2000 4.0 "motor tick" - Jeep Wrangler Forum

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Old 01-06-2013, 11:13 PM   #1
Join Date: Jan 2013
Posts: 1
Shadygator is on a distinguished road
2000 4.0 "motor tick"

I have a 2000 Jeep Wrangler with roughly 160K miles. Recently I let it sit for a week and after sitting, I cranked it & it had developed a "tick noise" which sounds like it's coming from the top of motor or the front of the motor. I changed the oil & added 1 quart of resin to it, but the "tick" was still there. I was told to change oil again & add Marvel Mystery Oil, crank it & let water temp raise, then drive for 30 min's. I did this & the tick has very slightly gone away but still remains. I removed oil cap & noise never got louder, I was told to do this & maybe it would be a lifter. Oil pressure stays at 40. The noise does get louder at high rpm's.

I've been told its not a exhaust leak, I have noticed a loss in power (I think, haven't been in Jeep for 3 weeks) so it seems slow. I was told it couldn't be a loose rocker arm also.

The noise can sound like its coming from under the timing cover too. Could there be anything in there slapping against anything?

Im open to any & all suggestions. Im gonna pull valve cover off this upcoming weekend, but wanted all opinions before before hand, maybe some have seen or heard of this. THANKS in advice.
Shadygator is offline   Quote

4.0 , lifter chain piston valve , noise

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