Re: valve cover gasket issue


"larry moe 'n curly" <larrymoencurly@xxxxxxxxxxx> wrote in message
news:7c18bf09-3486-4232-8db9-efb1dc5b0799@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


Ray O wrote:

By the way, if the valve cover uses formed-in-place gasket (FIPG), do not
use silicone on the valve cover! Use only FIPG products that are listed
as
safe for O-2 sensors. If the valve cover uses a regular gasket, do not
try
to make one out of FIPG as it will almost always leak.

Is FIPG that O2-sensor-safe silicone sealer, or is it an entirely
different type of material? I've heard of a FIPG material that
changes from solid to liquid when the gasket is tightened (and I do
mean solid to liquid, not the other way around) but back to solid when
the pieces are disassembled, and supposedly it can be reused 8-10
times. I wish I could find some, just to see what it's like. Have you
ever heard of such an animal?

The Ford dealer replaced my leaky rubber oil pan gasket with RTV
silicone sealer during the first year or two, and right away the oil
turned opaque green. They said it was normal and wouldn't hurt the O2
sensor.

"FIPG" is an acronym for formed in place gaskets. FIPG is made of different
materials, depending on the application. Silicone might be used to seal a
plastic case for water resistance, while the stuff used for oil pan gaskets
is something else.

AFAIK, Toyota valve covers generally have a rubber-neoprene gasket and do
not use FIPG for the valve cover.
--

Ray O
(correct punctuation to reply)


.

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