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

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・Save up to 30%

Get a quote

What others are asking

Q: My car will not start. It won't start even after multiple jumps. But the lights still comes on, even though they're dim

This may be a result of a weak battery or a failing alternator. As you may know, your alternator is what is responsible for keeping your car's battery charged. When this is not working properly, this may result in a...

Q: I recently got a second hand 2001 santa fe from Europe and it has a water pump problem, can I find it in Mali (West Africa)

It may be possible to order parts from the US and have them shipped to you. The shipping will take a while and may not be inexpensive. You might have to call the customer service line of the vendor to...

Q: Car overheating; thermostat

Hello! A common reason for most vehicles to overheat is a faulty thermostat. However, on 350Z's, the factory fans are known to fail prematurely and cause an overheating scenario. I suggest checking the performance of the cooling fans and thermostat....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...