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Registered
Join Date: Jul 2001
Location: Thunder Bay, ON
Posts: 4,551
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Silicone vs Nitrile Gaskets
I've got a set of the red silicone valve cover gaskets on my car right now and love them - no leaks - no mess - great stuff.
With this in mind, I called a few local suppliers of aircraft parts to hunt down some bulk red silicone material to make up a few gaskets for the sump plate. Well.... to make a long story shorter, 2 different sources mentioned that I would be better off with nitrile as the red silicone is great for high temperatures but not good for use if its in contact with oil or other hydrocarons. Nitrile was the suggested replacement - black 1/16" thick. Any comments from those with experience?
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1970 911E - track / weekend car 1970 911S - under restoration 1986 930 Slant Nose - fun car |
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06-06-2003, 05:03 PM
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Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,522
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Don't the silicone valve cover gaskets meet hot oil?
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"Now, to put a water-cooled engine in the rear and to have a radiator in the front, that's not very intelligent." -Ferry Porsche (PANO, Oct. '73) (I, Paul D. have loved this quote since 1973. It will remain as long as I post here.) |
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06-06-2003, 05:06 PM
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Join Date: Jul 2001
Location: Thunder Bay, ON
Posts: 4,551
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yup - thats sort of the problem. The guys I was talking to sell nothing but gasket material and both were of the opinion the red silicone shouldn't be used in a hydrocarbon environment. My only thought is that Real Gaskets, etc are using a different spec or grade that is happy with oil?
Regards, Andrew M
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1970 911E - track / weekend car 1970 911S - under restoration 1986 930 Slant Nose - fun car |
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06-06-2003, 05:26 PM
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Very interesting . . . . Permatex would probably take issue with that opinion. I used to use permatex as valve cover gaskets on small blocks and pontiac V-8s rather than the cork gaskets that would stick to the heads after getting hot a couple of times, never had a problem.
Go figure. BTW: I have the silicon gaskets too and not a drop of oil from them.
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'94 CMC Firebird Trans Am '86 951 LS1 (C-2) Gone  '77 911 3.2 (C-1) Gone but not forgotten. http://www.pelicanparts.com/MotorCity/marcesq1 http://www.youtube.com/user/958Fan#p/u |
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06-06-2003, 05:45 PM
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1977 Porsche 911s 3.2
951
