I have a 1999 Durango with 160k on it. I just replaced the thermostat and radiator cap. This did nothing to give me more heat. I did notice when I started it after installing the thermostat while I was topping off the radiator, it seemed I got return fluid before it heated up. Is there a bypass I should check? My temp guage reads on the low side in the operating range.

Thank you,

Richard

 

It's probably just your heater core is starting to clog up. Does it get warmer when you are driving and cool down while idling? If so do a reverse flush on it and you should be good to go. I need to get to mine as well I just don't have anywhere to hook up a hose.