Re: 9-5 Running Hot: Replace the radiator or just flush? - 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 | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

95 Bulletin Board
(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 Photo Galleries]
Re: 9-5 Running Hot: Replace the radiator or just flush?
Posted by Stephen Goldberger [Email] (more from Stephen Goldberger) on Sat, 23 Jun 2018 07:55:59

In Reply to: 9-5 Running Hot: Replace the radiator or just flush?, wabi-saabi, Tue, 19 Jun 2018 17:57:16
Alert me when someone posts in this thread:

After 17 years, the history is as important as the symptoms. *IF* the car has been on a continuous diet of its OE specified coolant (blue stuff), with the recommended change interval, I'd say the radiator probably isn't fouled. If the POs switched to green stuff, or if it had an uncertain change interval I'd say replace it: if the radiator is fouled, all your rinsing won't change anything. The Citric and Oxalic acid treatment is for coffee makers which are partly fouled with calcium buildup. Your radiator, if fouled, is plugged with silicate (from green stuff) or aluminum oxide (from lack of maintenance) and the fouling will prevent the rinse agent from getting into the fouled tubes.

Or it might be just a stuck thermostat or temperature sender. Easy to simply change them first, and if there's no difference (or an inadequate difference) then it's the radiator for certain.

As for the hose nipple(s) failing, you could always stress them, and if they were going to go soon, that would do it. You would know for certain. Obviously the stress test requires having an alternate ride or spare parts readily available...

Finally, the 9-5 temperature gauge reading is infinitely adjustable. Someone with a Tech II can set the temperature at which it comes off the bottom peg, the temperature at which it reaches level, the temperature at which it leaves level, and the temperature at which it hits the top peg. The factory setting has a fairly wide dead zone in the middle. It can run a little cool or a little hot and still sit exactly in the middle. I always recommend having it set so it reads actual temperature without dead zones. That way you can likely observe something beginning to fail.
It's what I had done for my '02 when I bought it.

posted by 98.28.165...

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 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.


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][endlink] or use the Optional fields below.
To add inline images to your post, use [img][endimg] or use the Optional Image Link field below.

Optional Link: (e.g.
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.

The content on this site may not be republished without permission. Copyright © 1988-2018 - The Saab Network -
For usage guidelines, see the Mission and Purpose Page.
[Contact | Site Map | on Facebook | 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. has been a moderated forum since 1988. For usage guidelines, see the Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP -
Your address is: - Using CCBot/2.0 ( - Logged.
Site Members do not see red text instructions, skyscraper, nor box ads.
Click here to see all the Site Membership Benefits!