Question about 2002 Chevrolet Impala

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Thermostat on 2002 Chevy Impala

Thermostat have a 2002 Chevy Impala loosing coolant. Change the intake gasket 1 1/2 yrs ago no leaks, changed radiator cap, seem to work for a while refilled radiator and 3 weeks later coolant light comes on again. Going to change thermostat and see where its at, but not sure the safest and easiest way to get to it. Please help. I need some directions on how to change a thermostat on a 2002 Chevy Impala 3.4L V6.Thanks!

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  • NathanielD Jan 19, 2009

    I need to replace the thermostat on my 02 Impala 3.4L but I can't figure out how to get to it without disassembling half of the car. What is the easiest way to get to the Thermostat housing. The more specific the directions, the better. Thank You

  • sdrzola Jan 27, 2009

    my car started to over heat and loose cooliant a day after i took it to get a oil change and they topped off all fluids and the next day the low cooliant light came on, i checked the radiator but it was cold to the touch and lost a lot of the water. would changing out the thermostat fix this problem?

  • edwin greenfield
    edwin greenfield Nov 13, 2013

    take off the thourtal body and un hook the rubber pieces to the air intake and the hose runing under that stuff is connected to a alluminam or steel housing is where it is its 2 bolts take them out and ur there i did it 3 times to my 2000 impala 3.4liter v6

  • Anonymous Mar 17, 2014

    Recently had the head gasket changed on my 405 1.8 8 valve; however I'm still having a little bit of loss of coolant out of the over flow. The gasket was machined and thermostat was also changed. Could it be the head gasket again? I've also tried a new radiator cap but didn't help much.

  • Anonymous Mar 27, 2014

    Thebside bolts
    on the oil pan won't line up.

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The best thing to get is the Haynes manual for your car at advanced auto or autozone or somewhere like that and the book will tell you how to take everything apart and put it back. i think the manual is about $16.00

Posted on Jul 30, 2008

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The best thing to do in all honesty is to try simple things first. I was losing fluid, and the car was overheating and all I did was this and it has worked. Buy radiator flush (prestone is readily available at walmart or elsewhere. and also buy a can or bottle of stop leak (radiator stop leak) powder form is best. You will need access to a water hose or several containers of water. While the car is cold remove the upper radiator hose and make sure that you have a large pan (very large) for all of the anti-freeze to drip into. You will probably need to remove the splash guard which is held on by screws in various places, prior to removing the radiator hose. Once all of the old fluid is out replace the radiator hose and turn the car ON> while simultaneously adding water and the radiator flush. Let the car run for about 20 minutes with the heat turned on high. Always have the car running while you are adding to the radiator so that you do not crack the motor head. Once you have left this running for 20 minutes make sure that you have long yellow gloves on and long sleeves and carefully remove the upper radiator hose and let everything drip out. It will be extremely hot so be very careful. The radiator hose is held in place by a very strong clip and I had to to use long needle nose pliars to open it up to remove the hose. When everything has dripped out, turn the car on and let water run through the system for maybe 2-3 minutes. Turn the car off and when everything has leaked out, replace the radiator hose. You should already have your anti-freeze mixture ready 50% water and 50% antifreeze (depending on where you live, this is for most areas). First with the car OFF put in the radiator stop leak product and then turn the car ON and add your antifreeze mixture until it starts bubbling up real bad through the radiator. Replace the cap, and if you desire finish filling up through the overflow tank. This should solve your problem. Dirty anti-freeze is a common cause of a lot of leaks, and overheating. Hope this helps

Posted on Feb 11, 2009

  • gofalcons Feb 12, 2009

    I used google and searched Impala thermostat location and on
    Wiki answers there is some pretty specific details on what you need to remove in order to access the thermostat. Hope this helps,

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