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Mystery flathead tapping noise, suggestions?
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03-13-2011, 07:41 PM
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Mike51Merc
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Join Date: May 2010
Location: Northeast Pennsylvania
Posts: 1,582
Re: Mystery flathead tapping noise, suggestions?
Sounds like it could be too much lifter clearance. If you have Johnson style adjustable lifters, sometimes the adjustment bolts loose their grip and turn, leaving too much valve clearance.
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