Car Running Too Hot - 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 08-08-2005, 11:54 PM   #1
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Default Car Running Too Hot

This has been a hot summer for Minnesota, 30 days above 90* in the Minneapolis area. It has also been the first summer with a supercharged engine. The LSS runs hot in hot weather and in stop and go traffic reguardless of outside temp. I have a 180 t-stat, however, the car seems to hover around 200* when its hot outside on the highway. In town it stays between 210* and 225*. After 8 hours of rest the car will still be kinda warm ( 110-120*) the next morning. Went for a spirited drive in the country this past Sunday and the temp was around 210-215* the whole time. this can't be good is it?
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Old 08-08-2005, 11:56 PM   #2
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Sounds normal enough to me... maybe a touch warm.
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Old 08-09-2005, 12:12 AM   #3
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Thats pretty hot.. do you have the AC on? Thus the fan? If not.. I guess in stop and go traffic that might be ok.. but when my needle starts to go over 200* a tad.. and I know I won't be moving quickly within the city, I will turn the AC on just to get the fan going.. I know it kills MPG.. but a lil MPG gone is better then an engine gone from overheating.. IMO to stock setting for the fan to turn on is too hot 220*~
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Old 08-09-2005, 08:35 AM   #4
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In actuality the engines were designed to run between 195 F(t stat opening) and 226 F where the high speeds come on. Or basically 200-230, which to most of us seems pretty warm, but that is what the engineers designed. Sounds like you are not really getting over 220F most of the time.

I think that the lack of cooling over 8 hours is more of an issue. Maybe consider if it'* ever had a coolant flush/change. I did up my car and noticed about a 5-10 degree in hot weather difference. The coolant was original.
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