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Unread 07-29-2009, 06:51 PM   #1
robiec04wj
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need help

My 04 wj has started this nasty lifter knock that keeps getting worse. Sounds like it is coming from the camshaft area on the passenger side of the heep. I have tried seafoam twice but to no avail. It has the 4.0 powertech with roughly 122000 on the clock. Is this a sign of worse to come or does anyone know of an easy fix. The ticking is intermittent ans is loudest near the camshaft sensor( where the distributed would be if it had one) any help would be greatly appreciated.

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Unread 07-29-2009, 08:52 PM   #2
simidrm
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What kind of oil are you using? if your running synthetic then change back to convential oil as synthetic is a thinner consistancy and regular ol 10w30 is a liitle heavier,also try rislone additive it is a upper cylinder lubricant will help if it's just sticky lifters
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Unread 07-30-2009, 09:30 AM   #3
robiec04wj
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I am using castrol gtx 10w30. I have never had a problem like ths before.
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Unread 07-30-2009, 10:07 AM   #4
StrokedWJ
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Have you dropped the oil pan? Thats about the same mileage my 2000 4.0L had when a piston skirt broke. (That would probably be your "worst case" scenario though)
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Unread 07-30-2009, 10:15 AM   #5
kc8ztw
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change the oil and run 1 or 2 quarts of atf and the rest 5-30 conventional oil and run that for a little while and see if it gets better. if it just gets worse then you wanna fix it.

ps yes thats right run atf in the oil!
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Unread 07-30-2009, 10:29 AM   #6
michiganmaveric
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Sounds like you have the infamos piston slap/knock problem. I had it and lived with it for about 18 months until it got so bad that I could not stand it any more.

I had my engine rebuilt at 168,000 to get rid of it. The 4.0 is pretty well noted for this problem.
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Unread 07-30-2009, 11:00 AM   #7
robiec04wj
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I guess I could drop the oil pan. It does a have a slight leak around the lip anyway. The only thing is it doesn't sound like piston slap. Has about the same click as pulling a plug wire off a small block chevy and touching it to the block.
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Unread 07-30-2009, 01:15 PM   #8
kc8ztw
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you could have the piston slap issue but the analogy you used makes me almost agree with you about the lifter. its always worth the atf thing first cause that cost $20 for an oil change and a few quarts of atf and not a engine rebuild
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