Skip the auto shop - Our mechanics make house calls

Q: Suddenly want to over heat right away once started.

asked by on

My car was running fine. Then all the sudden it started to over heat like crazy. I can't find any leaks, I did the boil test on the thermostat and its working fine. Engine fan is working. But when I turn the heat on only cool air comes out now since it started overheating. And I can hear water boiling. Is that the water pump being bad? Can a water pump suddenly go out?

My car has 218674 miles.
My car has an automatic transmission.

The easiest and cheapest thing to do is to replace the water pump and thermostat. These would be my first suspicions. Check the radiator to see if the fan is working properly by putting a piece of paper in front of the A/C condenser with the engine running to see if the fan will hold the piece of paper to the condenser or if it falls down. This will tell you if the fan clutch is not locking in.

Replace the fan clutch with the water pump replacement if you go through with it. If you have the electric fan, just checking to see if it is coming on will be good enough to know if it’s faulty. If you end up replacing the water pump and thermostat the system should not overheat, consider seeking help from a certified technician if you need assistance with these services.

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

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 makes noise over 30 mph

Several components can cause strange noises during vehicle operation. The sluggish symptom points to a lack of power, which can come from a fault in the engine or transmission as the engine makes the power and the transmission puts that...

Q: Truck has began stalling from the air filter. Recently replaced it an hour ago and seems to still stall at 2600rpm

You should have the engine scanned to see if the mass airflow sensor (MAF) was damaged from the water or debris from the air filter. The MAF has a hot and cold internal sensor and can get damaged from excessive...

Q: 2000 Mercury Mystique ocassionally only cranks but couldn't start

Hello. Thank you for writing in about your 2000 Mercury Mystique. There are a couple things here that I recommended having a technician check to diagnose the cause of the the no-start condition. The fuel pressure would have to be...

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...
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...
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...