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Oops! Camshaft [journals and lobes] are ground AFTER heat treatment. Do it the other way and you could end up with a nasty distortion.
Just being picky... but that's me! /ubbthreads/images/graemlins/wink.gif[Ex universal grinder/toolmaker]
Cheers! Roger S.
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Well, sometimes there's a 'green' (preheat-treat) grind, and a hard grind on rotatives. I'd suspect this to be the case given the eccentric and non-uniform cross section nature of the cams.
I can't ever remember hearing of a roller cam failing, but if you're in there for a complete rebuild, it'd me worth it (at least to me) just for the security to replace the lifters. But that's just my $.02
Daniel
Oops! Camshaft [journals and lobes] are ground AFTER heat treatment. Do it the other way and you could end up with a nasty distortion.
Just being picky... but that's me! /ubbthreads/images/graemlins/wink.gif[Ex universal grinder/toolmaker]
Cheers! Roger S.
[/ QUOTE ]
Well, sometimes there's a 'green' (preheat-treat) grind, and a hard grind on rotatives. I'd suspect this to be the case given the eccentric and non-uniform cross section nature of the cams.
I can't ever remember hearing of a roller cam failing, but if you're in there for a complete rebuild, it'd me worth it (at least to me) just for the security to replace the lifters. But that's just my $.02
Daniel
