Engine block combustion leak detector (for use on gasoline only) design to be used as a simple and quick way test the system for combustion leaks. This kit offers the operartor an alternetive way of testing the engine block and cylinder heads for leaks into the coolant system causing loss of power and eventual failure without expensive diagnostic fees. Kit includes heavy duty carry case with usage photos and detailed instructions. Product Features:Designed to locate combstion leaks in the engine block and cylinder headsUniversal design can diagnose leak in almost any make or modelEliminates the need for expensive in shop testingIncludes heavy duty blow molded caseKit includes usage instruction with photos