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Old 04-09-2010, 06:33 PM
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Cork vs. Rubber

Hi All. I don't consider myself to be a hot rodder, per se. I'm more of a "customizer". I like modifying my vehicles to suit my personality. Living on Long Island, there aren't many places to drive fast safely, so I like doing work on less popular engines, four and six bangers. In the past whenever I've changed valve covers, I've used cork gaskets, because thart was all that was available for my applications. I'm currently working on a '94 S10 witth a 4.3 liter V6. I scored some chrome vavle covers and when I went to my local parts house and asked for a new set of gaskets, the counter person asked me, " Cork or Rubber?" I like cork because it will make a good seal, and when torqued to the right setting, they don't have to be replaced everytime they're least that's what I always thought, now I'm wondering, what are the advantages/drawbacks of the cork over rubber gaskets?


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Old 04-09-2010, 06:38 PM
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cork dries out behind the counter.. it makes a good gasket and I like it also. but if a gasket has been on the shelf a long time, it will be hard to work with..
Rubber is reusable
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Old 04-09-2010, 06:42 PM
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Cork, as mentioned dries out. However, you can coat them in vaseline and work it into the cork gasket, and it`ll last three times as long than it would uncoated. The vaseline keeps the moisture in the gasket far longer.
However, rubber gaskets, as long as they aren`t torn can just about be reused forever. I`ve reused the same 1 piece oil pan rubber gasket 3 times now and it still doesn`t leak.
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