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pressurized cooling system ??

Discussion in 'The Hokey Ass Message Board' started by orphanautomill, Oct 8, 2011.

  1. orphanautomill
    Joined: Jun 21, 2010
    Posts: 156


    I just installed a Afco aluminum radiator in my truck, and am looking for info on the correct installation of an overflow tank. Does the overflow need to be sealed? What I have read indicates that it does not...

    The one I have has a vent, and today on a longer trip it started boiling over.

    Need to tackle this tomorrow ...

  2. 69fury
    Joined: Feb 24, 2009
    Posts: 1,420


    no- your overflow bottle does not need to be sealed. just make sure the dip tube is long enough to reach down near the bottom.

  3. nexxussian
    Joined: Mar 14, 2007
    Posts: 3,251



    Make sure your overflow tank is large enough to accept however much expansion your system has, plus a little extra to keep it from sucking air every time it cools off.

    So if you figure your system cycles through a pint (just a random volume I picked for an example, no idea if it's reasonable for your system) from cold to hot, use a two pint container and leave a half pint in it, so you have a little air space when it's full so you don't have a "spillage" issue when hot.

    If it went through a quart, I would still only go a pint bigger.
  4. Sir, are you asking about a coolant recovery tank or just a simple overflow tank?
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