Quote:
Originally Posted by Mark O'Neal
Solid flat tappet cams worked just fine for a hundred years or so.
But no they won't work?
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The problem, of course, is that many have had problems with lifter failures or cam lobes being wiped out with flat tappet cams. There could be a number of factors:
- Modern oils no longer having ZDDP levels that they once had - even if they have other anti-wear additives
- Materials being used may not be as good as they once were
- Proper break-in procedures may not be properly followed
- Any combination or all of the above.
Combine the above with higher lift and spring pressures and the problem is exacerbated.