Review on 🔍 ACDelco GM Original Equipment 10-5057 Engine Cooling System Tracer Dye - 1 Fluid Ounce by Benjamin Glasper

I was having trouble finding a coolant leak on my BMW 128i. I already have a black light flashlight. I put the whole bottle in and bright green liquid lit up in my coolant surge tank. I used the car during the day and went there with my flashlight. It was evident that coolant was leaking from a crack in the thermostat. I have replaced the thermostat and coolant pump which requires draining the coolant. Even after that and after topping up, the coolant appears light green. Blue BMW coolant. I don't think it will hurt but if I had to do it again I wouldn't use the whole bottle. I think in the future I can easily find all the leaks in the system!