Skip the auto shop - Our mechanics make house calls

Q: I have an overheating problem. Its not the fans! With the radiator cap off I can't really see the fluid flowing until I hit the gas.

asked by on

I have replaced the clutch fan with electric fans . sometimes it doesn't get over the N. (NORMAL). I've started the car with the rad cap off and it didn't blow water out. So it's not the head gasket. I'm trying to figure out whether it's the water pump. The T stat... Or the Radiator. And I dont loose water until it seems like it's backing up and overfilling and flowing out of the over flow jug. Boiling water. That's when it over heats. Any ideas. Thanks I advance.

My car has 174000 miles.
My car has an automatic transmission.

A: Hi there - lets look at the behavior overal...

Hi there - lets look at the behavior overall. Did you replace the clutch fan with electric fans because of an overheating issue? If so, that fundamental issue is likely still present. If temp rises quickly to overheat (matter of a few minutes, even at idle), thermostat is stuck shut, or - there is an air pocket in the cooling system (if the system wasn’t bled properly after work where the coolant was drained) - that will cause fairly violent "boiling" inside the engine, and blow water/steam out of the overflow jug.

A blown headgasket can just "superheat" the coolant over 5-15 minutes without "blowing" water out under pressure if the leak is small enough. You can chemically test the coolant for the presence of combustion gases. If you make the fans run all the time does it still overheat? Does it only overheat very slowly over time? If so, it may just be a clogged radiator (inside or out).

I would recommend having your car’s overheating issue inspected by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

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: It starts smoking from the water pump .

It sounds like there is coolant leaking from the water pump and/or the water pump bearing is seizing causing the pump to run slowly (that would account for the overheating) and possibly causing a lot of friction with the drive...

Q: My temperature is reading cold, almost to the bottom. Is this normal?

Hey there. The cold reading could mean that your thermostat is stuck open or the cooling fan is running all of the time. It could also mean a problem with the sender or gauge. Have a mechanic diagnose the cause...

Q: Car key won't turn in ignition

Hello, thank you for writing in. A battery inspection is a great place to start. You can remove it and have it tested, attempt to jump start the vehicle, or test the battery in the vehicle with a voltmeter if...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...