i have searched the forum and havn't come across the correct answer yet, while removing my header to paint it black, two of the studs have broken off. my question is does anyone know the thread pitch of the nuts and studs that connect the cylinder head to the exhaust manifold/header i would like to source these from my local autoparts store since they are 2 weeks out if i have to order them from my honda parts supplier catalog shows them as a 7mm but doesnt not define the pitch to 7x1.00 or 7x1.25 etc

any help would be greatly appreciated. thank you in advance

 

Im sorry to hear that and I that i don't know your info. But you can take the bolt or if you still have the old nut,to a hardware store like home depot; they will be able to measure it for you. Good luck.

 

thanks for the reply, the two nuts and studs i have do not have measurable threads left on them or i would, and i don't want to risk pulling another stud out to measure in case it were to break

 

With the investment you've got in your ride, I'd recommend replacing them all. They are cheap enough, and if two broke already,
they've probably all been over-torqued and/or tightened out-of-sequence.

If you soak them good, with break-free, and then, maybe, a touch of heat, I bet you can spin them loose.

I won't swear, but I think the pitch is different, on each end, coarse for engine, fine for header plate nut.

Good luck, Ern