Skip the auto shop - Our mechanics make house calls

Q: I have a 2003 Dodge Durango with a 5.9L. It is trying to run hot. I have replaced the thermostat because it looked like it was leaking there.

asked by on

Running hot. Leaking on passenger side out of hoses going into firewall. Have changed thermostat. Didn't help problem. Almost like water is not circulating.

My car has 165000 miles.
My car has an automatic transmission.

Hi there. The coolant would be leaking from the heater hoses. Check the clamps to the heater hose clamps and make sure that they are all tight. If the clamps are tight and the hoses are still leaking, then I recommend replacing the heater hoses. If the coolant is not cycling, then check the water pump and see if it’s plugged up or damaged. A water pump can get sludge build-up and cause the coolant to go through the by-pass and not circulate properly. If you need further assistance with your engine overheating, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  • Home
  • Questions
  • I have a 2003 Dodge Durango with a 5.9L. It is trying to run hot. I have replaced the thermostat because it looked like it was leaking there.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My temperature gauge goes to hot while idling, but the car does not overheat.

The rise in temperature is due to the fan clutch not engaging the fan clutch until the temperature gets too high. This is the first indication that the cooling fan clutch is going bad. If you replace the cooling fan...

Q: Truck barely wants to move in 2 hi

Hello. It sounds like you have a transfer case that is failing. It may only be transferring power to the front wheels which will cause these symptoms to occur. I usually drain the fluid from the transfer case and inspect...

Q: Leakage near the radiator fill cap and the AC/Heater doesn't work

It sounds like you have 4 issues: Coolant leak Possible issue with the water pump An unexplained, but transitory noise HVAC faults. The coolant leak is the most important one to fix first because a coolant leak can...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...