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Overflow tank drains coolant

Discussion in 'Volvo Forum' started by stocktonhauler, Nov 18, 2012.

  1. Nov 18, 2012 #1
    stocktonhauler

    stocktonhauler Medium Load Member

    396
    172
    Dec 9, 2007
    Stockton, C
    0
    After rebuilding the engine, I put in a new coolant overflow tank, since the old one seemed to be leaking. Now though, the driver's side of the tank fills up with coolant and drains it to the ground. Then, I have to add coolant to the passenger side of the tank. Cummins evaluated the situation with a dyno test and vigorously claimed nothing was wrong with the engine. But, regardless of what they say, I find the engine runs warm, and the coolant tank needs a frequent refill especially on warm days. Maybe though, the coolant tank chambers aren't returning the overflow to the primary chamber somehow?
     
    stocktonhauler, Nov 18, 2012
    stocktonhauler, Nov 18, 2012
    #1
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  3. Nov 18, 2012 #2
    snowwy

    snowwy Road Train Member

    20,591
    13,311
    Jul 6, 2009
    0
    try a new radiator cap. if the cap doesn't hold pressure. water usually flows into the overflow and keeps flowing. the engine will also run warmer. for 2 reasons. the cap doesn't hold pressure. and your losing water.

    once the engine cools down then it's sucked back into the radiator.

    try a new cap and go from there. it's the cheapest and easiest thing to try.
     
    snowwy, Nov 18, 2012
    snowwy, Nov 18, 2012
    #2
  4. Jan 16, 2013 #3
    Damage

    Damage Light Load Member

    67
    17
    Jan 13, 2012
    Newark, Nj
    0
    Funny as it sounds I have seen a bad air compressor do that. The way to tell if it is the air compressor is to see if the cooling system is still pressurized even after the tractor has cooled down(let sit for over an hour or two).
     
    Damage, Jan 16, 2013
    Damage, Jan 16, 2013
    #3
  5. Jan 17, 2013 #4
    Jetsr6

    Jetsr6 Light Load Member

    131
    46
    May 20, 2011
    Mechanicsville, VA
    0
    That happend to me 560000 on original air compressor. Was a pain until I figured it out.
     
    Jetsr6, Jan 17, 2013
    Jetsr6, Jan 17, 2013
    #4
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