exhaust manifold sealer

[k92]

Thanks for the responses. The exhaust ports on the heads were already milled,but nothing has been done to the manifolds yet.They are currently at Mcneish's getting refinished and I dont know if getting them cut would somehow damage the coating on them. I'll probably try the copper sealant just in case, hate those pesky exhaust leaks!!

[nuch_ss396]

Contact Jerry M and ask him to put a straight edge across
the flange surfaces. If they are problematic, ask Jerry
to get them fly cut.

Steve, I can't imagine why it cost you that much money to
get the 455 manifolds cut. It's a flat surface and somewhat
easy to indicate for flatness. Then, you just take a light
cut for cleanup. Unless I'm missing something, a skim cut
should be fairly easy to do. I will have that done to my
manifolds before I install them. 30+ years have to account
for a little warping I would expect.

Steve

[L78steve]

Once the jig is fabricated it is simple.But the manifolds have to be firmly held or chatter will occur.This will ruin the cutters and the manifolds.

[elcamino72]

I agree, have Jerry check them. I've gotten them machined in the past at a local shop and I forget what they charged me, but it wasn't much. Now I just trim the gaskets and you really don't see them however on a 1000pt car I would certainly not use gaskets.

[nuch_ss396]

Sounds like the perfect application for a surface grinder,
not a fly cutting operation.

[Charley Lillard]

or a table type belt sander.

[L78steve]

The problem I found with a belt sander is the belt lap joint,every time it comes around it rounds the leading edge of what ever your cutting.