[Stang1187]

so out of no where i started to hear this loud clacking noise on my driver side

so i thought a rocker might have loosed up so i pulled the cover started the car it was fine. then i checked the plugs normal wear, thennnn

i saw a loose header bolt. so i checked them all and could use some tightening

started my car and i still heard it but just not as loud.

what could it be.?

[heavy metal]

Sounds like you blew a header gasket.

[Stang1187]

that was my next guess bc they get cherry red sometimes

[heavy metal]

When you put the new gaskets on,use some loctite on the bolts.I use the Mr.Gasket Ultraseal gaskets and have had good luck with them.

[Stang1187]

yeah ill try that and see whats up i just have to order the gasket first

[kilog55]

i was told its better to use regular fel-pro manifold gaskets and not to buy header specific gaskets for a better fit and sealing surface.

ill have to swap mine out as i used the ones supplied by BBK junk pressed fiber paper.

but yeah at first i was leaning towards lifter goin by the title

[302Feen]

sounds like it's just a header leak.
Anytime you change to aftermarket headers you'll have to keep an eye on the bolts and make sure they're tightened down. I usually check them every weekend just because.
Before you buy the gaskets I would tighten down all of the bolts first and make sure that's all that's wrong. You need to start in the middle and work your way out. Then warm up the car for about 10 minutes and then repeat the tightening process.

It wouldn't be a bad thing to change header gaskets anyways though...

[EagleAutosports]

Most likely a header gasket leak like the others said. If your tubes have individual flanges you don't have to take them all out like you do with a 1 piece flange.

[MJ91GT]

I had several of my header bolts come out at the track, I just installed the stage 8 kit and a set of aluminum gaskets. The bolts shouldn't back out now and the gaskets should be harder to blow out.

[Stang1187]

well ill pick up a gasket today, but i think it might be the gasket ill repost and let you know

[Stang1187]

so i replaced it and it was the gasket thanks guys!