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2000 Cat C12 coolant in oil

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by ichudov, Jul 23, 2019.

Page 2 of 3
  1. Jul 24, 2019 #11
    ichudov

    ichudov Heavy Load Member

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    Also, I will need to drain old contaminated oil and flush it. I have lots of old hydraulic fluid. I would hate to buy 11 gallons of oil just to put it through the engine. Can I, instead, just put 11 gallons of used but clean hydraulic oil , maybe add a gallon of diesel and let the engine idle for 10 minutes?
    thanks
     
    ichudov, Jul 24, 2019
    ichudov, Jul 24, 2019
    #11
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  3. Jul 24, 2019 #12
    SL3406

    SL3406 Medium Load Member

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    It's the water pump. When they fail on C12's it leaks into the crankcase unlike the C15 that leak to the outside.
     
    SL3406, Jul 24, 2019
    SL3406, Jul 24, 2019
    #12
    Intothesunset and ichudov Thank this.
  4. Jul 24, 2019 #13
    ichudov

    ichudov Heavy Load Member

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    How will I be sure that it is the water pump? Drop the pan and see from where it leaks?

    Can I test the water pump if I pull it off the engine somehow?
     
    Last edited: Jul 24, 2019
    ichudov, Jul 24, 2019
    ichudov, Jul 24, 2019
    #13
    Intothesunset Thanks this.
  5. Jul 24, 2019 #14
    tnevin225

    tnevin225 Road Train Member

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    Altorfer CAT - Hammond, IN Go see these guys, Thy rebuild a lot of motors there. Aways did a great job for me. Good Luck
     
    tnevin225, Jul 24, 2019
    tnevin225, Jul 24, 2019
    #14
    ichudov Thanks this.
  7. Jul 24, 2019 #15
    Intothesunset

    Intothesunset Road Train Member

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    I think dropping pan is needed. Another article like this one with same engine a few weeks ago.
     
    Intothesunset, Jul 24, 2019
    Intothesunset, Jul 24, 2019
    #15
    ichudov Thanks this.
  8. Jul 24, 2019 #16
    ichudov

    ichudov Heavy Load Member

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    Berkeley, IL
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    OK, so drop the pan and pressurize coolant to 15 psi? Or just fill with coolant?

    Or, maybe pull the water pump and test it somehow?
     
    ichudov, Jul 24, 2019
    ichudov, Jul 24, 2019
    #16
  9. Jul 25, 2019 #17
    SL3406

    SL3406 Medium Load Member

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    Oklahoma
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    I'd pull the pan and pressurize the coolant. You should be able to see where it's coming from. I don't know of a way to test the water pump off the engine.
     
    SL3406, Jul 25, 2019
    SL3406, Jul 25, 2019
    #17
    ichudov Thanks this.
  10. Jul 25, 2019 #18
    ichudov

    ichudov Heavy Load Member

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    ok will do
     
    ichudov, Jul 25, 2019
    ichudov, Jul 25, 2019
    #18
  11. Jul 25, 2019 #19
    ichudov

    ichudov Heavy Load Member

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    Mar 14, 2012
    Berkeley, IL
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    When we opened the plug on the oil pan to drain oil, this black rubber item fell out, any idea what it is?

    20190725_111802.jpg
     
    ichudov, Jul 25, 2019
    ichudov, Jul 25, 2019
    #19
  12. Jul 25, 2019 #20
    pushbroom

    pushbroom Road Train Member

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    Barrel plug from oil pan. Nothing to worry about. Probably got pushed into the pan when a new one was getting installed. They cover the blank spots for optional dipstick plug locations
     
    pushbroom, Jul 25, 2019
    pushbroom, Jul 25, 2019
    #20
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