turbo seals? - Saab 900 Bulletin Board - Saabnet.com
NG900 & OG93 |
Vintage Models |
Clubs & SOC |
Other Cars |
Member Photo Galleries |
Member Directory |
*Buddy Registry |
*Mileage Registry |
What's New |
Photo of the Month |
Thank you for posting at TSN!
The 1985 900 Turbo was the first year SAAB employed the 16 valve/B202 engine, and GARRETT TB03 turbocharger with 50 wheel trim. SAAB 900 used this same TB03 turbocharger trim size to 1989.
In and out shaft movement would be caused by a failing internal turbocharger thrust bearing. This movement could cause damage due to the rotating turbine/compressor wheels which are now allowed to come into contact with their respective housings, and may show more symptoms as this thrust increases over time. Watch for diminished turbocharger boost pressures, changes in turbocharger vocals, or smoke in the exhaust, which would indicate a worsening condition to the thrust assembly. Eventually, this thrust will allow for enough movement to disrupt/unseat the turbine oil seal, which would require an immediate fix such as TB03 cartridge replacement or compete turbocharger.
Turbocharger pressures should only be capable of entering the crankcase via a bad check valve at the valve cover if ventilation is adequate, and engine is as specified(Even Compression At All 4 Cylinders).
The lower turbocharger pressures could be caused by a combination of the TB03 rotating conditions, as well as the thrust movement which you found at the shaft.
Good luck with this project, and please feel free to inform as to your progress!
Gary K. at SDI
->Posting last edited on Tue, 8 May 2018 20:45:38.
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: 220.127.116.11 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.
Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all
the Site Membership Benefits!