Question about Dodge Grand Caravan

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I have changed the rad and the thermostate and the temp cooling sensor and it still runs hot tell me why please

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You have a bubble in the cooling system that is blocking the thermostat from opening. Alleviating it is simple. Now that you've changed everything, just jack the car up so that the thermostat's opening is facing slightly upward. Start the vehicle and let it idle until it's about 3/4 of the way to hot. This is how you'll know the bubbles are trapped behind the thermostat and keeping it from opening (you want it facing upward so that the bubbles will stay behind the thermostat and not move off away from it). Once you reach 3/4 hot, shut off the car and go have a beer while it cools off. Once it cools enough to safely open the radiator cap, open it up and the release of pressure will allow the thermostat to open. The bubbles will come through the thermostat and "burp" out of the radiator (which you may or may not see, but it will happen). You may see the level of coolant drop somewhat, since the air bubbles were taking up space in the cooling system. Top off your coolant both in the radiator and the overflow reservoir if yours has a fill cap, put the cap back on the radiator, and you are good to go. With the bubbles burped out, your thermostat will be able to open and close as needed and the cooling system will operate as it should.

Posted on Sep 16, 2008

  • Ted Vergara Sep 08, 2013

    Hi! Jeremy I already your advice above, but my problem now with my 2008 grand caravan is the check engine indecator will keep on appearing from time. If I'll bring it to the shop the technician upon putting that electronic gadget it will say "coolant system malfuction" so the technician will reset it, but still days after the check engine indicator will light again. What will I do with this please help me. Thanks ahead

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