Cams
- Thread starter lwmcd1
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- Jan 31, 2010
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I have seen excellent quality flat-tappet cams essentially destroyed in 500 miles due to improper break-in/assembly. So although correct hardness is important, the fact that a cam is appropriately hardened doesn't mean it will survive. ALSO, new lifters must be installed. The quickest way to destroy a cam - regardless of hardness, assembly lube and run in procedure - is with lifters having a wear pattern from a different cam. All flat-tappet cam makers require that a new cam be installed with new lifters. Any warranty would be void using old lifters. A new cam running old lifters is about as close to an 'automatic fail' as any rebuild can be. 
A used cam in a different engine is OK - but must have new lifters.
A used cam in a different engine is OK - but must have new lifters.
https://www.ebay.com/itm/NORTON-COM...-ADJUSTERS-PN-06-7546-or-NMT2074/360831815557
What do you think of these cam lifters? I'll be replacing mine to go with the new cam.
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Resurfaced lifters OK?I have seen excellent quality flat-tappet cams essentially destroyed in 500 miles due to improper break-in/assembly. So although correct hardness is important, the fact that a cam is appropriately hardened doesn't mean it will survive. ALSO, new lifters must be installed. The quickest way to destroy a cam - regardless of hardness, assembly lube and run in procedure - is with lifters having a wear pattern from a different cam. All flat-tappet cam makers require that a new cam be installed with new lifters. Any warranty would be void using old lifters. A new cam running old lifters is about as close to an 'automatic fail' as any rebuild can be.
A used cam in a different engine is OK - but must have new lifters.
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Sure, and thanks, I should have said that - if they are resurfaced to the correct (original) profile they are "as new" as far as a cam is concerned.
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