Can you run UV dye in the coolant all the time?

Discussion in 'KJ General Discussion' started by GitEmSteveDave, Feb 16, 2020.

  1. GitEmSteveDave

    GitEmSteveDave Full Access Member

    Messages:
    321
    Likes Received:
    72
    Joined:
    Feb 23, 2018
    Location:
    Howell
    I'm just wondering if it's safe to add some dye and when I pop the hood at night every once in awhile check to see if anything lights up, or if it should only be used when you are chasing a leak.
     
  2. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

    Messages:
    6,797
    Likes Received:
    274
    Joined:
    Oct 24, 2008
    Location:
    B.C. Canada
    Unless you notice the recovery tank a bit low (a sign of a leak) No need to add a dye.
    Do you have a leak?
     
  3. uss2defiant

    uss2defiant Full Access Member

    Messages:
    3,361
    Likes Received:
    42
    Joined:
    Jun 25, 2014
    Location:
    Tucson, Arizona
    dried coolant is also kinda fluorescent as well so you don't really need to add dye into it.
     
  4. GitEmSteveDave

    GitEmSteveDave Full Access Member

    Messages:
    321
    Likes Received:
    72
    Joined:
    Feb 23, 2018
    Location:
    Howell
    It isn't, sadly, which is why I asked. I have a pocket UV light I always carry on me and I use it when I pop my hood, but even when I had the water pump leak, it was near impossible to see when it dried.
     
  5. uss2defiant

    uss2defiant Full Access Member

    Messages:
    3,361
    Likes Received:
    42
    Joined:
    Jun 25, 2014
    Location:
    Tucson, Arizona
    really? i have the opposite experience.
    I personally would try pressurizing the system before I added dye.
     
  6. GitEmSteveDave

    GitEmSteveDave Full Access Member

    Messages:
    321
    Likes Received:
    72
    Joined:
    Feb 23, 2018
    Location:
    Howell
    I'm gonna walk that comment back a little because I realized that I was basing it on whatever coolant the shop that replaced the engine used. I just watched the Jeep Dealer put HOAT in, so maybe it will be more vibrant under my pocket blacklight.