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Old 08-11-2012, 02:37 PM
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gmtech1 gmtech1 is offline
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Re: Tapping/Knocking Noise

May have a lifter sticking then. If thats the case, not much you can do other than have them replaced. If it's a knocking (deep sounding) noise from the bottom of the eng, then most likley a main bearing. But, since you said it comes and goes, I'm thinking a lifter.
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