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2012 Cascadia leaking DEF fluid from bottom of tank

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by tallmon, Dec 7, 2018.

  1. Dec 7, 2018 #1
    tallmon

    tallmon Medium Load Member

    657
    320
    Oct 22, 2014
    0
    My 2012 Cascadia is leaking DEF fluid from bottom of tank. It looks like at the bottom there is a 2" diameter cap. A couple of weeks ago I was able to get a 1/2 turn on it and it stopped leaking. Now it's leaking again. Is that some sort of drain cap?
     
    tallmon, Dec 7, 2018
    tallmon, Dec 7, 2018
    #1
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  3. Dec 7, 2018 #2
    JohnC123

    JohnC123 Light Load Member

    135
    66
    Jan 25, 2018
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    All the tanks I've seen only have 2 openings and they're at the top and upper side, I think your referring to the pump module filter cap
    DEF filter cap.
     
    JohnC123, Dec 7, 2018
    JohnC123, Dec 7, 2018
    #2
    tallmon Thanks this.
  4. Dec 13, 2022 #4
    Jooeugen

    Jooeugen Bobtail Member

    28
    3
    Mar 14, 2021
    0
    Had same issue with def pump but I got a volvo ..hope this helps you or others :
     
    Jooeugen, Dec 13, 2022
    Jooeugen, Dec 13, 2022
    #4
  5. Dec 16, 2022 #4
    wtokhi

    wtokhi Light Load Member

    251
    115
    Nov 3, 2017
    0
    I think you're def filter cap is leaking that's the only thing in that area that looks like a cap, they leak once in a while, easy replacement, part number A0001421089
     
    wtokhi, Dec 16, 2022
    wtokhi, Dec 16, 2022
    #4
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