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Duff headers leaks?


BII302

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1984
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302
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Automatic
I bought a set of James Duff header for my 302 powered Bronco II a couple of years ago, when they first came out with the ceramic coated ones. I finally got around to pulling my motor to do a little work on it. Turned out the center crank bearing was completely shot and had ruined the crank and block.:pissedoff: Now I have a new motor.:headbang: Anyway back to the headers, I have bad exhaust leaks on both sides near the back, when I first put them on I use some soft copper gaskets, I already pulled the starter side off and put in the white asbestos type that Duff sent with the headers. Still have bad leaks, does anybody have any suggestions?:dunno:
 
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RangeRunner

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The headers arnt warped or anything? and the studs are ok?
 

rickcdewitt

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check the header flange with a staight edge,have them milled flat if necessary
 

PreRunner Ranger

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You should try some 'permatex' high-temp copper silicone, I used it one my exhuast when it was leaking from the downpipe to the muffler, and never had a problem since!
 

khooper

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A new gasket would do but make sure it's a copper gasket.. Copper gaskets provide a better seal but are a little more expensive
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