The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 7/1: Members: Log In to See Fewer Ads! | 5/28: SAAB Evolutions/TSN T-Shirts $14
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

95 Bulletin Board
1999-2009 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main 95 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Oil sludge vs. timing chain problems
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Thu, 3 Feb 2005 07:06:54 Share Post by Email
In Reply to: Re: Expect the worst, hope for the best, saabrocket, Thu, 3 Feb 2005 06:10:38
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

From what I've been able to gather, the 8-year warranty is primarily the oil sludge issue. Yes, that can lead to timing chain issues. But as far as I know, the primariy failure mode of the oil sludge is a sudden blocking of the oil pickup screen, with a catastrophic engine failure due to oil pressure loss. That would be bottom end and bearing failures; the timing chain can live without oil a lot longer.

There may also be a crankcase overpressure issue due to the PCV valve, and that was/is a design issue. I don't think that the sludge is necessarily a design issue; maybe making the oil pickup screen coarser may help, and possibly there were some design changes that caused hot spots in the engine, degrading the oil faster. But that's just speculation on my part. I personally believe that the industry-wide oil sludge issue is due to the industry-wide trend to longer and longer oil change intervals. Yes, you can get away with a lot with modern engines and oils, but the safety margin is significantly cut. All it takes is some harsh use - short trips where the water isn't boiled off, and/or a missed oil change, and 7500 becomes 15,000.

So I don't think there is a timing chain design issue, and short of the PCV issue, any unusual wear of an oil-washed component leads me to worry about all the oil-washed components.

You could always buy the car and hope that any failure gets covered by the warranty. But to get to your first question - what to replace? I would assume all of the timing chain componentry at a minimum - chain, sprockets, guides. If the timing chain is worn, makes sense to do the balance chain. At a minimum inspect the balance shaft sprockets. If I had the engine that far apart, I'd drop the oil pan and clean the pan/screen of any sludge.
I haven't priced the components, but I'd guess around $800 for parts - just a guess.


posted by 192.249....
Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
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.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
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 - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


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!