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

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GitEmSteveDave

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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.
 

LibertyTC

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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?
 

GitEmSteveDave

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dried coolant is also kinda fluorescent as well so you don't really need to add dye into it.

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.
 

uss2defiant

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really? i have the opposite experience.
I personally would try pressurizing the system before I added dye.
 

GitEmSteveDave

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really? i have the opposite experience.
I personally would try pressurizing the system before I added dye.

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.
 

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