[General | Members | C900 | 9000 | NG900 & OG93 | 92X | 93 | 95 | NG95 | 97X | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | Books Movies & Music | Chat | FAQs | Gifts | Photos | Classifieds | Polls | Raffle | Sponsors]

C900 Bulletin Board
1979-1993 & 94 Conv
Search:


[Main C900 Bulletin Board | Post Followup | FAQ ] [ Prev by Date ] [ Next by Date ] Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
Re: Stainless sleeves?
Posted by Justin VanAbrahams (more from Justin VanAbrahams) on Wed, 30 May 2012 11:43:03
In Reply to: Stainless sleeves?, Cmyles , Wed, 30 May 2012 11:20:26

I have always wondered about this - virtually no other car in the universe has those sleeves/spacers on its exhaust manifold, and none of them have problems with loosening. I have to wonder if this wasn't Saab's tendency to over-engineer to avoid potential problems rather than something absolutely necessary. Turbos and 4v-per-cylinder heads and mixed alloy/iron engines were all still pretty mysterious in the early '80s. 30 years later, we can look at the decisions they made about the B202T and sometimes say, "Hey, that was some forward thinking!" and sometimes say, "WTF were they thinking?" :) I don't think those sleeves are necessary - my Ford 2.3t, Audi 1.8t, Volvo 2.4t, and GM 2.0t don't have them - but by the same token they certainly don't hurt.

I do think SS fasteners on the exhaust isn't a good idea. I tried that with my Ford 2.3t to address the constant issues with fasteners going through an iron manifold into an iron head, and they all got just as nasty as the factory bits, maybe worse. I think the correct answer is as Simon said. ~Grade 10 studs with plenty of high-temp anti-seize (I use Loctite Copper - there is better, but so far so good) and the correct brass self-locking nuts (eeuro has them). Sadly, the Ford 2.3t doesn't have room for studs (you'd nee to remove the engine to install/remove the manifold!) and I haven't found such a good solution when bolts (vs. studs) are called for.

There are a few expensive alloys out there that may work out (eg A286) and of course there is always titanium. I know several Japanese tuners recommend titanium exhaust hardware for boosted applications, but I have no firsthand experience. $10-$20/bolt is a little tough to swallow in the name of experimentation (to me, anyway). It's going to be a while before I pull the engine from the XR against, but when I do I know I will have to do something - bolts that won't come out really aren't much more fun than bolts that always come out. :)

posted by 12.195.130...

Posts in this Thread:
Members can receive an alert when someone posts in this thread.
Post a Followup

Name:
E-Mail: (Confidential & Secure - Not revealed to other users!)
Send me email when someone posts in this thread: (available to Members)

Subject:

Posting rules are simple - No for sale/wanted ads or live auctions may be here - use the classifieds.
You may not cross-post your message to multiple BBs.
Personal attacks, insults, or flaming are not allowed.
Posting any of this will result in an immediate loss of posting privileges on this site.
Site Members do not see any warning (red) text.

Message:

Optional Link URL: (e.g. http://www.saabnet.com/)
To promote your own Saab site here, you must have a link back to The Saab Network.
Link Title:
Optional Image URL: (e.g. http://www.saabnet.com/img.jpg)




The content on this site may not be republished without permission. Copyright © 1988-2012 - The Saab Network - saabnet.com.

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 Donations
Your address is: 184.73.74.47 - Using CCBot/2.0 - Logged.
Site Members do not see red text instructions, green links, and bottom of the page banners.
Click here to see all the Site Membership Benefits!