Hey folks,  I've been reading some of the threads concerning the
Teflon-Encapsulated
Silicone o-rings (TES) and was wondering what the general consensus

was

with

the use
of these o-rings in an oil-filled environment such as for crankcase

blow-by

sealing &
prevention, etc.  Does anyone know if these bad boys are completely
oil-proof over a
very long period of time or are they like typical silicone products

that

are

merely "resistant"
and turn into jelly in an oil environment?

Thanks,

B

The teflon coating makes them almost impervious to all known

chemicals.

These are absolutely the best you can get for almost all applications.
IMHO they are a major durability breakthrough in regard to inadvertent
overheating of the rotary both water and oil.

Paul Lamar

I have to agree with Paul Lamar....I used to make and sell hydraulic

hoses,

and after a lot of research through the technical manuals from the Gates
Rubber Company, I found that teflon was both the most durable, and
impervious to almost any chemicals except freon. (The freon molecules

are so

small that they can permeate the teflon). Teflon is an excellent choice

for

oil over the long term.  Just my w cents worth. Paul Conner, Mobile,

AL--

"Brian D. Cain" wrote:

Good deal.  Thanks for the comments, guys.  I've been doing a bit of
research
here on this stuff and am at another question -- If these TES o-rings are
impervious to just about everything we can throw at them in an engine
environment,
are they re-usable?  In other words, what's the longevity of these o-rings?
Have
they been around long enough to have real, empirical data to prove that
they'll
last the life of an engine and perhaps even longer in the sense that they
can be
re-used barring serious engine failure?

I'm looking into ordering several different sizes and kinds of o-rings to
perhaps
build a 13BT o-ring kit for the auto guys.  This is very, very interesting
as I'm
a believer in reliability as being the undergirding of real performance.

B

Hayes Rotary Engineering claims you can reuse the TES O-rings.

Paul Lamar

The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2002 All world wide rights reserved.