Series 60 12.7 coolant put of overflow

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by bruce25, Aug 4, 2020.

  1. bruce25

    bruce25 Light Load Member

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    My coolant will shoot out overflow hose when under full throttle climbing hills and it shoots out alot of coolant. i did water bottle test and there are bubbles not alot but it was done at idle. I took air compressor air hose off and still getting bubbles compressor has just been changed recently. Temperature is great no overheating trucks pulls without issues. No oil in coolant could compression be entering coolant system? Time for head gasket.
     
    jamespmack Thanks this.
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  3. bad-luck

    bad-luck Road Train Member

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    Two things will do that. An head gasket, or air from the air compressor. Just taking the air hose off of the air compressor won't rule out the air compressor
     
    Rideandrepair and Bean Jr. Thank this.
  4. Rideandrepair

    Rideandrepair Road Train Member

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    You could try looping coolant hoses, or crimping them off with flat vice grips. Don’t run compressor long without cooling, though. I wouldn’t bother. The test you did, is good enough, comparing it with air line hooked up, and disconnected. Same? Good enough. Shouldn’t be any bubbles at all. Either the heads cracked, or gaskets leaking due to a dropped liner, or maybe just a gasket. You don’t mention what yr. engine/Truck, or mileage
     
    lwlevens and nikmirbre Thank this.
  5. maricela333

    maricela333 Bobtail Member

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    working on convention dd15 freithlineer cascadia 2013 and we install detroit 11.1 but gauges is not working this ecm only have j1587 need to now if is gauge for RPM or speed gauge the work on this convertion
     
  6. bad-luck

    bad-luck Road Train Member

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    I am just curious, I am not a mechanic I have just been around a while. Isn't it possible that if the head gasket on the air compressor is leaking that could be putting air into the coolant?
     
    Rideandrepair Thanks this.
  7. jamespmack

    jamespmack Road Train Member

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    Since you failed to mention model and year. Some Columbia's and Century's had air controlled coolant valve for the bunk. They were known to pressurize cooling system. Seen one get rebuilt twice from a FL dealer over that valve.


    You have isolated the compressor, and dont have a bunk air controlled thermostat.

    You have head or liner problem.
     
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  8. jamespmack

    jamespmack Road Train Member

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    Add, I know you removed compressor outlet hose. But you really need to plug off compressor coolant lines. Temporary will not damage it.

    I also suggest a exhaust gas test kit from napa. Very simple. And it you have exhaust gasses in the coolant, you know you have a inblock problem.
     
    spsauerland and Rideandrepair Thank this.
  9. bruce25

    bruce25 Light Load Member

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    An update I changed overflow cap and not getting coolant pushed out anymore. But tell me if this is normal after engine is hot I slowly open a cap pressure releases and then I hear coolant coming back from thermostat housing untill it overflows ? You can hear it gurgling never seen this before
     
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