Question about 2004 Chrysler 300

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I have a 2002 Chrysler Town and Country minimvan that has a 3.8L V-6 engine. Water gets out of radiator but no leaks are seen under vehicle. Water in reservoir tankstays full even though radiator is low of coolant. Occassionally the temperature hand inside the vehicle will rise almost to hot, but without any interference it drops quickly to normal. Heater, at times, temporarily blows cold air but soon returns to warm air. I have been adding coolant to radiator. Would replacing thermostat or radiator cap help? Any clue on where the water may be going and how to corret the problem will be appreciated.

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  • drespess Mar 04, 2009

    We have replaced the radiator cap and put on a new thermostat. Drove @10 miles today and the temperature hand styed very low and didn't notice any water escaping. Will continue to try out here close to home to make sure all is o.k. Thank you very much for your help.

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May be a bad head gasket check oil for signs of coolant mixing in there may be a cracked head or even a bad head gasket. Going by what you said that there is NO visible leak the only other way for you to be loosing coolant if for it be burning out by engine or mixing in oil. To check for mixing check under oil cap for creamish-while residue or oil looking like milk shake. Good luck and thanks for using FIX YA

Posted on Feb 28, 2009

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You may have a faulty rad cap, grab a new one at autoparts store, and try this first. With engine cool, take rad cap off, start engine & turn heater(not defrost) on. Top up coolant in rad to 1-2" from top. Let it run with cap off and add coolant as needed, until the engine reaches normal operating temperature, and the rad fan comes on, then shuts back off. Let it run like this until that fan comes on & off at least 3 times. Add coolant as needed in rad, while you watch it, and rev engine slightly every once in a while for 5 or 10 seconds. After rad fan has come on & off 3 times, make sure to top up coolant to 1-2" from top in rad, and put your new rad cap on all the way, and now lets see what happens. If at any time the temperature gauge goes up too close to hot, shut it off, let it cool down & try again. Top up coolant bottle to marked level .Let me know. It should now run normal temperature and have heat as required. If yu feel ambitious, it never hurts to change thermostat if it hasn't been done in a while, but at this time, it may not be necessary. My guess is problem is faulty rad cap & an airlock in your system. After all this is done, if all seems o.k. keep an eye on coolant level, my guess is it will be o.k. , if not get back to me.

Posted on Feb 28, 2009

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