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Old 06-28-2021, 12:58 PM   #23
Patrick L.
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Join Date: May 2010
Location: Largo Florida
Posts: 7,225
Default Re: Mystery Engine Knock

It was an intake valve, so the problem has been fixed ?

I don't think you'll find a hone that small, but, you can find a reamer.

I've loosened them up using grinding compound.

Most of the time the valve is fitted OK, maybe a tad tight, and will start hanging up because of 'crud' [ technical term] usually from sitting around not being used.
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