Senior Tech Team
Join Date: Aug 2002
Location: Gold Canyon, AZ
Re: Interesting valve failure
My guess is that the lifters were being "tossed" at full open, caused by the lifter not following the cam lobe as result of too high RPM range and/or wrong valve springs. When this happens, the valve tends to bounce off the seat as it closes resulting in valve and/or valve seat failure.
64 Chevelle Malibu Sport Coupe (original owner) car now has 427" BB, Jerico 5-spd. trans., Dana 60 rear end.
SAE Member (25+ years)
ASE Master Certified Engine Machinist
AERA Certified Professional Engine Machinist