Teflon Coolant seals
#76
good to be back
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i've used the rotary aviation teflon coolant seals (both inner and outer, although i don't think the black outer rings are teflon encapsulated), and i have no complaints. i also used their viton oil control o-rings. the outer rings are a little big, but with some coaxing and some patience they will slip into the groove. just be careful not to tear them.
#77
Displacement > Boost
Join Date: Oct 2002
Location: Mississippi
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Mcmaster-carr also has bare silicone, as opposed to teflon encapsulated silicone O rings. I think I might try these instead. I've used the teflon ones three times now and they always get pinched on the inside edge somewhat, like they are a hair too small. The ones rotary aviation sends with their kits always need to be stretched a little.
So anyhow, I just ordered part number 9396K199, which is AS568A Dash Number 176, 3/32" round red silicone O ring in 9 1/4" inside diameter. It's basically the same cross section as the teflon ones, but one size larger diameter (1/4" larger dia.).
They're $3.19 apiece. I "rebuild" this engine so often due to stupid mistakes that it won't hurt to see if bare silicone will work too. If I could get the square cross section like stock, I'd do that but they don't list any of those.
I'll report back my results, wish me luck!
So anyhow, I just ordered part number 9396K199, which is AS568A Dash Number 176, 3/32" round red silicone O ring in 9 1/4" inside diameter. It's basically the same cross section as the teflon ones, but one size larger diameter (1/4" larger dia.).
They're $3.19 apiece. I "rebuild" this engine so often due to stupid mistakes that it won't hurt to see if bare silicone will work too. If I could get the square cross section like stock, I'd do that but they don't list any of those.
I'll report back my results, wish me luck!
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ZaqAtaq
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09-05-15 08:57 PM