Question about 1999 Pontiac Grand Am GT

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Car overheating I have a 1999 Pontiac Grand Am. The last 3 months I had to place colant in every 2-3 weeks. But within the last couple weeks every other day. It works fine for a couple days then slowly but surely it begins to over heat. I have checked the hoses when I am placing the coolant in if there are any leaks. NO LEAKS, but when i drive for a few miles i get out the car you can smell the coolant and see a little bit of smoke when i am parked. I am trying to figure out if this is a problem with the raditor something esle. The A/C works fine and so does the heat. Works perfect after placing in the coolant a couple days later it's empty and acts slugish. Please HELP.....

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  • j-vonna Oct 07, 2008

    Could there be a leak i am not seeing? Very SLOW LEAK? I see the smoke when I am parked and i could smell it, Could it be the radiator?

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Posted on Nov 11, 2008

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If u dont have a leak, then the coolant aint the problem, my guess is its the thermostat, this is how it works, you turn the car on, the thermostat is closed, re-circulating the coolant in the engine block until the engine hits "normal" operating tempurate. When it reaches normal operating tempurate the thermostat opens allowing the hot coolant to cool down some what through the radiator, and continues to circulate, my guess is the thermostat is stuck closed, not allowing the hot coolant to escape thus keep on heating up til u smell it. The problem is i dont have a pontiac to tell you where the thermostat is located specifically, u can buy yourself a haynes manual for $20 or so to help u in future cases which is how i learnt most the stuff i know. All i know is if u follow the upper radiator hose away from the radiaotr to the engine block you should come across a bleed screw, its beyond that and the thermostat housing is attached to the engine block, in my impala you have to take apart the air duct and cleaner housing to even get close to it. It may be easier in the pontiac i dont know, u can buy a thermostat from an auto parts store, some some with a seal built in some dont, if they dont youll need a new seal too, shouldnt cost u more than about $15-20 to D.I.Y. Wish i could help you further. Good Luck

Posted on Oct 07, 2008

  • joeyboy87boy Oct 07, 2008

    i personally feel if theres a leak, youll see it underneath the car, a real slow leak would be harder to see underneath but then you wouldnt be changing coolant so often with a slow leak, if your feeling there still may be a leak tonight put a piece of card underneath the hood, like around the radiator, then see, like i said though, id check the thermostat.

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