Reply to "rebuild install thrash"

bosswrenchMember

I recommend viton flurocarbon rubber for o-rings that are in contact with hot oil. Even harder to find are pure teflon o-rings. Hardware store o-rings may be neoprene rubber and those will not reliably seal hot oil or fuels.

Also, sealing a boss with a threaded plug normally requires a sized chamfer on the edge of the threaded hole. With a chamfer of the right size, the o-ring is forced into a triangular cross-section that squeezes the o-ring inward against the plug threads as well as tightly against the outer edge of the hole. Without a chamfer, the o-ring will be smashed flat and often splits, again causing leaks.

10/4/151:56 PM

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