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#9
02-19-2018, 09:26 AM
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In 50+ years of playing with Pontiac Engines, I personally have seen only one case of a valve head coming off of a valve stem.
This was on Jim Brady's 64 GTO drag car many years ago at a race in Wisconsin. Stock 2 Piece Pontiac Intake Valve. Did a burnout in the water box, can out idled towards the starting line, engine locks up. Turned out the valve head came off, flipped over and just shut the engine off. No major damage to the head or engine. new valve and maybe a Piston, but that was a long time ago. Were these stock sealed power type valves? Some of these places might have had parts on the shelf for 25 years. Tom V.
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