[TR] When to rebuild

[Dave Massey]

 Ah, yes.  We tend to forget the history of engine development.  In the early
days there was the total loss oiling systems.  Then the concept of reusing the
oil was introduced.  This led to oil filtering (bypass filtering).  Then full
flow filtering.  Oil sealing improved in incremental steps in the same manner.
As did our expectations.  The change to leaving drops instead of puddles was
considered a great improvement.  Now we complain about a light oil film on the
exterior of the engine.

But my comments were relevant to lip seals as found in TR6 and other SC
derived engines.




Dave Massey






-----Original Message-----
From: Randall <TR3driver at ca.rr.com>


> The moral of the story is there are two parts to the sealing
> issue, the seal
> and the surface the seal contacts.  Both are important.

Except of course for the original TR2-4A rear main seal; which was a
non-contact design.  Lots of folks dislike it, but at the time the engine
was developed, it was actually an improvement over the "conventional" rear
main seal (which was basically cotton rope back then).

-- Randall