I've decided that a leak finder dye for my coolant system might be the best /fastest way to find this slow leak. I was surprised to see some brands warn: Not To Be Used with Dexcool.

I suppose nothing should surprise me, but I would have thought - hey it's just a simple UV dye, how could there be Compatibility issues. . .

Well, given that, I better check since this is my first time to use it (my pressure tester always solved the mystery before).

Any warnings or heads ups I should watch out for using any brand? Can I assume "universal " brands are ok to use?

BTW, does this dye last long? I figure someday years from now I may need to do this again. Do the old dye markers throw you off the trail next round?

Thanks, I won't buy anything til I see what you think.

John

 

Are you saying that pumping up the system with a pressure tester kit has not revealed a leak?

 

I understand that the "universal" UV dyes can gel the Dexcool coolant which would be a nightmare. I was not willing to take the chance and obtained a small bottle of the AC Delco dye from a local GM dealer for around $7.00. Call first, not all dealers carry it in stock. The UV characteristics wear off in a short time. I used the UV light about a month later and the coolant did not react to the UV light source.

 

Yes Jon.

Thanks Mark.

John