So one of my middle header bolts fell out and I drove the car for about 10-15km. I think it's a fiberglass gasket. I put the header bolt back in, and it still sounds like an exhaust leak. Did it maybe burn the gasket up while it was loose? Also number one Cyclinder header bolts were loose aswell.

 

I would replace the header bolts when you replace the gasket

 

I already replaced the bolt and it's still ticking

 

you probably burnt the gasket. just replace it. You need to re-torque header bolts after a few heat cycles of initial install......and not a bad idea to check them periodically

 

If you put a bit of teflon tape around the threads they won't back out quite as easily.

 

Use good gaskets (Fel-Pro 1406) and good bolts (ARP) to minimize the problems. The stuff that comes with a set of headers is usually poor quality.

 

Ok thanks guys!

 

Ok I have pacesetter headers and afr heads. They have the mr gasket gaskets which the ports are round and they have the fel pro ones that are square. All 1 1/2". Which do I go with?

 

D-ports.http://www.summitracing.com/parts/fe...-size/5-7l-350

 

The Mr. Gasket CopperSeal are also available in D-port #7154

 

I used a set of Stage 8 locking bolts and never had the problem again....

 

So my local auto parts store ordered me fel pro 1404 gaskets not the 1406, wil they still work?

 

After market headers have to be tightened at least once a year.Got this from a a master mechanic.Hope this helps.

 

1404 are the standard SBC port shape, the 1406 are the D shaped port shape that your engine has. They'll bolt up but I think there will be gasket material sticking into the port. Why not get the right ones?

 

Yea I took the 1404 ones back and got the right ones yesturday! Thanks guys