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black rtv on water pump

11348 Views 12 Replies 4 Participants Last post by  BLUEMEANIE
i used GE silicone II Gasket and Seal (black) on my water pump o ring. i understand blue permatex is generally what's used here. is there gonna be a problem or is the antifreeze gonna break down that silicone?

also is the GE silicone II Gasket and Seal oxygen sensor safe/low volitility?
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· Premium Member
'91 MR2 Turbo
19,106 Posts
The O-ring does most of the sealing. But my BGB DOES NOT mention using a sealant on the O-ring.
The water pump on the 5sfe and 3sgte are identical. WhenI did my rebuild, I did not use a sealant on the O-ring, but I did use the gray permatex on the gasket where it mates to the block.
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