I have a 477 gas engine IT backfires through valve cover 2 and4 cy have no builds upcompression is the intake or exhaust valves bent or sticking or cylinder damage compression builds up and blows the valve cover cap off any suggestions greatly app thanks
__________________ FERGUSON'S GARAGE est. 1967 car , truck , heavy equiptment repairs 4 X 4 specialists PORTABLE WELDING SERVICE TOWING New @ used PARTS 1981 L 800 460 5 speed , 2 speed rear 1957 F 600 390 5 speed
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