Got the GenRight bumper and my winch installed over the last couple days.
View attachment 484105
And had a super weird thing happen yesterday.
I was working on my bumper and some buddies called from the Jeep Trail above the house. As friends do, they were giving me down the road about not being out on the trail (even though I was literally wrenching on my rig).
So I threw the bumper on, found a couple tools I needed and headed out to run in from the west end and meet them. On the way up the mountain I aired down to 15 and took off a little quicker. Suddenly the dash lit up like a Christmas tree, oil pressure dropped to zero, and it started bucking and jumping. I stopped and the oil pressure came back up but there was a knock.
First thought was spun rod bearing but I shut it down and checked the converter bolts and a couple thing. It's a 4.0L so they're good for 30k miles with a rock knock (lol) so I just keep on toward the trail.
I stopped on the trail and scoped the noise with a long screwdriver, but there was no report on the knock through the block or valve cover or any of the accessories. *shrug*
I just kept getting it till I ran into my buddies. Crawled around on a couple obstacles and then followed them off the trail. By the time we hit the gravel road, the knock was almost gone. By the time we made it to their camp, you had to strain to pick it out over the usual 4.0L rattles.
Drove it home and parked it, wasn't even sure it was knocking by the time I got home. Then this morning took it out to wash it and the knock is completely gone. I changed the oil this morning, took the converter looser and the flex plate is tight to the crank and seems to be OK. Bolted the converter back up and still no knock.
The two prevailing theories are:
Mine: I WAS a little low on oil (just below bottom mark) so I'm thinking I pumped a bunch of oil up on the head, lost pressure and collapsed a lifter and it took a couple heat cycles to pump up completely.
Matt's: starter bendix bounced out and stuck so that it made contact with the flex plate and after several starts, completely retracted and the noise disappeared.