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Technical Overheating

Discussion in 'Traditional Hot Rods' started by old trucke, Aug 5, 2024.

  1. G-son
    Joined: Dec 19, 2012
    Posts: 1,472

    G-son
    Member
    from Sweden

    I wouldn't worry about it boiling when the gauge is at 210. Car gauges are usually not high precision, so the numbers can be way off from actual temp.
     
    Unkl Ian likes this.
  2. Unkl Ian
    Joined: Mar 29, 2001
    Posts: 13,509

    Unkl Ian

    A 50/50 coolant mix will boil at 223 F.

    Sounds like more than one problem.
     
  3. Unkl Ian
    Joined: Mar 29, 2001
    Posts: 13,509

    Unkl Ian

    How is it possible to have too much coolant ?
     
  4. G-son
    Joined: Dec 19, 2012
    Posts: 1,472

    G-son
    Member
    from Sweden

    Easy. Fill over the maximum level.
     
    gimpyshotrods and Motorwrxs like this.
  5. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 5,976

    2OLD2FAST
    Member
    from illinois

    Uhh , overfill the system ....
     
    Just Gary likes this.
  6. jimmy six
    Joined: Mar 21, 2006
    Posts: 16,653

    jimmy six
    ALLIANCE MEMBER

    If this an idle situation only you need to see if coolant is moving thru the radiator at idle. Start with a cold or cool engine. Lower the level 1” in the radiator and leave the cap off. Start the engine and let it idle in drive if an automatic periodically checking the thermostat housing with a temp gun. When you are positive the thermostat is open, is there any movement of coolant? If not slightly raise the idle maybe 100+ rpm, if there is now coolant movement you need to increase the speed of the water pump with a smaller pulley or larger on the crankshaft. If you have movement at idle you need a bigger or more efficient radiator.
    Not sure on a SBC but on YBlock Ford it’s a simple fix that works everytime…
     
    6inarow likes this.
  7. Unkl Ian
    Joined: Mar 29, 2001
    Posts: 13,509

    Unkl Ian


    I don't know what you guys we taught, but on my old cars,
    I always filled the rad to the top.
    Late model junk with an overflow bottle, the rad is filled to the top,
    and the bottle filled to the indicator mark.
     
    Last edited: Aug 18, 2024
  8. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 5,976

    2OLD2FAST
    Member
    from illinois

    Every cooling system must have expansion space . Old stuff puked on the ground ( low pressure systems) & nobody much noticed .
     
  9. jimmy six
    Joined: Mar 21, 2006
    Posts: 16,653

    jimmy six
    ALLIANCE MEMBER

    And you left the radiator about an 1” low. When I bought my 56 Ford with a #7 cap I filled it up because I forgot.. I didn’t put a puke tank on for 2-3 years so it ran low until that time.
     
    2OLD2FAST likes this.
  10. Since your vehicle started life with an inline 6 cylinder engine I thought I might ask how far is the fan from the radiator? Maybe a spacer would solve the problem.

    Charlie Stephens
     
    dirt t, Unkl Ian and 69fury like this.
  11. 69fury
    Joined: Feb 24, 2009
    Posts: 1,693

    69fury
    Member

    Good point. Properly located spacer and shroud should do the deed.

    -rick
     
    Just Gary and Unkl Ian like this.
  12. old trucke
    Joined: Mar 14, 2013
    Posts: 38

    old trucke
    Member
    from ohio

    I fabricated an shroud . At idle the fan really pulls the air through the radiator. At 85deg day ,runs at about 180 degs. Trucke
     

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