How to Bleed Coolant

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

  1. COPO

    COPO Veteran Member Lifetime Gold Member

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    It should increase at idle. You can try another thermostat. 180 or 185. If you have a 185 in it, while driving it shouldn't go higher than 190-195 on a real hot day. When it's cooler out and you have a 185, then the temp won't go above your 185 thermostat. If you do then you have other problems. Do you have 50/50 water/antifreeze mix? When was the last time you flushed the cooling system? Got a shroud? If you have an aftermarket water pump that's pushing more water than a stock pump then your pump is the problem.
     
    Last edited: Feb 22, 2013
  2. Philip

    Philip Veteran Member Lifetime Gold Member

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    Could be a thermostat is hanging up when the flow of water is greater.
     
  3. motor60

    motor60 Member

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    Going to try a performance 160 stat tomorrow and see how it does. I dont have any leaks in my system. So, im hoping this will solve my problem. If not, then im taking out the thermostat and leaving it the way it was. I didnt have any problems with heating without a stat.
     
  4. maxpsi

    maxpsi Veteran Member

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    Sorry to dig up an old thread, but isn't there a tool out there to expedite this process. I've lost patience for the old school method.
     
  5. twozs

    twozs Veteran Member

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    these cooling systems are not that complicated . pretty much post # 3 should do it . you may have to check and fill through 2 heat / cool cycles . there are no cross over tubes or small little passages in the heads and block for air to get trapped . todays cars have more aluminum parts ( like block and heads ) that require more cooling than cast iorn .
     
  6. maxpsi

    maxpsi Veteran Member

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    Maybe my water pump is bad. My bottom hose never got warm.
     
  7. qn60e6

    qn60e6 Veteran Member

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    reversed flow water pump?
     
  8. maxpsi

    maxpsi Veteran Member

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    Then it would be pushing coolant up past the thermostat, through the upper radiator hose, and mostly likely surging coolant out of the radiator fill port on top of the radiator?
     
  9. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    [​IMG]
    works for me every time, no mess....
     
  10. Dave Nelson

    Dave Nelson Veteran Member

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    Never saw that Scott, where did you get it?
     

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