Skip the auto shop - Our mechanics make house calls

Q: Temperature guage reading high when idle

asked by on

After driving my van for a while.... while idling at a stop it will start to go high on the temperature gauge. If I turn it off at this point it hesitates to start. I have had a mechanic out.. he claims to have checked the thermostat with heat and cold water and it is working fine. and he said the fan is working fine. The mechanic said he drained the radiator fluid and refilled it ( i think he called it bleeding ) and when he was done it seemed to work fine again, we had success, that there might have just been air in the system. according to him..... Wel not but a day or two later it began doing it again. I have checked the reserve and the water was empty but we never notice a leak.... this is actually the second time since this problem began that it was empty.... the mechanic is telling me it MAY be the water pump and it will be a $600 repair because of how difficult it is to get to in labor.. and then he still cannot guarentee that is the problem.... any advice??? Please HELP...

My car has 150000 miles.
My car has an automatic transmission.

A: With your symptoms, the vehicles water pump...

With your symptoms, the vehicles water pump is a likely culprit. With a working coolant thermostat and radiator fans, the next parts to suspect are a fluid leak or malfunctioning water pump. If the vehicle has been overheating, I will recommend the thermostat be changed with the water pump job. The cost is so high because the water pump is driven by the timing belt and it would mot cost effective to replace the timing belt assembly at the same time to prevent paying the labor twice. Hire one of our mobile experts to assess your overheating issue and estimate a repair. We use very detailed procedures to track down problems for the right fix the first time.

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: Can no longer accelerate

This concern could be caused by a number of problems. It could be related to the Electronic Stability Control (ESC) system or the throttle-by-wire system. If there are no lights illuminating on the dash, it may be tricky to diagnose...

Q: Can't shift into high gear

This vehicle is equipped with an electrically controlled transmission. The most likely cause of not being able to shift to high gear is low battery voltage, or a faulty shift solenoid. As for the Check Engine Light on the transmission,...

Q: When I stop and then start to accelerate the car jumps and lunges and doesn't seem to increase speed as it should.

Hello. Thank you for writing in. Typically vehicles jump and surge due to spark or fuel issues. The computer is designed to keep the engine running within certain ranges, and when the vehicle doesn't have what it needs, it will...

Related articles

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...
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...