Posted by Jon Hagen on March 17, 2009 at 16:34:55 from (12.175.230.56):
In Reply to: new cam 30wt ND oil posted by CWL on March 17, 2009 at 05:32:09:
With the ZDDP and other EP additives being removed from engine oil, this will be a constant problem for engines with flat tappet cams.
Do a good breakin,(1500-2000 rpm immediatly when starting and maintaines in that range for at least the first 30-45 minutes. Make sure you use a good zinc rich diesel oil or racing oil, or add it in the form of GM EOS concentrate. The aftermarket cam companies have a couple of fixes that seem to do well with even the low or no ZDDP emissions oils. One is to laser cut a tiny hole in the lifter base to pressure oil the lifter and cam lobe. Another which requires a totally stripped block as it needs to be cleaned of chips after a tool cuts an oil squirt groove from the lifter oil gallery to the bottom of the lifter bore. It creates an oil squirt groove to oil the lifter and cam lobe with standard lifters installed.
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