For what it's worth .... Lets review:

He originally posted he had an 82 degree T-stat, installed by a previous owner....then posts he has a lazy T-stat....and has a needle fluctuation issue....now, he's not sure what really is the <actual> case (due to too much info?).

What am I missing here?

Fact is that the vast majority of times when these t-stats fail, they fail (stick) "open"....hence the large number of posts with low temp ,and CELs due to low temp...this might be the case...

I can't remember ever reading a post on this 9-5 BB that has experienced a stuck-shut failed T-stat (causing the engine to overheat...or worse).


OT//I live in W. Michigan(typically over 100" of snow and c-c-c-old winters).....a parallel climate to that of Toronto. The 9-5 information I currently have does NOT list the 82C T-stat as a OE spec'd part, although a 82C T-stat from a C-900, 9000 etc certainly will fit in the hole.

After driving SAABs for over 31 years and over a million miles, I'm remembering the C900 series had an optional 92C T-stat for winter climate driving...

My SAAB WIS and SAAB EPC info on 9-5 info says 89C T-stat is the OE spec'd part. Furthermore, Eeuroparts does not show a 82C T-stat offered for the 9-5.

My sense is:
Install a 89C, the correct OE spec'd T-stat, and lets see if (any) adverse gauge needle fluctuation really exists in this ride....the go forth from there.

His car, (with an 89C T-stat) will warm up faster, provide more cabin heat, better fuel mileage, and greatly reduce any likelihood of engine oil sludge build up from cold climate, short distance driving conditions.

TG
2001 LPT wagon
158,000+ miles








posted by 24.247.254...

• Lazy thermostat - is it hurting my engine?, Mark from Toronto, Tue, 29 Dec 2009 22:03:43
  • Re: Lazy thermostat - is it hurting my engine?, TG, Wed, 30 Dec 2009 01:55:18
    • Is the fluctuation normal??, Mark from Toronto, Wed, 30 Dec 2009 12:34:20
    • Please explain??, bender , Wed, 30 Dec 2009 08:51:20
      • Re: Please explain??, SWEDECAR , Wed, 30 Dec 2009 08:59:34
        • and..., jeff in MD, Wed, 30 Dec 2009 09:29:57
          • It's not really running that cold...., Mark from Toronto, Wed, 30 Dec 2009 10:17:20
            • According to WIS specs for 4 cyl engines, TG, Wed, 30 Dec 2009 13:06:36
            • Re: It's not really running that cold...., SWEDECAR , Wed, 30 Dec 2009 12:53:39
              • Anders, you say something about fluctuating needle, bender , Thu, 31 Dec 2009 10:58:00
                • Read down 3 lines....n/m, TG, Thu, 31 Dec 2009 12:02:07
              • Something is not right here????????, TG, Wed, 30 Dec 2009 13:09:30
                • Could be a case of too much info..., Mark from Toronto, Wed, 30 Dec 2009 14:08:16
                  • Re: Could be a case of too much info..., TG, Wed, 30 Dec 2009 15:04:54
                    • WIS Specs...., Mark from Toronto, Thu, 31 Dec 2009 22:53:42
                      • Re: Normal cold weather temperature fluctuation, BobS, Fri, 1 Jan 2010 13:01:54
                        • Clarification here...., TG, Fri, 1 Jan 2010 13:36:18 <-- Viewing This Message
                          • Needle does NOT fluctuate..., Mark from Toronto, Sat, 2 Jan 2010 10:06:35
                            • Re: Needle does NOT fluctuate..., TG, Sat, 2 Jan 2010 12:31:06
                              • Re: Needle does NOT fluctuate..., Mark from Toronto, Sat, 2 Jan 2010 15:17:42
                      • Simple answer, TG, Fri, 1 Jan 2010 08:38:27
                    • Re: Thermostat response, BobS, Wed, 30 Dec 2009 22:09:48
                      • Re: Thermostat response, Mark from Toronto, Wed, 30 Dec 2009 22:14:13
                  • At what engine temp does fuel mix go to stoich?, Mark from Toronto, Wed, 30 Dec 2009 14:16:12
                    • I think it's in WIS, TG, Wed, 30 Dec 2009 15:11:47

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