting didn't cause any issues, though I admit it was on when I installed the engine. Didn't notice it looking too tight to get off. I think if anything, it'll be a little more space with this layout. When I used the larger filters (PH8A / M1-301) size on the original engine that they came extremely close to the frame rail. I was concerned that they'd hit and be damaged, so I usually ran the stock size.
Didn't really look at it. I wonder if I can swap the oil filter mount to the other engine when I get it rebuilt.
Buddy had a problem on a CJ... wasn't too large a filter, something about the motor mount was installed wrong. A little torque, engine twisted... and oil was everywhere.
I ran them for a bit without any issue. Couldn't tell that they hit at all, but it was pretty close and wouldn't have taken much flex.
I have to wonder if the engine in my XJunk is original. While I had it on the lift I noticed numbers on the block which remind me of those written on with a paint pen by junkyards.
It's a 2k which could easily mean somebody cracked the head, overheated and ended up replacing the engine.
Only lost 1/3 qt in about 4500 miles though so I'm not unhappy.
It's a 2k which could easily mean somebody cracked the head, overheated and ended up replacing the engine.
Only lost 1/3 qt in about 4500 miles though so I'm not unhappy.
If you look at the picture with both engines, you'll see that they both have paint markings of some sort on the side. I sincerely doubt that my TJ has ever had the engine out before, but I suppose it could have happened in the first 30k...
Great work, Will. I still think you should go stroker and make it with the effort.
Thanks. I intend on having the oil pan off the original engine Monday. After I know what I'm dealing with, I'll start shopping for machine work and a 4.2 crank. Will probably go with one of the 4.6L strokers with the 4.2 crank and 4.0 rods. The difference in cost for a full rebuild vs a budget stroker really is minimal since I was expecting to have to bore it and get oversized pistons as well as a new cam and lifters.
i had a 4.0 that was pulled from an XJ and it had the same kind of marking on it. yellow, i think. pops will be here tomorrow, maybe i will ask him if he remembers if they came into the plant that way.