Thread: 300Tdi manifold studs and nuts - can they be lubricated to prevent rusting?

I wouldn't worry about them, they heat up and therefor rust. Use some copper anti-seize is about all you can do.

copper nuts?
I read that to help removal in the years ahead(eg. if a gasket fails or something) copper nuts can help a lot.

Recommend you don't use anything lower quality than grade 8 nuts, and put copper slip or nickel antisieze on them, stops them from binding up and provides some corrosion protection to the exposed threads.


You'll never have a problem getting them off if you use nickel based antisieze, its widely used in industry on big engines and turbines for high temp threads etc.

Just be aware to reduce the torque by 1/3 when you use the anti sieze, ie you use 66 % of the torque for a normally oil lubed bolt , other wise you can over stress the stud.

I don't think copper /brass/bronze will be strong enough at elevated temperatures and will be a head ache for you.

cheers simmo