Question about Chevrolet Cavalier

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My 04 cavalier 2.2 is throwing the water? it does build up pressure but still throws it. it has a new thermostat and the radiator has had a leak stopper added to it? i have not flushed it yet...

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  • Jeremy W.
    Jeremy W. Sep 30, 2010

    where is it throwing water out of?



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  • 4,340 Answers

Check for presence of exhaust in the cooling system.
Never use stop leak as it plugs everything, but too late.
Also check for air bleeds that keep the system from fully filling.
Fill the cooling system with heater on high, or risk blocking that entire area.
Pressure test the system, paying particular attention to the amount that you have to pump to get pressure, an indication of air trapped in the system.

Run the vehicle until warm, shut down and feel all around on the radiator. Cool spots indicate plugged areas.

Posted on Sep 30, 2010


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Good Day again,

Sorry to hear it wasn't the thermostat, Other possible causes inlcudes low coolant, water pump and or waterpump belt, radiator blockage, and radiator cap not maintaining pressure. Check you coolant level first, fill if it's low, typically if it was the pump you would devolop a coolant leak as the pressure builds in the pump assembly. Check the belt though, any squeaks while running? Also if the seal in the raditor cap is bad then no pressure can build. To test the pump remove the raditaor cap (ensure the motor is COLD!!) and start the motor w/o the cap installed, watch the coolant level as it is should be going down slowly as it pumps through the system. Also check the seal on the raditor cap for any cracks's or visible damage.

The temp sensor is a possibilty but a rare one at that.

Hope this helps again

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