<VV> Viton crank seals

[Rick Norris]

Interesting...
I have been using the Viton seals on all my race engines and street builds 
with no problems. As Clark said, I always lube them well.
Rick Norris
#36 Sunoco Corvair
www.corvairalley.com

>I have read but can't recall where, that Viton is NOT good for dynamic
> sealing. My experience confrms this re bell housing seals. I will not use
> them in the future for either end of crankshaft.
>
> Chuck S
> BBRT
> Fredericksburg, VA
> ----- Original Message ----- 
> From: "kevin nash" >>
>>>
>>> Over at the Corvair Forum, members have had problems with the Viton main
>>> crankshaft seals, while one major Corvair shop has used Viton crank 
>>> seals
>>> for
>>>  years and never had a problem or failure.
>>>
>>> What are your experiences with these seals?
>>>
>>> Regards,
>>> Bob Helt
>>>
>> Bob-I've used both Polyacrilate seals and Viton seals on both the
>> bellhousing and balancer end- both types of materials leaked on the
>> bellhousing end, neitherleaked on the balancer end. I've used the same
>> crank and crank gear for the various seals, as the seal surface has 
>> always
>> looked "perfect" to me. I had absolutelyno bellhousing leaks before I'd
>> rebuilt the engine, but after rebuilding, it leaks, and the seal material
>> choice hasnt made any difference at all! Probably, in my case,the
>> difference between it leaking and not leaking was that when I did the
>> re-build, I polished the seal surface, and did not get the surface finish
>> correct. Next timeI get in there to deal with that seal I'm going to put 
>> a
>> oil slinger on the crank shoulder (as is shown in some early corvair shop
>> manuals), plus a seal sleeve.There should not be anymore reasons for that
>> seal to leak, no matter what seal I use!Kevin Nash63 Spyder, daily driver
>> _______________________________________________
>
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