Q: temp gauge in normal range, turn off car and electric fans are running. Open hood and coolant overflow tank is overflowing

asked by on

Car seems to run fine.....was just surprised by the fans running on an 90 degree day in Virginia, and the overflow tank full with pressure behind it.

My car has 230000 miles.
My car has a manual transmission.

The cooling fans running on a 90 degree day is fairly normal for most cars. The coolant overflow full with pressure is also normal. As the heat of the coolant heats up and cools down this causes an expanding and contracting causes the pressure to build in the overflow tank. As long as the temperature remains normal this is normal.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. temp gauge in normal range, turn off car and electric fans are running. Open hood and coolant overflow tank is overflowing

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: Idling high - 1993 Saab 9000

The Idle Air Control valve and turbo-bypass valve in your model are common suspects for vehicle stalling as you describe. A professional mechanic, like Your Mechanic, can diagnose and repair this problem including replacing the valves.

Q: Engine gets hotter sitting in traffic - 2007 Chevrolet Malibu

Hi there. This could be normal operation, but the cooling fans could be starting to have issues. Perform a visual inspection of the cooling fans to make sure when they come on that they operate properly; they should move a...

Q: disaster

Leaks can be repaired and some leaks are frankly trivial issues in terms of difficulty of repair and cost. So, it's only a disaster if it's a "bad" leak where bad means "costly" to repair. As long as you didn't...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.