Skip the auto shop - Our mechanics make house calls

Q: Car overheating due to radiator crack

asked by on

The temperature gauge in my car is rising when I idle or have the AC on. I found a crack in the radiator and had it sealed in the meantime.

A: When your engine is idling, the vehicle is ...

When your engine is idling, the vehicle is likely stopped which lowers the airflow through the radiator. The more airflow the radiator receives the more likely the engine is to remain cool. When the air conditioning is turned on the engine must work harder to run the A/C compressor and will therefore heat up more. A coolant leak in the radiator is most likely the cause of your issue. At the soonest possible moment I would recommend having your radiator replaced in order to prevent engine damage from overheating or being stranded on the side of the road.

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

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: Car starts, but not going sometimes

It sounds to me like the transmission is not engaging right away. The most common cause for this would be low transmission fluid. I would check it asap, and if it is low, perform a transmission fluid service. More damage...

Q: Stalling after fueling

Without having inspected the vehicle myself, I can say it is possible the code for a faulty O2 sensor may have been present,either due to the sensor being faulty itself, or registering incorrect readings due to the following. It is...

Q: Car overheats

Hi. The cooling system is designed to keep your engine at normal operating temperature (approximately 190-210 degrees fahrenheit). When this doesn't happen, it means there is a failure somewhere in your cooling system. The main cooling system components are the...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.