Engine Service

Quickly Pinpoints Combustion Leaks. Checks for combustion leaks caused by bad head gaskets, cracked blocks, and cracked or warped heads. Fluid changes from blue to yellow when exposed to combustion gases from the radiator. Connect the hose to any vehicle vacuum line. Or, on tools made after June 2002, use the adapter with no cross hole with a hand vacuum pump. Place tapered end of tool into radiator opening. With the engine running, the vehicle vacuum or the vacuum pump draws vapors through the indicating fluid for testing. 75630 Replacement Fluid - 16 oz. 75730 Indicating Fluid Diesel - 16 oz. 20350 Hose tip *Fluid can be reused as long as it isn't contaminated,but needs to set out in the air to change back to regular color. *Was not tested for propane-can not say for sure if it will work *The fluids will not detect hydrcarbon gasses in the radiator-the fluids test for CO2 in cooling system. *This part number now has two silver adapters instead of one red and one silver. The one with no cross holes replaces the red one