Skip the auto shop - Our mechanics make house calls

Q: My car is overheating

asked by on

I installed a fail proof thermostat a month or two ago on my car. The car does not overheat on trips less than 25 miles, but on longer trips it overheats. The radiator is full and the cooling fan works as well. I noticed that the coolant tank may be leaking; could that be the problem?

A: I have never heard of a fail proof thermost...

I have never heard of a fail proof thermostat. If your coolant tank has a leak then it may be getting low on coolant. A leaking coolant tank that is unable to hold pressure can also cause the temperature to get higher than normal. The coolant needs pressure to help with the anti-boil properties of the cooling system and its fluid.

Replace the coolant tank and the coolant with a 50/50 coolant/water mix. Check to be sure your fail proof thermostat is opening and at the correct temperature also. Make sure the fans are coming on at the correct temperature with and without the A/C on. If you need assistance with this, contact a professional mechanic who will be able to pinpoint and fix your overheating issue.

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: Coolant leak in a 2002 Cadillac Escalade

The most common coolant leak other owners have had is the water pump leaking. The typical repair is water pump and thermostat replacement. I recommend having a mechanic, such as one from YourMechanic, inspect your coolant leak, which may involve...

Q: Continuous Clunking and thumping while driving.

Good job on the description of the noise. What you are describing is the noise that a wheel bearing makes when it is worn out. The noise will change pitch when steering left and right. The bearings for your PT...

Q: Windshield wipers not moving.

The wipers on your vehicle are powered by a multi-speed motor that is controlled by the wiper switch and a relay module. A set of gears, crank arm, and linkage attach the motor to the wipers. If you hear the...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...