GM Original Equipment 10-5057 (12378563) Engine Cooling System Tracer Dye - 1 oz

Shows leaks perfectly. Shows bright green with UV light. I suggest using half of what's recommend.

It worked great. Should my clearly where my leak was.

Wow this stuff is bright! You can easily find leaks with this dye. It's very easy to use, just dump in your radiator, run the car, and watch for the cartoon nuclear colored fluid. Good quality and functions just like you'd expect.

It'll definitely tell you where your leak is. And it'll get everywhere when you go to fix the problem. Lol

This stuff is strong! Had a very slow leak for years, mounted to basically vapor, never leaked enough to get on the floor, but the smell was annoying, and I did have to top off the coolant every few months. This Audi has a very complicated cooling system, it even splits into two parts to send coolant separately to the supercharger. After putting the bottle in and running the car, I was able to find the leak in seconds. That said, this stuff does not flush out of the system. You’re going to have die in your coolant pretty much forever unless you completely vacuum flushed the entire system. In my case, I drained out What I could from the radiator and the hoses while I was doing the repair and although my OEM fluid is pink, everything was bright fluorescent, yellow green from the dye, as it should be. But even after flushing as much as I could, it still was fluorescent green, with about 80% new purple OEM fluid it’s still pretty much green, lol not a big deal. And by the way, I dropped about a gallon of coolant with the dye in it on my concrete driveway and it rinsed right off no problem.

It works, I put it in the system after replacing my thermostat housing, numerous hoses and lines, and radiator. I didn’t have any coolant leaks, I found that a trans line wasn’t fully seated so I had a very small trans fluid leak. The dye residue on reservoir cap was very bright under light. *this will change your coolant from orange to a bright yellowish color*. I haven’t seen any negative affects from adding it to my coolant, but do wonder if it is also compatible with trans fluid as I would like to put it in there as well.

Works great, really lights the leak up

This dye worked very well. I did use a black light and yellow lens glasses, but i think that if you did it at night everything would be much more visible. I did it when the sun was high in the sky, and although less obvious, I was able to find two leaks that were easy to fix.

Es un tinte muy práctico