How to Bleed Coolant

Discussion in 'Troubleshooting & Diagnosis' started by motor60, Nov 18, 2011.

  1. motor60

    motor60 Member

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    How do you bleed coolant to get all air pockets out?
     
  2. frankz

    frankz Veteran Member

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    I find the best method is to fill the motor thru the t/stat housing and then fill the rad.
     
  3. Fbird

    Fbird Veteran Member Lifetime Gold Member

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    ^^^^burp^^^^
     
  4. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    Fill, run engine until warm (radiator cap off), refill.

    I have little holes drilled in my thermostat so air doesn't get trapped in the engine.
     
  5. High Country Z

    High Country Z Veteran Member

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    Raising the front of the car slightly with a floor jack with the cap off while it's running will help if it's stubborn to get all of the air out.
     
  6. Rene Melten

    Rene Melten Veteran Member Lifetime Gold Member

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    That's got to be the best tip. When filling it with the t-stat housing off too, (with engine not running of coarse).;)
     
  7. motor60

    motor60 Member

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    How do I know if I got all the air out?
     
  8. COPO

    COPO Veteran Member Lifetime Gold Member

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    When it stops the burps. You'll eventually see the water running through the cores.
     
  9. Philip

    Philip Veteran Member Lifetime Gold Member

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    The air will naturally bleed out itself. Chevy engines have thermostat bypass ports it is just a slow process. One or two heat cycles will have all the air out if there are no leaks in the system.
     
  10. motor60

    motor60 Member

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    ok, car cooled down to approx. 190 but still heats up to approx. 220 when driving around. Then starts to cool at idle again. Weird, but why does it do that?
     

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