Re: Tappet Clearance Tool J-4540? Valve Guide Driver J-2577?

Posted by John On 2020/7/18 21:20:29
Never figured just how hydraulic lifters work on flat head engines. On OHV, usually the hydraulic lifter is pre loaded by the adjustment at the rock arm.
Seems on a flat head with no adjustment the valve spring tension would be the most critical part of having the correct preload on the hydraulic tappet.

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