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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-16-2003, 04:11 PM   #1
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Hey Bonneville Land, ever since i can remember with my car, it hasn't had really good heat. It has and has had the tendency to be warm in my car for about 15-20 minutes then it seems to shut off, or just blow cold air. Can anyone help me out? It'* annoying the crap out of me because it'* cold outside and i dont want it to be cold INSIDE as well
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Old 12-16-2003, 10:39 PM   #2
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The first thing I would do is check the water level in the radiator. Is it up to the top and is there plenty of coolant in the overflow tank? Also, now is a good time to check the condition of the Radiator Cap. If that'* OK, go out a get a new 195 degree thermostat and gasket and replace the existing thermostat. Make sure that after you install the new thermostat that you bleed the system. That is, getting rid of any air that might be trapped in the engine. Usually just running the engine with the radiator cap off for a few minutes does the trick. If that STILL does not provide adequate heat then it could possibly be a clogged heater core. But I'll defer to the guru'* of know-how to tell you other things that you might need to check.
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Old 12-20-2003, 02:11 AM   #3
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If gets heat for a while then shuts off, I'd pull the glovebox and watch the rod from the top of the HVAC programmer to the hot/cold diverter, bet it is opening early. Do you have automatic temperature control ?
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Old 12-21-2003, 03:00 PM   #4
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Yes, as a matter of fact i do have automatic temp control. For some reason, i attempted to turn up the heat one day to see if it would still run cold, and it actually got hot again, is that any indication of anything?
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Old 12-21-2003, 10:51 PM   #5
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Yes, what is your temperature setting ? Is possible the in-car sensor if failing an *thinks* it is warm enough inside when it isn't. MAX HEAT (keep hitting warmer until it says "MAX" or 90F and see what happens.
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