Block Hugger Header Gasket Problems

[50 F1]

Finally got my Model A out after 15 years of sitting. When I put it away back then I had a collector leak and I had bought these copper gaskets that were suppose to work good for leaks. The kit came with 2 copper gaskets and 2 hard fiber like gaskets that  almost feels like aluminum. My question is does it matter where I put the gaskets? Copper on top and fiber on bottom or the other way around. I don't remember getting any info with the gaskets. Any info or advise would be great. Years ago when I drove the car I always had collector leaks.

350 Chevy

Thanks Mike

[ragdol]

I don't use any gaskets at the manifold if the headers are good. Don't have any problems with bolts loosening either. The donuts are scintered metal & will conform to your exhaust pipe when tightened. Shouldn't have any leaks if everything lines up properly.

[chimp koose]

collector leaks often occur when the collector bolts are overtightened causing the flanges to bend . Check to make sure your flanges are flat . then I would put the copper gaskets to the outside with that aluminum piece between them

[chimp koose]

re read your post  , you have one of each. Have you tried ultra copper silicone in there ? I have found it to work well .

[50 F1]

Thanks for the info.  Should I put a bead of the ultra copper sealer around all the mating surfaces and let it dry or skin up and put it together with the copper gaskets?

[chimp koose]

I really don't remember  ,but I think I would assemble it wet and let it cure assembled . You will have a time of it trying to dis assemble it if done this way .

[papastoyss]

My procedure is to clean both surfaces w/ laquer thinner, assemble & finger tighten the bolts, let the silicone cure overnight & final tighten bolts the next day. I've even had SBC valve covers not leak using this procedure!!