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Odd Tapping can only be heard from inside the car

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Old 01-13-2010, 10:14 AM
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MM951
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Default Odd Tapping can only be heard from inside the car

I have had a tapping that sounds somewhat like a dying lifter that can only be heard from idle to about 1,300 rpm. It has gotten a bit louder recently, but I can only hear it inside the car. If I pop the hood, can't hear anything but injector tick, I can crawl arond all around the car and still not hear it, only inside the cabin with the windows shut. For a time, I thought it was my exhaust/something making contact with something else due to my bad motor mounts, but I replaced them (thanks Van ) and the problem persists. Needless to say, it's worrying me now that I can't pin point it.

Has anyone else had a tapping that could only be heard inside and what did it end up being?

FWIW: I had the cam tower off a few thousand miles ago to replace a dead lifter, the rest seemed fine (firm buttons, clean, soaked in ATF, etc) Oil pressure is normal and unchanged from what it has always been.
Old 01-23-2010, 09:24 PM
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mtccl
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Check the cat converter heat shield
Old 01-25-2010, 10:11 AM
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M758
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Unless it is in in the engine it is very easy for a heat shield to be rattling around causing noise like that.



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