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I've used Wahler Thermostats in a Volvo 745T and changed one at 204k and another 295k just as a precaution. I changed the t-stat in this 9-5 as a precaution at 127k when I did the radiator. The t-stat housing was also weeping so the gasket had gone bad. Hard to believe the older t-stat was likely original and probably lasted nine years and this one lasts nine months. Why would a Wahler t-stat last 90k+ in a Volvo and only 9k in a Saab?
I tapped on the housing last night lightly with a hammer. My wife reports today that the gauge has gone back to reading normally although the CEL is still latched.
The radiator and upper hose were probably less than 100°F (surface temp) last night when she pulled in. The ambient air temp was 15°F. A 100°F surface temp is abnormally low for the radiator which typically is >125°F so I suspect the gauge and sender are OK but it's indeed the thermostat.
I've ordered an Op-Com reader so I'll be able to monitor the coolant temperature a little more closely. If it acts up again I'll be ready with a new t-stat (Motorad). I can report back on an exact surface temp for the radiator and codes.
posted by 75.38.241...
_______________________________________
'03 Aero 5Spd, Krona, 290 bhp (son's)
Sold:
'04 Aero Sport Kombi, Sport Tek, BSR
'03 Linear 5 spd. Krona Mods, 350 bhp
Posts in this Thread:
- Thermostat Longevity, Doug W , Fri, 17 Jan 2014 21:22:28
- Pre test, EricG, Sun, 19 Jan 2014 11:21:57
- Re: Thermostat Longevity, Saabmedic, Sun, 19 Jan 2014 11:06:43
- "Premium" thermostats and 180 degrees, Name Left Blank, Sun, 19 Jan 2014 06:47:06
- Sad to say, SWEDECAR , Sat, 18 Jan 2014 08:56:31
- Re: Thermostat Longevity, CY, Sat, 18 Jan 2014 08:37:19
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