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C15 accert coolant diverter valve problem

Discussion in 'Trucks [ Eighteen Wheelers ]' started by E model Cat man, Jul 5, 2016.

Page 1 of 2
  1. Jul 5, 2016 #1
    E model Cat man

    E model Cat man Light Load Member

    79
    72
    Jun 10, 2014
    Northern Maine
    0
    On a C15 accert nxs is the pre cooler diverter valve a normally open or normally closed solenoid/valve and could it stick open? Thanks.
     
    E model Cat man, Jul 5, 2016
    E model Cat man, Jul 5, 2016
    #1
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  3. Jul 5, 2016 #2
    tony97905

    tony97905 Road Train Member

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    Feb 28, 2015
    Land of Ahhhhhs
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    Not sure if NO or NC but it could stick. What problem are you experiencing?
     
    tony97905, Jul 5, 2016
    tony97905, Jul 5, 2016
    #2
  4. Jul 6, 2016 #3
    lilillill

    lilillill Sarcasm... it's not just for breakfast

    5,642
    13,472
    Nov 7, 2007
    Possum Booger, Alabama
    0
    The valve is normally closed but they usually don't stick. Most of the time the diaphragm tears and lets coolant flow all the time.

    A rebuild kit is around $120 last time I bought one from Cat.
     
    lilillill, Jul 6, 2016
    lilillill, Jul 6, 2016
    #3
    E model Cat man Thanks this.
  5. Jul 6, 2016 #4
    E model Cat man

    E model Cat man Light Load Member

    79
    72
    Jun 10, 2014
    Northern Maine
    0
    High water temps and put a fuel temp wire on it and it would go up to 230°F in a pull quite quick. Fuel temp wire made the problem much more noticable!
     
    E model Cat man, Jul 6, 2016
    E model Cat man, Jul 6, 2016
    #4
  7. Jul 6, 2016 #5
    lilillill

    lilillill Sarcasm... it's not just for breakfast

    5,642
    13,472
    Nov 7, 2007
    Possum Booger, Alabama
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    Probably not the cause of your heating. Remove the condenser, CAC and blow out the radiator with compressed air.

    Thermostats ok? Fan hub not slipping?

    Fan should come on at 215 degrees.
     
    lilillill, Jul 6, 2016
    lilillill, Jul 6, 2016
    #5
    E model Cat man Thanks this.
  8. Jul 7, 2016 #6
    E model Cat man

    E model Cat man Light Load Member

    79
    72
    Jun 10, 2014
    Northern Maine
    0
    Radiator, air to air, and condenser have all been cleaned. Everything fan related is fucnioning propely. It burns alot of fuel too, like 3.5mpg is all it gets, makes 55psi of boost but is sick as a dog!
     
    E model Cat man, Jul 7, 2016
    E model Cat man, Jul 7, 2016
    #6
  9. Jul 7, 2016 #7
    lilillill

    lilillill Sarcasm... it's not just for breakfast

    5,642
    13,472
    Nov 7, 2007
    Possum Booger, Alabama
    0
    How long have you had this truck? Did someone get into the ECM?
     
    lilillill, Jul 7, 2016
    lilillill, Jul 7, 2016
    #7
  10. Jul 8, 2016 #8
    Oscar the KW

    Oscar the KW Going Tarpless

    12,247
    28,119
    May 19, 2011
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    When was the last time the overhead was run?

    What rpm are you cruising at, what rpm are you shifting at? Lots of idle time?
     
    Oscar the KW, Jul 8, 2016
    Oscar the KW, Jul 8, 2016
    #8
    E model Cat man Thanks this.
  11. Jul 8, 2016 #9
    E model Cat man

    E model Cat man Light Load Member

    79
    72
    Jun 10, 2014
    Northern Maine
    0
    Just did it with zero improvment, idles very little, have tried driving it all different ways with best results driving it hard and splitting the 18 spd at 1500 in hard pull and upshifting at 1800. it has the heavy haul programming in it and use to work great. Had pittsburg power on it for a week and the fan never. Hardly shut off when it was loaded and only on #2 setting. Has new thermostats as well.
     
    E model Cat man, Jul 8, 2016
    E model Cat man, Jul 8, 2016
    #9
  12. Jul 8, 2016 #10
    E model Cat man

    E model Cat man Light Load Member

    79
    72
    Jun 10, 2014
    Northern Maine
    0
    Had heavy haul program installed a year ago and worked great till this spring when it was slow and sat some..thought it was just the left over winter cut fuel at first.
     
    E model Cat man, Jul 8, 2016
    E model Cat man, Jul 8, 2016
    #10
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