Lisle detectors are easy to use--simply connect the hose to any vehicle vacuum line or use the included red adapter with your hand vacuum pump, place the tapered end into the radiator opening, and start your engine. The vehicle vacuum or the vacuum pump draws vapors through the indicating fluid and changes yellow when exposed to combustion gases from the radiator. Bad head gaskets, slipped cylinder sleeves, cracked blocks, and cracked or warped heads can cause combustion leaks--check them out with the Lisle combustion leak detector.
Tip: Do you have a 4.0 or 4.6 liter Range Rover or Discovery I or Series II that is overheating? If so, it could be a slipped engine cylinder sleeve that is the culprit. This leak detector will help you identify the cause.
Features:
Quickly pinpoints combustion leaks
Checks for combustion leaks caused by bad head gaskets, cracked blocks, and cracked or warped heads
Indicating fluid changes color from blue to yellow when exposed to combustion gases in the cooling system and radiator
Connect the hose to any vacuum source, then place the tapered end of the tool into the radiator opening after draining off some coolant. With the engine running, the vehicle`s vacuum draws vapors through the indicating fluid for testing
Takes the guesswork out of major engine and cooling problem diagnosis