Flushing the cooling system

Discussion in 'Drivetrain, Exhaust and Electrical' started by docs302, May 15, 2018.

  1. docs302

    docs302 TMO Race

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    After draining the coolant and replacing the thermostat, gaskets and most of the hoses, I no longer have a leak. But after the initial filling of the holding tank, I am guessing that I will need to start the car to add the rest of the fluid. I want to make sure before I start the car that I am indeed doing the right thing.
    1) Start car and watch holding tank drain
    2) Continue to add fluid
    3) When tank stays at proper level and engine is warm...stop.
    4) Check for leaks
    5) Close cap

    Is it that simple??
     
  2. TMSBOSS

    TMSBOSS TMO Addict

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    Sort of.
    Hot fluids will need to cool before you open reseroir.
     
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  3. docs302

    docs302 TMO Race

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    Ok, makes sense. Just want to make sure there isn't a special step I am missing. Haven't drained and filled radiator in many many years.
     
  4. TMSBOSS

    TMSBOSS TMO Addict

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    Just be patient. It may take 3-4 cycles before the fluid level stabilizes.
     
  5. docs302

    docs302 TMO Race

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    Thanks.....I feel much more confident this will be fine.
     
  6. Grant 302

    Grant 302 OPM Spent: $509,979 Moderator

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    I wouldn't drive it until you are sure it's full again. Air in the engine leads to hot spots.
     
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  7. BigTaco

    BigTaco TMO Addict

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    It's difficult to get all of the air out in one shot; just take the advice given and don't be surprised if you have to top off a few times before the level stabilizes.
     
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  8. k98dave

    k98dave TMO Addict

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    Always helps to raise the right side nose of the car a little to have the tank higher to help trapped air out of the system
     
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  9. Big Black

    Big Black Good, fast<del>, and cheap</del>

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    ^ that's what I do...make sure you get the good stuff, Zerex G-05
     
  10. docs302

    docs302 TMO Race

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    Thanks for all the information.......TMO rules!
     
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