Question about 1995 Dodge Caravan

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Dodge caravan cooling and heating troubleshooting

Van had no heat so i changed out the thermostat and there was heat. Next day went for short drive had no heat so pulled over to check under the hood, when i opened the radiator cap a thick orange foamy sludge poured out, what could be the cause of this and could it have clogged the new thermostat already, will a cooling system flush clear the problem.

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  • Jerry Koski
    Jerry Koski May 11, 2010

    sounds right you might need to get a radiator flush and run it through the system and then refill with new antifreeze. the thermostat would take alot of **** to stop it from working .. but you might have some going in the heater core so Flush system good with heater on also.. thanks Jerry holler if you need more.


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Was the sludge Orange or more of a tan or brown colour? If there is a tan or brown colour sludge in the rad, this usually indicates a head gasket leak. I would flush out the cooling system and be sure that there is good coolant flow through the rad ( you should be able to see the coolant moving in the rad with the rad cap off and engine running) as well as no air locks in the cooling system. Feel the heater hoses at the fire wall with the engine at opperating temp. The hoses should be hot and close to the same temp. If not then there is a flow problem or a plugged heater core. hope this helps..Good luck.

Posted on Feb 05, 2009

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