exhaust leaks EVERYWHERE!

[Dirtkid93]

I drove my truck 14 miles to EDC las vegas (: awesome right? no... right as i got there my exhaust manifold gasket blew, my flange gasket blew, and probably something else. i stayed at edc until 5 in the morning, after listening to blasting music for 7 hours the sound of open headers didn't bother me, but sure bothered my neighbor driving into the neighborhood at 6 in the morning.. okay enough BS

i replaced both gaskets, tightened them to proper torque setting and it still sounds like its running open, i felt for leaks, flange was still leaking, replaced it again and had same issue, got fed up and put that rubber-steel ( similar to jb weld ) on my flange, ( bringing it to exhaust shop and they can deal with it (: ) still can't get manifold to stop leaking, i checked both surfaces, perfectly flat and crack free. any suggestions?

[66Submarine]

I didn't have any idea what "EDC" was, so I googled it; seems like people die there pretty regularly!

When you say

the sound of open headers didn't bother me

do you mean you have tube headers, or the factory cast manifold? (I also don't think I'd call a blown out gasket as loud as something with nothing after the headers/manifold!)

Assuming you have the factory manifolds; are the intake and exhaust lined up where they bolt together? I've heard of some people having trouble where they were misaligned and that caused a leak, but besides that I don't see why you would be having problems if both the surfaces are true and they are torqued down like they should be.

A common "fix" would be a little bit of high-temp (red) silicone or similar, but I really don't think you should need to do that if everything is good.

[Dirtkid93]

Originally Posted by 66Submarine

I didn't have any idea what "EDC" was, so I googled it; seems like people die there pretty regularly!

When you say do you mean you have tube headers, or the factory cast manifold? (I also don't think I'd call a blown out gasket as loud as something with nothing after the headers/manifold!)

Assuming you have the factory manifolds; are the intake and exhaust lined up where they bolt together? I've heard of some people having trouble where they were misaligned and that caused a leak, but besides that I don't see why you would be having problems if both the surfaces are true and they are torqued down like they should be.

A common "fix" would be a little bit of high-temp (red) silicone or similar, but I really don't think you should need to do that if everything is good.

so decided that the 230 I6 is now going, i found a 305 sbc from an 86' monte carlo, will it bolt right in?

[66Submarine]

Well, (as said before) it's an SBC, so yes. BTW; 1986 should also be a one-piece rear main seal, FWIW.