Exhaust Flange rough !

[Rbob]

Exhaust manifold to head looks good, however the flange to exhaust pipe is not pretty.

Took it to my machine shop and they don"t have a way to clamp / fixture the manifold to do this.....

I may post a pic but you get the idea,

Any ideas???

 

[67Dart273]

Photos would help. Years and years ago, I used hi temp silicone on headers with good results. Might even be somethin' better nowadays.

 

[RustyRatRod]

Blast it and fill the pits in with JB Weld.

 

[ntsqd]

Manifold gasket surface at the head-pipe? Some machine shops have what amounts to being a really big belt sander. They're frequently used to resurface the head side of exhaust manifolds and both sets of flanges on attached intake/exhaust manifolds, like used on the /6's, so that they stay the same thickness.

Failing that clamp it in a vise and try a bodywork type long board with 36 grit. Be careful to not alter the angle of the flange and to keep it flat.

 

[RedFish]

Could you change to a donut gasket type assembly ?

 

[1968FormulaS340]

Blast it and fill the pits in with JB Weld.

This should work and it's a DIY job.

 

[ntsqd]

I've no hope that JB-Weld is a long term fix for that kind of heat.