Skip the auto shop - Our mechanics make house calls

Q: Why is my car running hot?

asked by on

I just replaced the full radiator and fan on my car. And since then it started running hot only when driving

My car has 154500 miles.
My car has an automatic transmission.

A: Hi there. Your vehicle running hot only whe...

Hi there. Your vehicle running hot only when driving could be the thermostat only partially opening. It may be the result of air trapped in the cooling system when the radiator was replaced. The cooling system may need to be bled.

A cooling system flush would resolve the trapped air. I recommend having your vehicle’s overheating problem diagnosed by a certified technician, such as one from YourMechanic, so that the right repair can be made.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Flickering lights

If the idle fluctuates enough, you might see some flicker, because the engine of course drives the alternator. However, the roughness could be a separate issue - that is, the alternator could be failing, too. One diagnostic strategy is to...

Q: Car dies when I stop

Hi there. Stalling can be caused by a number of things, anything from a vacuum leak, to a problem with one of the engine's sensors or fuel system. As engine performance problems, such as these, are sometimes not obvious to...

Q: No heating in the car

Hello. You may need to have the blend actuator reset again. If this does not resolve the problem permanently, it may be necessary to have the blend actuator replaced. The heater core is the component that allows heat to get...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...