Exhaust Studs

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eddiem
Posts: 77
Joined: Sun Oct 14, 2007 12:51 pm
Location: Ireland

Exhaust Studs

Post by eddiem » Fri Oct 16, 2009 9:36 pm

Hello ,
not a DB question,But someone might be good enough to tell me.I want to replace the exhaust studs on my motor bike - suzuki bandit 1200.

These studs are 8 mm x 25 mm,they hold the exhaust headers onto cylinder head.So they get very hot.

Whats the best bolts to use ? Stainless steel or high tensile steel or maybe some other grade ?

Thanks for any advice , Eddie

john1694
Posts: 673
Joined: Mon Jan 12, 2009 11:12 am

RE: Exhaust Studs

Post by john1694 » Sat Oct 17, 2009 12:18 pm

Personally, and without seeing it, I would probably use stainless steel threaded bar and nuts in favour of bolts. Studs are less likely to work loose if properly torqued up, and coated with a high temperature threadlock, as it will most likely be the nuts that loosen, if anything. Bolts, on the other hand, if they work loose will natter the threads in the head to death. Run the nuts on with anti-sieze, or a lower-grade threadlock than the stud/head threads, and probably use spring washers to prevent vibrating loose.
It is good practice, whenever you use SS fasteners, to always coat the threads with anti-sieze or locktite, as SS threads have an annoying habit of "picking up" and locking solid even before they are properly tight against the component.
Hope that helps.

eddiem
Posts: 77
Joined: Sun Oct 14, 2007 12:51 pm
Location: Ireland

RE: Exhaust Studs

Post by eddiem » Sat Oct 17, 2009 10:37 pm

Yes that helps a lot , thank you.

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