Frozen 2” Heat Riser Valve - The Supercar Registry

04-16-2012, 12:59 AM

moxie

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Join Date: Mar 2012

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Frozen 2” Heat Riser Valve

What is the trick to keeping these valves from freezing up. I removed it, sand blasted it and had it swinging up and down with ease. One month later, froze up. Even Purchased a reproduction and it did the same thing. And no, the gasket or exhaust pipe is NOT rubbing. My car is a 1962 chevy with a stock 327 engine.

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