Question about 1988 Jeep Cherokee

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1988 Cherokee ticking

My Jeep is ticking under the hood. We originally thought it was a lifter but after a mechanic replaced the lifters, the injector o-rings, the gaskets and the plugs....the tick is still there. It is a shallow tick that isn't there when idling but when the gas is pressed. It is quite loud when it does tick. The first time I went through this, the ticking was consistently occurring when I was accelerating then a second tick kicked in which was much louder and was ticking all of the time. Now, after replacing the parts noted above I am back to the original tick. Please help me. I waited 4 months to have enough money to pay a mechanic and now the problem is still there but I'm broke.

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  • sidmcgyver Jan 26, 2009

    The mechanic did the work onsite. I was able to look at the pursh rods and the rocker arms and they looked fine. I didn't see anything that resemble wear or damage. When I originally talked to him, I told him that I thought it sounded like a push rod or the lifter but everyone said it was the lifters. When he had it taken apart here and left, I was able to take a look.

  • sidmcgyver Jan 30, 2009

    It is a 4.0 straight 6. Yesterday, I pulled the oil pan to see what was up. Everything looked as it should. I popped the valve covers and there wasn't any indications that lifter was in wrong or not replaced. The ticking that started all of this was shallow and towards the firewall under the valve cover indicating bad lifter. The noise that remains is exactly the same in exactly the same location. Is it possible that there could be one lifter that isn't getting oil to it?

  • Mike Butler
    Mike Butler May 11, 2010

    Anyone put a straight edge across valve stems? How about dial gauge, or similar to check cam lobes for excessive wear ? What's the actual oil pressure, at idle & highway speeds? Try running engine & pull that plug wire off & see if any change in ticking noise.

  • Mike Butler
    Mike Butler May 11, 2010

    What engine do you have in that vehicle?

  • Richard Delahant May 11, 2010

    Check back with the mechanic and find out if he checked the push rods and rocker arms for wear.

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I had this with my old yj engine take the valve cover off and use a hammer or rod to press down on the rocker arm while running to find the noisy lifter. Also use the wire method as someone else rec. Check the rod bearings also. Mine ended up being the wrist pin in the number 6 cylinder after taking down the trans and removing the head 2 times hope this helps.

Posted on Jan 30, 2009

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