Re: Bad Camshaft Lobe on #5 Exhaust
I would suspect tight lifter bore, perhaps not letting lifter rotate as much as it should. Alternatively, oil galley could be plugged a little. Or perhaps valve is sticking (or bent) causing excess strain on the lobe.
Gotta be one of those. #5 exhaust valve is same as all the others. If you had only wiped one cam, then I might just suspect improper break-in, but for the same lobe to wear down two times in a row, means you gotta problem in there................
Dave F. in Rhode Island
'68 Camaro SS Accel DFI 454 (SOLD - I'm a boring Corvette owner now)
Bought my first big-block Chevy in 1970