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Re: # 7 Misfire and intake valve hits the piston
Posted to Technical Discussion Forum on 3/17/2020

Nello,

The early 5.7 Vortec engines had the same problem years ago. The intake valve guides were too tight from the factory and when the engines were used under heavy load the valves would tighten up and cause a misfire. The local dealer actually sent us som... Login to read more.