Re: Advice on Studs for Exhaust Manifold ? 4 Questions . . . - Saabnet.com Bulletin Board
Without any experience with broken exhaust studs, but speaking generally
The long spacers between the exhaust manifold and the bolts are designed to allow the studs to accommodate the (lateral) differential thermal expansion between the (sometimes) red hot manifold and the water cooled head. it also allows the stud to accommodate the manifold expansion without stressing the (screwed into the water cooled heads) studs beyond their elastic limit. Fatigue shouldn't be too much of an issue as the stress never reverses.
Mechanical design is probably more important than material selection here
posted by 98.28.165...
Posts in this Thread:
Post a Followup
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
This is a moderated bulletin board - Posting is a privilege, not a right.
Unsolicited commercial postings are not allowed (no Spam). Please, no For Sale or Wanted postings, SERIOUSLY.
Classifieds are to be listed in The Saab Network Classifieds pages.
This is a problem solving forum for over 250,000 Saab owners, so expect to see
problems discussed here even though our cars are generally very reliable. This is not an anything goes
type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the
Saabnet.com Mission and Purpose Page. Please remember that you are
not anonymous. Site Contact | Site Donations | Other Sites by SP -
Your address is: 188.8.131.52 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.
Site Members do not see red text instructions, skyscraper, nor box ads.
Click here to see all
the Site Membership Benefits!