Skip the auto shop - Our mechanics make house calls

Q: Car runs hot and antifreeze leaks

asked by on

My car is running hot. The antifreeze is leaking. The car will start, but it runs hot very quickly. The air conditioner also goes in and out when the car is running hot.

First we have to find out where the coolant is leaking. That could be the cause of the over-heating, or just another symptom. Engines that heat up and run hot very quickly is a common symptom of the head gasket leaking. Combustion gases are entering the cooling system. Engines that are turbo charged are more prone to this because of increased combustion pressures. The AC working sometimes or not at all is normal with a hot engine. The computer disables the AC when the engine is too hot. AC adds a tremendous amount of heat to the engine compartment. I recommend having a professional locate any leaks and make the repairs necessary to get your car back safely on 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!
  1. Home
  2. Questions
  3. Car runs hot and antifreeze leaks

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 2001 Acura MDX is stalling intermittently. It usually takes a jump start to get it going again.

It sounds like you may have a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator charges the battery while the engine runs by generating amperage and recharging the battery while the engine turns...

Q: timing

Hi there. What you're asking for is not a free recommendation that we offer. Plus, since we do not offer repair services in the US Virgin Islands, we can't come to your location to help you complete the timing set-up...

Q: Info

Besides the normal wear components leaking like the water pump, this engine is known for leaning coolant from the radiator, intake manifold and the head gaskets/heads. You should have the coolant system pressure tested to see where the leaks are...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...