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

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: What is 2 key detected

If you have two programmed keys inside the vehicle or on your keyring than the computer detects this. You should not have two keys near vehicle at the same time.

Q: Indicator lights of park and drive are on. The engine don't want to start with the lights on.

Hi there. The orange gear light that appears on the dash is the warning light for the transmission. First check the computer (ECM) and see if there is any stored codes for the transmission or transfer case (if your vehicle...

Q: 05 XL-7 CAN FRONT CRANK SEAL BE REPLACED WITHOUT REMOVING TIMING COVER?

The seal has to be accessible (that is visible and there is enough room to pry it out) on removal and, as well, there has to be enough space to press it back in using an appropriate seal installation tool....

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...