Ok guys Ive had a rash of bad luck first I found my rear brake issues and that is in work.

But upon backing the car into garage somehow over the winter I lost some ground clearance going into garage and dented the passenger header pretty bad, I knew I had a slight exhaust leak so Figured what better time to fix it while I wait on brake parts.

I replaced collector gasket 3 times
1st time single Mr. Gasket paper
2nd time double Mr. Gasket paper
3rd time aluminum Mr.gasket
Sealed up Now

Header flange gasket on my second attempt
First time used a double header gasket and exhaust manifold doubled up.. (has worked before for me)
Now Used single Mr. gasket

Things Ive tried thought maybe I had light valve chatter.
Adjusted to 3/4 of a turn past zero lash/stop ticking engine hot.

Used mechanical stethoscope no noise in valve train, nothing at timing cover, no noise at fuel pump, no noise in lower end, no noise at starter, no noise at flywheel

Here is two videos attached in the second video you can see the header damage.

http://s864.photobucket.com/user/mlowe6417/media/20150226_170836_zpsrj9a6wh3.mp4.html
http://s864.photobucket.com/user/mlowe6417/media/20150226_171137_zpsxhb4phlp.mp4.html
Now my question is could this be a actual valve seat making noise, I used the stethoscope on the actual header pipe and there is a definite difference in bent header and non bent header or just a exhaust leak going to drive me nuts

 

Do you still have injectors from smog pump into exhaust manifolds?
Thought I had valve tick, turned out to be crack in tubing.
Good luck

 

It has hedman headers into duals, no smog pump either

 

I took the header off, filed the high spots and it was warped bad enough to slide a quarter under center siamese ports so I did the unthinkable.
I grabbed my trusty sawsall and cut the flange to let it independently tightened down to each cylinder.

Now this did help slight leak still there, but I sprayed water where the pipes actually go into the flange and it sucked the water into the header while running. So I know this is exhaust related so I'm a bit relieved.
Now I either pull the header off and see if a shop can maybe cut and reweld the flanges or order a new set.

Ideas?

 

Ok guys, I had a buddy weld the backside of the flanges that was leaking and ordered a set of Remflex gaskets and no more leaks