Positive proof that a leak is present when the tester fluid changes color
Gasoline engine: tester fluid changes from blue to yellow
Diesel engine: tester fluid changes from blue to green
Works on: Gasoline and Diesel engines!
16 oz./480 ml
Gasoline Engine: Tester Fluid changes from blue to yellow. Diesel Engine: Tester Fluid changes from blue to green Works on: Gasoline and Diesel engines! 16 oz./480 ml