Over cooling - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-10-2009, 01:02 PM   #1
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Exclamation Over cooling

Its winter time on the Canadian prairies, and with temps hitting the -40C mark, I'm noticing my car is running very cold. My temp gauge 1st marker is 90, and I must be sitting at around the 110 mark tops when it is as hot as it will get. I was going to change my t-stat to the one from my old engine since I know it worked well, but I'm not sure I want to if its just the outside temps doing it. My woman has a little cavalier, and her car holds a good temp, so at this point I am unsure of what I should look at 1st.
Damn car will hardly keep my windshield defrosted on the highway, so I am just fishing for opinions.
BTW its not climate controlled, it is just old school ***** (which are all cracking and junky, so if anyone has anything to say about replacing them would be a bonus too)
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Old 12-10-2009, 01:07 PM   #2
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Definitely go for the thermostat first. These should have no problems getting up to temp even in extreme colds.

Are the fans running at all?
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Old 12-10-2009, 01:16 PM   #3
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The heater fan blows, luke warm, but it blows properly. To be honest I haven't checked the front fans in a few months. I ended up with stuck sliders on my calipers, and ended up parking it for a month or so while I got ready to fix it. I don't see why they wouldn't be since we just replaced the motor, and cleaned everything right up nice. Now its -40C, and going outside is like ouch.
I'm thinking my T-stat is stuck open, and it is constantly circulating, but I am no expert. lol
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Old 12-10-2009, 01:42 PM   #4
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From one Canadian to another .... change your thermostat. Also, use your block heater.
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Old 12-10-2009, 01:46 PM   #5
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HaHa!
I know man, Been plugged in every night for the last week or so. We had an amazing November, but December is seriously messing us up over here.
I think I will change that T-Stat. I need to re bleed my new brakes and take a look at my PS pump anyways.
I hate draining antifreeze though (groan) lol.
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Old 12-10-2009, 02:32 PM   #6
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You don't have to drain your coolant to replace a t-stat. You will lose a little bit, maybe a pint or so? If replacing your t-stat doesn't do the trick, try placing a small piece of cardboard in front of your radiator.
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Old 12-10-2009, 02:35 PM   #7
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Oh sweet. Good to know. My old car i needed to drain some antifreeze to do it. I changed it twice, first I didn't drain any and lost quite a lot. Made a big mess all over :(. Second time I just drained a little, and didn't lose anything.
Thanks for the advice guys!
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Old 12-18-2009, 03:46 PM   #8
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Sorry to bump up an older post, but I just wanted to resolve this. It was indeed my t-stat. Changed it out. Only took about 5 mins, and now all is well.
Thanks everyone!
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Old 12-18-2009, 03:50 PM   #9
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Good to hear. Love the easy fast fixes.
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Old 12-18-2009, 04:08 PM   #10
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Yea Dan,
Short of the few days of cold driving and horrible gas millage, this was blissfully easy and cheap to fix.
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