Question about 2004 Pontiac Grand Am

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How to replace a thermostat in a 2004 pontiac grand am

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  • Master
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You will need to drain the antifreeze, remove the radiator hose that mounts to the housing at the top of the engine block. Remove with a plastic scraper any remains of the old gasket, dry the area well and replace the thermostat and gasket in the same position that the old one was sitting in. (Notice which way the spring is sitting.)

Do not over-tighten the bolts that hold the housing down since the housing is pot metal that will crack if overstressed - notice how much effort it took to get them loose. Replace the hose, refill the antifreeze and you're done. If you can afford it, replace the hoses while you are at it if they are more than 3 -4 years old. Let the car idle until it gets to normal operating temp and check for any leaks.

Posted on May 30, 2010

  • tigerswin Jul 26, 2011

    The thermostat is located on the back side of engine behind cross over pipe. It is not as easy as 240cpa thinks. There is very little room but is accessable if you remove throttle body and air cleaner cover and hoses. Front bolt you can reach with a socket rear bolt you can only get with a wrench and maybe if lucky a 1/4 turn at a time. Good luck it is not an easy one.

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