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Old 09-12-2017, 02:17 PM   #3
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Join Date: Jun 2017
Location: Cherryville, NC
Posts: 874
Re: Any idea on what this knocking is 72 C20 350

Either a rocker stud has pulled out of a head or the rocker has come loose...just pop off the rocker covers and the issue will be obvious...

Doesnt sound deep enough to be a bearing...

Good luck
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