'94 9400 losing coolant

Discussion in 'International Forum' started by kev2809, Sep 25, 2016.

  1. kev2809

    kev2809 Light Load Member

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    Truck was losing a gallon a day and would start to overheat (205ish)...i did a radiator pressure test and seen the radiator coolant tank had crazy leaks. replaced the tank, and rebuilt the radiator. filled it up with coolant and water...did another pressure test and didnt see any leaks. ran it for a few days and same thing...i had to add 4 gallons of water to fill it back up.

    i dont see water leaking anywhere. friend suggested the oil cooler?

    the oil looks great from the dipstick, no milky look or anything. also noticed my breather tube on the head is now dripping water. not sure if its related or not.


    1994 international 9400 with cummins n14 engine
     
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  3. AModelCat

    AModelCat Road Train Member

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    Sounds like it might be burning it. Any noticeable white smoke?
     
  4. kev2809

    kev2809 Light Load Member

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    hmm..ill have to check tomorrow. i cant see my stack while im driving but ill have someone look for me.
     
  5. 062

    062 Road Train Member

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    Sounds like a head gasket or cracked head. Are your heater valves open? If so check the hoses under the truck.
     
  6. kev2809

    kev2809 Light Load Member

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    i think i closed them off after winter...should they be open?
     
  7. 062

    062 Road Train Member

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    If they are open,the leak could be under the cab.
     
    magoo68 Thanks this.
  8. Heavyd

    Heavyd Road Train Member

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    If you can't find any leaks, fill the coolant to full mark and run it for an hour over an area of clean payment, then back the truck up and see if anything is on the ground. Hopefully this is just an external leak at this time and not internal.
     
  9. kev2809

    kev2809 Light Load Member

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    well i had a couple hours before work today since it rained yesterday...so i went down to oreilly and grabbed that radiator pressure tester again. topped it off and pumped it up to 16 psi. now i see water slowly dripping from the bottom driver side of the intercooler ( i believe its called). its the thing bolted on the back of the radiator that one top side has the turbo going to..and the top driver side goes to the driver side of the motor. any thoughts?
     
  10. Heavyd

    Heavyd Road Train Member

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    Probably the rad still leaking somewhere and it is dripping down the air to air.
     
  11. kev2809

    kev2809 Light Load Member

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    i pulled the pressure tester off and have been sitting there without it...went back out and this thing is just dripping water by itself. its not touching the radiator whatsoever..so the water is coming from this it seems. does this make sense? whats weird is i dont see coolant coming out of it...only water. when i installed the radiator back in, i put 6 gallions antifreeze and 4 gallons water. i know antifreeze is still in there because i loosened the top hose on the radiator and antifreeze started coming out.
     
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