Rick, If your rebuilding your engine with new tappets or cam, you need to
follow the manufacture's recommendation on break in procedures. This seems
to entail mineral break in oil that contains the adequate chemical
formulations for ensuring proper hardness.
For example, you might note Crane says the first 20 minutes is the critical
period, they then recommend (not require) mineral oil for the first 5000 miles
before switching to synthetic. (no where do they say a ZDDP additive is
required)
CRANE FLAT TAPPET CAMSHAFT RECOMMENDED BREAK-IN PROCEDURE
Due to the EPAs mandate for zinc removal from most motor oils, proper flat
tappet camshaft break-in procedure
is more critical than ever before. This is true for both hydraulic and
mechanical flat tappet Camshafts. As a point of
interest, the most critical time in the life of a flat tappet camshaft is the
first 20 minutes of break-in during which the
bottoms of the tappets mate-in with the cam lobes.
There are some oils with additive packages that are better for camshaft
break-in. These include, but are not limited
to: (Brad Penn or Maxima) or a race only petroleum- based oil and include
Crane Cams Part # 99003-1
Super Lube additive. Do not use API rated SL or SM oil
______________________________________________
Mg-t@autox.team.net
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