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Reader Question: My 2006 Jeep Rubicon 4.0 L engine has a slight knock – not a compression knock. More like a clicking sound, bur its getting louder.

Have you heard from anyone else who has had this same problem? My dealer tells me its normal engine noise. I have had 6 Jeeps with the 4.0 L engine and have never had this problem.

Any help you can give me would be greatly appreciated.

Ken

Hi Ken,

No, I am not aware of this issue with any of my client’s vehicles. If this clicking noise is in the upper engine area, like under the valve cover I would suggest you try a can of Marvel Mystery Oil additive which you can buy at any auto parts store.

Just add the can of additive to your clean engine oil. It is great for quieting noising valve train complaints. It is safe to use and if it helps, you should use it with every oil change.

Blessings,
Austin Davis

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