hi,

I have a 2004 Concorde with the 3.5L and had signs of a bad thermostat (the vehicle took a very long time to get to running temp). I recently replaced the thermostat with an aftermarket one from NAPA and everything seemed good for a few days. This past week the weather has been cold (20 degrees F) and the car engine will get to running temp while sitting but once I drive it drops back to cold ( when hooked to the OBDII reader while driving it does not get above 140’F). Is there a difference between Chrysler thermostats and aftermarket ones? Is it possible I just got a bad thermostat? Are there any other problems that may cause this that you are aware of?

Thanks .
Derek

 

also, is the coolant outlet from the block the upper rad hose or lower? ( is the thermostat keeping coolant in or preventing it from entering?)

 

Sounds like a bad thermostate even though it's new. If you feel the top and bottom hoses on the rad and they feel the same temp then the thermostate is no good..

 

turned out to be the new one was defective, i installed a mopar part and it has been problem free

 

Can you tell me where the thermostat is? I have the same problem and the car is overheating.


thanks, scotmick