Skip the auto shop - Our mechanics make house calls

Q: Water pump / still over heating

asked by on

I recently replaced my water pump but my gauge still says it's over heating but there's not one bit of smoke coming from it and it still holds water and anti freeze and leaks a little. When I brake hard it goes straight to the red zone, I pull over and turn off the car for 10 minutes and when I turn it on, its in the middle of the gauge then when I take off, it starts over heating in about 5 minutes.

My car has 250000 miles.
My car has an automatic transmission.

A: This can be caused by a number of things su...

This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or sometimes not at all. When this happens you will notice a temperature spike and drop occasionally as the fan comes on and off. When your thermostat is not working properly or is stuck closed, this will not allow the coolant to properly circulate through the engine, which may cause the engine temperature to fluctuate erratically or in some cases just remain hot. I would suggest having an expert from YourMechanic come to your home to diagnose your cooling system.

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: Replaced battery lights and radio on but car won't start

Recheck your work and make sure the battery terminals are clean and tight. Do not wrench all the way down on the fastener, just tighten and wiggle the clamp until it won't move on the terminal anymore. Sometimes a failed...

Q: Transmission isn't shifting properly

It sounds like you have a transmission leak somewhere that is causing the system to get low. The transmission will not shift correctly if the fluid is low or if you put in the incorrect fluid. You should have the...

Q: Having trouble starting consistently

Hi There, This may be related to many different possibilities, some of which may be related to a lack of spark or possibly timing issues and some of which may be related to a fuel delivery problem or a combination...

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...
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...