Potential for Loss of Power Assist in Braking System (LONG) - Saab 9-5 Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 3/26 M Car Covers (by State of Nine) | 12/12 Make Amazon Pay Saabnet!

[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
Potential for Loss of Power Assist in Braking System (LONG)
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Dave the Ice Age Knave [Email] (#2068) [Profile/Gallery] (more from Dave the Ice Age Knave) on Wed, 5 Oct 2016 17:52:44 Share Post by Email
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Although this warning applies specifically to a 2006 9-5 Damn Edna automatic, other Saab 9-5 systems may be identical or similar:

Should the black one-way vacuum valve fail between the intake and brake booster (aka brake servo) unit, there will most likely be a sudden or almost immediate loss of power assist. I was fortunate that when this happened to me, I was driving at a very slow speed while turning onto a road. The loss of braking ability was shocking, something in the order of 75%. I pulled over at the earliest opportunity and found the valve had separated from the vacuum line. The valve nipple was partially broken but I was able to rejoin the line to the remaining part of the valve nipple and carefully drive the few remaining white knuckle kilometres home. It's quite possible that I had put some pressure on that area a couple of days before with my ham fist while searching for oil leaks. Had the vehicle been new, the German made valve would probably have been fine but 10 years of extreme temperatures and normal oxidation had probably taken it's toll. My recommendation to self and to anyone who chooses to listen is to replace the entire pcv system with OE parts no later than every ten years or 100,000km. After replacement, I noted that the broken valve had lost its one-way function. We do read a lot about enthusiasts replacing old PCV and vacuum lines but the equally important focus should be on the various valves. I do not recommend aftermarket parts since they may not work correctly -it's ORIO cookie cut parts with the Deutsche valves or nothing. As a further footnote, I speculate the old Dame has ceramic pads in the front as opposed to semi-metallic. A power assist failure results in an order of fear higher with ceramics rather than semi-metallic due to the need for higher brake force, IMHO, over semi-metallic to accomplish the same degree of braking.

posted by 108.63.104...


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!