How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Eric Your Own Question
Eric
Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 30517
Experience:  20+ yrs. experience as repair shop manager and technician.
3195632
Type Your Chevy Question Here...
Eric is online now
A new question is answered every 9 seconds

You bleed the air out of a cooling system when the car..runing

This answer was rated:

do you bleed the air out of a cooling system when the car is runing or when its turned off?
Hi,

Always bleed it with the car running. If normal bleeding is not getting the air out, use this method:

Raise front end about 8-10" off the ground so that the radiator and resevoir are higher than the heater core(remember, air rises to the top), fill resvoir and run engine for about 10 minutes with heater on high. Turn off engine, allow to cool for a couple of minutes and check resevoir. If below the full mark, repeat process. Do this until the resevoir stays at full mark(usually 2-3 times).
Eric and 6 other Chevy Specialists are ready to help you
Customer: replied 6 years ago.
Thank Eric again . The information he gave me seems to have done the trick. The reservoir is full and so is the radiator. I'll never let Jeffy lube do a coolant change again.
Hi,

glad you got it and have a great holiday season!
Customer: replied 6 years ago.
the problem returned today
Hi,

ok, how long before it starts reading hot? does it matter if it is stop and go traffic or highway driving?

Does it actually overheat, with either steam or coolant bubbling like its boiling in the overflow tank, or just reading hot?
Customer: replied 6 years ago.

I went about two miles this morning and the gage went up to the three quarter mark . I haven't let it go to red hot or irt hasn't gone that far yet . I did what you said yesterday and after I was done I let the car idle for about a half an hour and then took it for a eight mile drive and it was ok . After it went to the high mark this moring I repeated what I did yesterday. It was fine after that I took it on another eight mile drive and it acted normal. I let it set for about three hours ,tok it for a ride and the overheating started again.

Hi,

Ok, this sounds like the new thermostat is defective and is sticking at times. I would have the thermostat replaced again. If a shop did the work, it should be replaced under their warranty