Here is what I need you to do. I have a feeling someone mixed dexcool coolant with a different type. Remove the thermostat and flush it until clean water comes out. Next, disconnect the heater core hoses and flush the heater core in both directions.
When replacing the coolant, make sure you use the proper coolant. I believe they make a GL5 which is universal and can be mixed with all coolants. That is what I would recommend incase there is any residual coolant left in the engine / core.
If this doesn't help, then chances are you have a head gasket or intake leaking. Also, make sure the coolant doesn't have oil or ATF mixing with it.
Let me know what you find.
Tuesday, December 8th, 2009 AT 10:35 AM