DennyB is right. I had that happen to an exhaust rocker on my vette. It was like someone was hitting the crank with a hammer and blowing back up the intake when the intake valve opened.
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66 Chevy C30 Stakebody Dump, PS,PB, 327cu in
71 Corvette Coupe 454 4 speed
79 Chevy 4X4 (Tom's old truck)
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66 Chevy C30 Stakebody Dump, PS,PB, 327cu in
71 Corvette Coupe 454 4 speed
69 Chevy C20 Custom Camper
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