Skip the auto shop - Our mechanics make house calls

Q: The problem I'm having is overheating and then water starts to come out of the overfill hose on the reservoir.

asked by on

A Mechanic I went to told me to take the thermostat out. Which I did, and it doesn't seem any better, maybe even worse

My car has 107000 miles.
My car has an automatic transmission.

Hi there. If you have removed the thermostat and the engine still overheats, then there could be an issue with the water pump or the head gasket. With the engine running at operating temperature before it gets hot, check the upper and lower hose and see if there is any temperature change. The upper hose would be warmer than the lower hose. If he hoses are about the same temperature, then the water pump is working. If the hoses are different temperatures, then the water pump may not be working. Also, get a block tester kit from a local parts store and use it to check the steam coming out of the reservoir with the cap removed. Be very careful as coolant can burn skin when it is very hot. If the blue chemical turns from blue to yellow or green, then there is carbon in your coolant, which would mean that the head gasket is burned. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose 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
  1. Home
  2. Questions
  3. The problem I'm having is overheating and then water starts to come out of the overfill hose on the reservoir.

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 leaking massive amounts of antifreeze, and then proceeds to overheat.

Hi, thanks for writing in. It would be highly recommended that you not drive the vehicle until the leak is located and fixed. One and a half gallons is basically the amount to fill the entire cooling system, so the...

Q: Installed a new battery and the battery light is still on

This may be a sign of a failing alternator or voltage regulator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while the engine turns the...

Q: Thermostat not working

Greetings! I'm inclined to think that the problem will be with the coolant temperature sensor. Have a technician test the coolant temperature sensor and inspect its electrical circuit. I'd recommend getting some help from a certified technician. They will have...

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...
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...
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...