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Old 10-04-2008, 05:42 AM   #1
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Join Date: Oct 2008
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Question motor noise

I just bought a 97 wrangler 4.0 5spd with 120k miles on it. The motor doesnt smoke and runs great. When I first crank it up 20 seconds later I get a rattle out of the motor until I take off and then its gone. My oil pressure is fine so I am thinking a lifter might be leaking down. It idles quite at red lights so what do yall think?

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Old 10-04-2008, 10:09 AM   #2
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Gennerally speaking, things that happen only when cold are by their nature, enviornmental. I'd go with the fuel system first. Dirty fuel filter, semi-bad sensor somewhere etc.

A lifter going out should get worse when it heats up instead of better. You can "mask" that by using a different motor oil etc, but this sounds more like fuel or bad input into the computer via a sensor.
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