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by koniak333 on November 16th, 2009

koniak333

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I need a diagram on how to change my thermostat in my 97 pontiac grand am se, 2.4l. thanks

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Answers. 1 helpful answer below.

  • by The Chief on November 16th, 2009

    The Chief

    You can but the Chiltens or Mitchells manual for your vehicle at a local parts store. They probably run about 25 bucks or so, and they'll have lots of other infomation you can use later on as well. Worth the investment.

    You can try googling the subject. Shouldn't be too hard.

    But I'll describe it for you:

    You have two radiator hoses on your car: An upper radiator hose and a lower radiator hose.

    Your upper radiator hose will attach to a small housing on your engine. This is where your thermostat is located.

    WITH THE ENGINE COOL! Drain your radiator down some and then disconnect the upper radiator hose where it is connected to the engine.

    (Inspect your hoses...if any are cracked or dry rotted, get replacements for them.)

    The housing where your upper radiator hose was connected is bolted to your engine block with probably two bolts. Remove these and pop the housing off. This may take a little gentle prying and/or wiggling.

    Once it's off, you will see your thermostat. BEFORE REMOVING IT look at the way it is installed so that you know which way to install the new one.

    Clean the gasket seating surfaces on the engine block (don't let the debris enter into the engine...wipe itout if it does) and the thermostat housing. Install the new thermostat in the same orientation that the old one was in.

    Put a thin layer of RTV or Permatex No. 2 on both sides of the gasket. Set the gasket in place and carefully install the housing. Snug the bolts down by finger, then alternately tighten them gently with a wrench until they are snugged down tightly. (DON'T OVER TORQUE! They should be tight...but not tight enough to snap the bolts. The RTV/Permatex will provide the seal.)

    Reconnect the upper radiator hose.

    Top off your radiator with antifreeze/water mixture, start your engine and let it warm up to normal operating temperature.

    You should feel the upper radiator hose as the engine is warming up. It will get hot when the engine is hot enough for the thermostat to pop open and let water circulate through the radiator. Make sure there are no leaks.

    NOTE:

    Any time you have to break into yoru coolant system, you should inspect all the hoses to see if any need replacing, including hose clamps. Also, consider flushing your radiator system and replacing the antifreeze/water mixture as well.

    Most people do not realize this, but your antifreeze will NOT last forever. It should be replaced about once a year. The antifreeze provides important lubrication for your water pump AND the additives in the antifreeze are important to keeping your radiator in good condition.

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