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3406b pushing water out overflow.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Wildcat74, Mar 25, 2011.

  1. Mar 25, 2011 #1
    Wildcat74

    Wildcat74 Medium Load Member

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    Jul 15, 2008
    Omaha, NE
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    If I've got my radiator completely full my truck will push fluid out of the overflow tube until it's dropped down 2 inches or so below the filler neck at which point it pushes no more. Is this something to worry about?
     
    Wildcat74, Mar 25, 2011
    Wildcat74, Mar 25, 2011
    #1
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  3. Mar 25, 2011 #2
    canuck in da truck

    canuck in da truck Road Train Member

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    Aug 6, 2010
    western pa
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    its probabely just expanding with temp and going out--as long as it is keeping pressure and not heating--wouldnt worry about it
     
    canuck in da truck, Mar 25, 2011
    canuck in da truck, Mar 25, 2011
    #2
  4. Mar 25, 2011 #3
    The Truckist

    The Truckist Medium Load Member

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    Sep 11, 2010
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    I had a 425 B model did the same thing. Not to worry as long as it don't keep pushing it out.
     
    The Truckist, Mar 25, 2011
    The Truckist, Mar 25, 2011
    #3
  5. Mar 25, 2011 #4
    Pablo-UA

    Pablo-UA Road Train Member

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    Borispol, Ukraine
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    it is normally, especially when it is cold outdoors.

    You fill radiator when it is -5 dgr c and engine normal temperature is 93-97 dgr c... over 100 dgr C difference.

    When it is +20 dgr c - difference is about 70 dgr.

    When it is really cold, below -15 dgr C, if radiator was filled in summer fluid goes down and engine stalls with engine protection, driver adds 3-5 cm of level and when engine is hot coolant leaks out
     
    Pablo-UA, Mar 25, 2011
    Pablo-UA, Mar 25, 2011
    #4
  7. Mar 25, 2011 #5
    Heavyd

    Heavyd Road Train Member

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    Yes, normal. Fluids will expand when increasing in temperature. I has to go somewhere. 2" below the neck is perfect.
     
    Heavyd, Mar 25, 2011
    Heavyd, Mar 25, 2011
    #5
  8. Mar 25, 2011 #6
    Wildcat74

    Wildcat74 Medium Load Member

    354
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    Jul 15, 2008
    Omaha, NE
    0
    Thought that this was the case but wanted to be sure. Thanks all!
     
    Wildcat74, Mar 25, 2011
    Wildcat74, Mar 25, 2011
    #6
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