Trying out Viton O-rings this weekend & experiment update - Saabnet.com Bulletin Board


[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | Books Movies & Music | Chat | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Service/Mechs | Manuals | Polls | What's New | Raffle | Photo of the Month | Sponsors]

95 Bulletin Board
1999-2009
Search:
(Search Author's Posts: e.g. Keyword:Author)*Members Only


[Main 95 Bulletin Board | Post Followup | BBFAQ ] [ Prev by Date ] [ Next by Date ] Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
Trying out Viton O-rings this weekend & experiment update
Posted by Mark in Marine [Email] (#1837) [Profile/Gallery] (more from Mark in Marine) on Tue, 14 Nov 2017 18:00:55

In Reply to: Re: Coolant pipe leak-advice Swedecar?, DnstrDan [Profile/Gallery] , Thu, 9 Nov 2017 19:21:54
Alert me when someone posts in this thread:

I also have had the recurring O-ring failures at about two years (25 months and 22K miles for my older daughter's 2006 SC this week).

I have a '99 9-5 on which I replaced the block-side O-ring with a Viton one in too-large a size (221 I think) back in 2011. I sanded down the OD until it just barely could be tapped in w. rubber mallet. I was doing it in an unheated garage in December, and I did not have time to shop O-ring sizes in Viton. That car now has 45K miles and approaching six years on its Graf pump without failure - but it's a sample of one.

As prevention, I replaced the WP's and all seals on each of my two daughters's 2006 9-5's about two years ago; both jobs within 2 or 3 months of each other. I tried to use a fluoroelastomer O-ring, but it cut while installing, so I used standard O-rings covered in Permatex Blue Ultra. The first of those is now leaking at 25 months and about 22K miles (plus two winters). From your posts and my experience, I expect I'll need to do this job on my other daughter's car soon.

I purchased Viton O-rings from McMaster Carr in 218,219,220, and 221 sizes (all SAE/inch sizing). I got the 220 and 221 sizes from Swedecar's post on O-rings for 9-5 and 9-3 water pumps. I will try all four on the pipe-to-block after everything is cleaned and polished, and I'll use the size that fits most snugly without sanding or hammering. I plan to use a Gleitmo equivalent anti-corrosion lube for installation. I'll pressure test before I re-assemble the ancillaries - and I will report on what size worked best for me. These O-rings have a spec shelf life of 10 years and are not very expensive: 68 to 72 cents each in 10-packs. If this works, I will be happy ! But it is a multi-year experiment.

Hope that your job went well last weekend.

Mark in Marine
Posts in this Thread:
Alert me when someone 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.

Name: Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.
If you use GMail, follow these instructions from Google so that they appear in your regular inbox.

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.
Site Members do not see any red text, inline ad links, skyscraper ads, box ads, nor anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the TSN Classifieds)
To add inline links to your post, use [link]http://www.domain.com/[endlink] or use the Optional fields below.
To add inline images to your post, 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/)
To promote your own Saab site here, you must have a link back to The Saab Network.
Link Title: (Optional)
Optional Image Link: (e.g. http://www.saabnet.com/img.jpg)




The content on this site may not be republished without permission. Copyright © 1988-2017 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

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 | RandomScreening.com
Your address is: 54.161.108.158 - Using CCBot/2.0 (http://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!