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What is the best was to quiet lifter noise on a 1991 Jeep Wrangler with a 4.0 engine?


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2008-05-08 16:06:49
2008-05-08 16:06:49

My '91 has a new engine, but they used the old head without a rebuild. I had some lifter noise, which is normal with the 4.0. Recently it became a little noisier, and I drained a pint of oil, replacing it with a pint of Marvel Mystery Oil. Within 30 miles it was much quieter. From what I understand, MMO has solvents that clean out the gunk that cleans out the passageways in the lifters allowing them to maintain pressure. I would bet that almost any lifter solvent/cleaner would do the same thing. I use MMO because it's worked for me before.

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Is this coming from the engine? If it is it sounds like you might have some lifter problems. Or the worse part is if you have a rod knocking. Intrepids did have some egine problems.

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Yes it can, but try to isolate the sound by using some thicker weight oil and/or oil additive like lucas to quiet the ticking lifter. If the noise doesn't change it's probably an exhaust leak, if it quiets down you might have a collapsed lifter.

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ticking noise is usually "lifter noise". if this noise increases in speed when accelerating then it is "lifter noise". just change your oil.and or maitain proper oil level.try using a medium to thick oil 20/30 20/50 , there is a product call lucas which also helps your oil lubricate the engines moving parts easier. i have use it, and it works , it takes a few miles but it works.

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Quiet means without noise.

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As in no noise? You spelt it rightquiet


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