Is there any real difference in sealing ability and longevity between Viton or Silicone [2 piece] type rear seals in a performance application ?
Viton has a higher heat rating and twice the price, but are they better ?
Viton or Silicone rear main seals SBC
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Re: Viton or Silicone rear main seals SBC
I have always used silicon rear main seals, with excellent results. Available from many sources, but all are probably manufactured by Fel-Pro.
Bill
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Perfect Circle Doctor of Motors certification
SAE Member (30 years)
ASE Master Certified Engine Machinist (+ two otherASE Master Certifications)
AERA Certified Professional Engine Machinist
Re: Viton or Silicone rear main seals SBC
Viton will not swell or change properties much in the presence of hot engine oils
viton has better low temperature performance, down to like -40*C.
it is far superior to silicone in those 2 areas.
raw material is about 15x the price of a regular VMQ silicone
viton has better low temperature performance, down to like -40*C.
it is far superior to silicone in those 2 areas.
raw material is about 15x the price of a regular VMQ silicone
too lazy to make power w/o boost