Duff headers leaks?


BII302

15+ Year Member

Joined
Feb 20, 2008
Messages
11
Points
3,101
City
Coos Bay, OR.
Vehicle Year
1984
Transmission
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:
 
Last edited:
The headers arnt warped or anything? and the studs are ok?
 
check the header flange with a staight edge,have them milled flat if necessary
 
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!
 
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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