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・Fair and transparent pricing

Get a quote

What others are asking

Q: Car is running hot after the water pump and sensor been changed

Anytime a car overheats, the thermostat should be changed because the overheating itself can damage the thermostat. Also, anytime a water pump is replaced, the thermostat should be replaced. I would evaluate the thermostat first as a potential cause of...

Q: my power steering fluid in the reservoir has bubbles and i just replaced the pump, does it need to be bleeded

Hello, thank you for writing in. The power steering pump should not need to be bled. When the last pump was changed air was introduced into the system. The air is likely not working itself out. If the bubbling becomes...

Q: Upstream O2 sensor for Outlander 2009.

Hi there. The oxygen sensor is positioned in the exhaust pipe and can detect rich and lean burned fuel mixtures. They produce a voltage that sends a reference signal to the computer as an on and off switch. Rich burned...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...