KW T2000 2002 CAT C15 thermostat problem

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Karicz, Apr 22, 2013.

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  1. Apr 22, 2013 #1
    Karicz

    Karicz Bobtail Member

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    Jun 26, 2010
    Chicago
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    I change thermostat at CAT C15 and now water temperature going up and down. From 195 to 175 all the time. I thing is air in the system but i dont now how can take it out. Any help? Thanks
     
    Karicz, Apr 22, 2013
    Karicz, Apr 22, 2013
    #1
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  3. Apr 22, 2013 #2
    CatPowerC15

    CatPowerC15 Medium Load Member

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    Feb 18, 2010
    Siler City, NC
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    Is the gauge electric or mechanical? I've found it's common for the KW mech temp gauges to fluctuate like that.

    The small hose from the t-stat housing to the radiator tank is the vent for purging air. Make sure it's not blocked.
     
    CatPowerC15, Apr 22, 2013
    CatPowerC15, Apr 22, 2013
    #2
  4. Apr 22, 2013 #3
    CatPowerC15

    CatPowerC15 Medium Load Member

    347
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    Feb 18, 2010
    Siler City, NC
    0
    On the other hand, I had a customer with a fleet of C-15's that fluctuated like that every time a head gasket popped. Hope that's not your problem.
     
    CatPowerC15, Apr 22, 2013
    CatPowerC15, Apr 22, 2013
    #3
  5. Apr 22, 2013 #4
    Karicz

    Karicz Bobtail Member

    23
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    Jun 26, 2010
    Chicago
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    Before I change thermostat its working. Hold temperature obout 185. Its hapen after i change thermostat. First time I think its bad set of termostat. I buy new one and change agai but same result.
     
    Karicz, Apr 22, 2013
    Karicz, Apr 22, 2013
    #4
  7. Apr 22, 2013 #5
    Karicz

    Karicz Bobtail Member

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    Jun 26, 2010
    Chicago
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    Im sure the housing is clear
     
    Karicz, Apr 22, 2013
    Karicz, Apr 22, 2013
    #5
  8. Apr 23, 2013 #6
    CatPowerC15

    CatPowerC15 Medium Load Member

    347
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    Feb 18, 2010
    Siler City, NC
    0
    02 has 2 tstats, does yours? I assume you changed the seals in the base of the housing?
     
    CatPowerC15, Apr 23, 2013
    CatPowerC15, Apr 23, 2013
    #6
  9. Apr 23, 2013 #7
    Karicz

    Karicz Bobtail Member

    23
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    Jun 26, 2010
    Chicago
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    I change 2 times 2 thermostat 2 gasket 2 O rings. And yes I hve 2 therm
     
    Karicz, Apr 23, 2013
    Karicz, Apr 23, 2013
    #7
  10. Apr 23, 2013 #8
    Karicz

    Karicz Bobtail Member

    23
    0
    Jun 26, 2010
    Chicago
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    Im make order head gasket leaking kit from amazon and I will check it at mondey
     
    Karicz, Apr 23, 2013
    Karicz, Apr 23, 2013
    #8
  11. Apr 23, 2013 #9
    CatPowerC15

    CatPowerC15 Medium Load Member

    347
    91
    Feb 18, 2010
    Siler City, NC
    0
    Lets back up....why did you change them originally?
     
    CatPowerC15, Apr 23, 2013
    CatPowerC15, Apr 23, 2013
    #9
    cetanediesel Thanks this.
  12. Apr 24, 2013 #10
    Karicz

    Karicz Bobtail Member

    23
    0
    Jun 26, 2010
    Chicago
    0
    I have summer set of thermostat 185 and winter set 195
     
    Karicz, Apr 24, 2013
    Karicz, Apr 24, 2013
    #10
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