: -------------- Hey Guys, Enough already! I'm with Dave on this TES O ring business, but I'm even MORE radical ... If the factory O rings were good enough to win Le Mans 24 Hr, it would seem that they SHOULD be good enough for our purposes. Moreover, they seem to last 20 odd years and over 500,000 km in cars that are well looked after and serviced regularly and the cooling systems kept clean. The only time I've EVER seen Factory O rings fail (since the mid '70s) is if the engine has been "cooked", (and then the rotor housings are warped), or the rotor housings have corroded (due to lack of a regular coolant changes), and in both these failure modes, the rotor housings are throw-aways anyhow. Not the O ring's fault that the engine leaks water - OIF (Operator Induced Failure). So seriously, can someone PLEASE tell me WHY you all want to use TES O rings instead of the factory ones?? Apart from price, (which seems to be an issue with some), and the fact that the big bearded guy at that "other" place says you should - so why don't you guys just ask HIM for the relevant part # - he knows EVERYTHING). Still, for the life of me, I just can't see what technical advantages there are (apart from busting the O ring grooves if you happen to get the sizing wrong). I'm afraid that it has totally escaped me. Cheers, Leon --NextPart_Webmail_9m3u9jl4l_11187_1122215870_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Leon and all,

For my part I just like the fact that the TES seals will take more heat

and pressure and reportedly are reusable if undamaged.........Anything

I can do economically to upgrade my 13B to extend its life for use at

power levels (75 to 100 percent) it was not probably not designed for

I am willing to do........After all it is our butts we are putting in these

airplanes........IMHO.........That being said I do appreciate the opinions

of all in the group !!

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from "Leon Promet" <leonp@pacific.net.au>: --------------

Hey Guys,

Enough already! I'm with Dave on this TES O ring business, but I'm even MORE radical ...

If the factory O rings were good enough to win Le Mans 24 Hr, it would seem that they SHOULD be good enough for our purposes. Moreover, they seem to last 20 odd years and over 500,000 km in cars that are well looked after and serviced regularly and the cooling systems kept clean.

The only time I've EVER seen Factory O rings fail (since the mid '70s) is if the engine has been "cooked", (and then the rotor housings are warped), or the rotor housings have corroded (due to lack of a regular coolant changes), and in both these failure modes, the rotor housings are throw-aways anyhow. Not the O ring's fault that the engine leaks water - OIF (Operator Induced Failure).

So seriously, can someone PLEASE tell me WHY you all want to use TES O rings instead of the factory ones?? Apart from price, (which seems to be an issue with some), and the fact that the big bearded guy at that "other" place says you should - so why don't you guys just ask HIM for the relevant part # - he knows EVERYTHING).

Still, for the life of me, I just can't see what technical advantages there are (apart from busting the O ring grooves if you happen to get the sizing wrong). I'm afraid that it has totally escaped me.

Cheers,

Leon

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