I have been following this thread on the digest and have a question that arises
out of my own ignorance. I can understand that excess pressure would force oil
out of seals that do not fully seal. This will result in no oil leaks and
aesthetically I think that that would be good. However, it seems to me that
negative pressure could introduce a reverse flow into the engine that could
allow for the introduction of other contaminants that would not ordinarily be
introduced, and that may not be burned off timely. Moisture comes to mind that
may increase humidity and condensation in the engine after shutdown. It seems
to me that airborne contaminants would flow through much easier than viscous
oil. Obviously, this is well understood by the professionals, but is the
negative pressure so slight that there is no reverse flow to the system and how
is this regulated? Or is this simply not a factor? I am certain that I will
stick with my system of anti-corrosion oil coverage and!
parking on a piece of cardboard in the garage to simplify clean-up, but I am
curious if this system results in earlier breakdown of oil components. As
always, thanks in advance for the enlightenment.
David Gill
1976 TR6
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