what would cause this noise?? - Page 2 - JeepForum.com

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post #16 of 23 Old 11-20-2013, 06:19 AM Thread Starter
lsuguy4
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I just thought bearings expand qhen they heat up and thats why the noose stops when its fully warmes up

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post #17 of 23 Old 11-20-2013, 07:07 AM
BIGBADWOLF
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That is not what bearing or lifter noise sounds like. Check flex plate
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post #18 of 23 Old 11-20-2013, 07:54 AM Thread Starter
lsuguy4
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Flex plate has been changed with a new one. Still same noise
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post #19 of 23 Old 11-20-2013, 07:55 AM Thread Starter
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No the flex plate has already been changed with a new one. A long with a new timing chain
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post #20 of 23 Old 11-20-2013, 11:07 AM
Evildriver-3
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It could be a piston and when it warms up it gets better, thats what a loose piston would do

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post #21 of 23 Old 11-20-2013, 11:33 AM Thread Starter
lsuguy4
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Im going to buy a crank kit and replace it all feom the bottom end. And if that doesnt work I will save up and buy a new motor
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post #22 of 23 Old 11-20-2013, 11:37 AM
parker2849
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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.
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post #23 of 23 Old 11-20-2013, 11:59 AM Thread Starter
lsuguy4
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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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