Q: Q: Car overheats while idling

asked by on

My car has gone 180,000 miles. Lately, it has been overheating. The problem occurs when the car is idling, like at the traffic light or in park. Then, in just a couple of minutes, the temperature would be in the red zone. Even though the fans are working, the temperature cannot be decreased to a normal level. Also, while in the hot zone, I've noticed that the heater quits working. I checked the coolant level and it seems fine. Several years ago, the cooling system was flushed. Everything works normally when the car is in motion. Also, it might be relevant to mention that the overflow tank seems to have rust particles in it. How can I prevent the vehicle from overheating?

It sounds like you may have a problem with rust an scale build up in the engine. This build up may have worn the impeller on the water pump and this is why it only overheats at low engine RPMs. I would suggest doing a complete power flush of the cooling system. Check the radiator for blockage and then replace the radiator, water pump, thermostat as needed. Before any work is done, have the system pressure tested for any coolant leaks at the corner of the heads and intake manifold and replace the head gaskets and intake gaskets if leaks are found. If you want to have the fault verified, a certified technician from YourMechanic can come to your car’s location to diagnose the overheating issue and let you know what needs repair.

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
  1. Home
  2. Questions
  3. Q: Car overheats while idling

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: 4l60e transmission runs fine until engine warms up then loss of all gears and metal on metal noise from bell housing. What do I do

Hi Mike. Anytime you hear metal to metal coming from inside the bell housing of an automatic transmission, that's typically an indication of damage to the torque converter or flywheel. With 300,000+ miles on your Silverado, it's probably time to...

Q: Transmission over temperature and truck doesn't start.

I have seen this concern with your Jeep Commander before, not only through my own personal experiences, but also from other certified mechanics working on this vehicle. Through some tag team diagnostic skills, we were able to determine that one...

Q: I just bought a 99 Oldsmobile silhouette it was a report car. I was on my way home but as I'm driving I hear a loud whining noise.

The whining noise that you are hearing is either the alternator not working properly or the power steering pump is low on fluid. Check the power steering fluid level and see if the oil is full. Listen for the noise...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.