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Originally Posted by boneheaddoctor
I've done the air hold route on two engines doing valve springs and seals...but I would change what you said...air hold should be done at TDC...and car in gear...(manual trans) or block the engine in some manner.
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Holding 185 psi at tdc is like playing Russian roulette with all chambers loaded.
You ain't gonna loose a valve at that pressure....
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