Q: Overheating going over 65mph on interstate.

asked by on July 19, 2017

My truck wants to overheat on interstate when reach speeds of 65 mph or more. I have replaced the radiator, Fan clutch, thermostat, and water pump, all within the last year. What else could it be? Does radiator need flushed?

My car has 127000 miles.
My car has an automatic transmission.

It sounds like you may possibly have a clogged radiator or potentially cooling fans that may not be coming on at the correct times. I would suggest having the radiator flushed and checking the cooling fan relay to be sure it is properly triggering the cooling fans to come on at the right times. The other possibility may be that the fans may be coming on, but not at the right speeds which may be impacted by the cooling fan resistor, so you will want to check this as well.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Iac valve

Danny. We appreciate you contacting us and asking questions - but this issue with your Dakota is something that we really can't "guess" at what might be normal or is wrong with your Dakota. Any responsible mechanic would insist on...

Replacement of refueling vent valve

If the device has a broken port, it must be replaced. It is very hard to mock up a connection that will seal as perfectly as it used to. I believe the vent valve is attached to the charcoal canister...

How do i reset the computer after i change the crank shaft position censor?

To reset the check engine light you can disconnect the battery via the negative battery terminal and let the vehicle sit for an hour before reconnecting the battery. This will drain all of the power from the electronics and clear...

Related articles

2012 Chevrolet Silverado vs. 2012 Dodge Ram: Which One Should I Buy?
When you are looking for a way to get a load of mulch or gravel, or need to haul a large trailer or boat behind your vehicle, chances are you are looking for a truck. Trucks are not meant to...
The Best Used Cars to Buy For a Graduation Gift
Your Your little bundle of joy has grown up and on the cusp of entering adulthood. Graduating is a milestone, and you want to reward their hard work and show how proud you are. Buying a used car is a...
2012 Toyota Highlander vs. 2012 Dodge Durango: Which One Should I Buy?
Sport Utility Vehicles (SUVs) are a fun class of vehicle: not only are they great for carpools and moving around friends and family, but you can also get them off-road and just get dirty and have fun with them. These...