Question about 1999 Chrysler 300M

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Leaking antifreeze inbetween tranny and motor 3.5 engine what could it be thank you 1999 chrysler 300m

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  • makayla00740 Apr 30, 2010

    thank you for your information but i called the dealer to find out if the 3.5 engine had a freeze out plug on the rear of the engine they told me no any other ideas thank you rob

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Very good chance the exspansion plug (freeze plug) at the rear of the engine has rusted through. Not maintaining the correct antifeeze solution may have allowed rust or electrolisis to occurr.

Posted on Apr 30, 2010

  • rbonner904 May 01, 2010

    If there is no "freeze" plug, which surprises me because they have to get the casting sand out somewhere, the liquid must be coming from somewhere.

    Are you sure it is antifreeze and not transmission fluid, which is red in color?

    Antifreeze may be leaking from a hose above the transmission and running down the joint and just looks like it is coming from between them. The heater hoses run into the firewall to the heater.

    The water pump is also another leak source. When the engine is running, the wind can blow the coolant all over the engine compartment.

    A way to find the leak would be to clean the engine and transmission areas, wait until dry and pressurize the cooling system.. dont go over about 13 psi. You may be able to rent a tool for doing this. This should identify the area.

    If you cant get a tool, you can just run your engine to warm it up and build the pressure..Make sure your radiator is full, the radiator cap is tight and start the test from a cold engine.

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