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Old 03-25-2009
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Exhaust gasket material?

Looking for a recommendation for high-temp exhaust gasket material for an old, funky set-up on my 1972 NorthStar. The exhaust connection is a flange-fitting, 5" outter diameter flange around a 2" diameter ID, secured by 4 thru-bolts, dry. Not wet exhaust. Water meets up with the exhaust right near the exit thruhull. This flange connection is after the exhaust's heat exchanger, so it's not as hot as the exhaust gas is when it exits the engine, but still very hot...would estimate it needs to withstand 400f or so. Suggestions on material to make my own gasket to go between the 2 halves of the flange fitting?

And please don't tell me to re-engineer the whole set-up. It's March.
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Old 03-25-2009
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Permatex used to make an exaust gasket sealer with a copper based if memory serves, should be able to get it at any auto parts store. Barring that you could try finding some copper and cutting a gasket. Or make a pattern with some paper and take it into the autoparts store and see what they can find. I'd recomend napa over discount auto, it still run the old way.
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Asbestos sheets are the most common, but you might find impossible to find it in your market as its distribution (not production) has been banned for years now. Today some material are almost there like wollastonite, permatex, aramida, politetrafluoretileno. I'd change the entire system .....
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Old 03-28-2009
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Thanks for the offer to change the entire system. Can you get it done before I launch in 3 weeks?
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Old 03-28-2009
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Amazon.com: Mr. Gasket 5961 Ultra Seal Exhaust Gasket Material: Automotive

Search on "exhaust gasket material" and there are many hits. Or, you could contact a company like Felpro and ask them if you can buy a sheet of their material--without it being punched out for a particular application. I'm sure they could set you up with the right stuff, if Mr. Gasket can't give you the right answers.
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Old 03-29-2009
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Got it, through a rule-compliant commercial reference. All set now. Thanks EVERYONE for your replies!
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Old 03-29-2009
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Try this ------

GASKET
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Old 03-29-2009
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Nice. Appreciate the instructions too. Thank you!
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