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Old July 1st, 2016, 11:00 AM
turbobill turbobill is offline
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Join Date: Feb 2013
Location: northern NY when not flying
Truck: 1968 HM80 with a 478M and a few engines plus a Toro-Flow
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Default Re: Head and rockers.

The "rattling" you hear is probably detonation.

Has nothing to do with the valve adjustment. Excessive lugging, fuel octane, or timing are the likely culprits if the engine isn't running to hot.
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