Combustion Leak Detector
- 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
