Anti-seize on header bolts

[s_wilwerding]

I'm about to install my new exhaust, and have ordered 12 new header bolts (since the existing ones have been on and off a few times). Any issue with using anti-seize on the bolts?

[JFP in PA]

Should not be an issue.

[Wayne 962]

I think it's okay. Anti-seize on exhaust studs works for a while, but I think it does burn off after a while.

-Wayne

[turboflyer]

Use the extra high temp copper compound anti seize if required. Hopefully they will not loosen up. Engine are relatively smooth running. Typically a light coat of oil and torque to spec. I think if I used the anti seize I would want to add the fancy anti back off tabs, not sure the actual name.

[JFP in PA]

The copper compound holds up well; a really slick option would be to use it and find brass replacement nuts, which stay tight but can be easily removed and replaced without any stud damage in the future..............

I think you are refering to Stage Eight fasteners:

[turboflyer]

Originally Posted by JFP in PA

The copper compound holds up well; a really slick option would be to use it and find brass replacement nuts, which stay tight but can be easily removed and replaced without any stud damage in the future..............

I think you are refering to Stage Eight fasteners:

That would be it. Yep copper is used on many aircraft header nut, but metric may be a problem.

[very~worn~944]

I've been using copper anti-seize in the field for 7 years now without fail. I prefer to use new hardware as well but I've never had a properly assembled exhaust system come loose. Makes disassembly down the road much smoother, cause NO one likes a broken exhaust manifold bolt!

[seventythree]

Make sure you use Silicone-free anti-seize compound or you would run the risk of damaging your oxygen sensors.