I just thought bearings expand qhen they heat up and thats why the noose stops when its fully warmes up
It could be a piston and when it warms up it gets better, thats what a loose piston would do
1995 Jeep gc ltd, 2005 Jeep gc ltd , 71 Dart, 73 RR 440-6pk, 78 Mag GT, 85 Power Ram W-350, 92 Daytona, 99 Dakota, 08 Ram 2500
Less than 8 is like playing with half a deck
Long Island Motorsports Association
Hi, new here but i just picked up a 2001 jeep tj sahara 4.0l. The mechanic i got it from says he just put a rebuilt engine in it because previous owner let an engine knock go till it stopped working. when he pulled the head off all he saw in one of the cylinders was a rod and wrist pin no piston. It was found in the oil pan. Dont know if that helps. Just letting you know about this experience.
I had the pan off a couple months ago and I seen all pistons in place with no play against the wall. No movement side to side or up in down. Checked everything I could. I even turned the engine to make each piston sit at the top and see the walls with a flash light and nothing. My guess would be main bearing or a collapsed lifter. Going to pull the vavle cover off this weekend and see what I find. When I put my hand on the oil pan when could I feel more vibration on the number piston vslrs others. That when I took all the pan in the first place. A few small metal shaving in the oil pan under the gunk oil. You could barely see them but you could feel them.
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