Skip the auto shop - Our mechanics make house calls

Q: Car over heats

asked by on

The car overheats but when I bleed the bleeder above the water pump it returned to normal. When the engine is cold and not running if you remove the radiator cap you will have a vacuum that sucks the coolant and Air into the system. No oil in the coolant no cloud of white smoke. If it runs at idle with the radiator cap off the thermostat will not open and the coolant reservoir overfills. It runs with no problem as long as I keep bleeding the bleeder above the water pump every 10 minutes or so. Pressure testing the coolant system to 15 PSI for 30 minutes. It held pressure. I tried to block tester with the liquid, but the Reservoir would overfill before I could complete the test. I have changed the thermostat and I change the water pump.

My car has 137000 miles.
My car has an automatic transmission.

A: Hi there: The overheating issue may be cau...

Hi there:

The overheating issue may be caused by air bubbles trapped inside the cooling system. The fact that you’re receiving that vacuum sound when you open the radiator cap indicates that you’ve got some air trapped in the system. This is common when radiator or water pump repairs are made and the priming process is not followed precisely as recommended by Chevrolet. If you need help trying to diagnose this overheating issue, one of our professional mechanics will be happy to help you.

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: 2009 Nissan Murano has the P0420 trouble code. It says the normal bank 1 issue, but now it says short to VBAT. What is that and how to fix it?

Hi there. From the description you have provided, for your vehicle's P0420 trouble code. I suspect the O2 (Oxygen) sensor you replaced has created an additional concern for your vehicle. Either, the O2 sensor is incorrect by application or is...

Q: Clear oil leak

This may be related to the condensation created by the AC system. When the refrigerant is activated in your AC system, this generates an intense amount of cooling which is where your cool air comes from. As this happens, this...

Q: how difficult would it be to update the engine?

Hi there. This question would not be able to be answered for you without a thorough research into the two engine differences. The 5 to 7 year difference would mean the intake and exhaust along with the computer components and...

Related articles

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...