Comprehensive Cooling System Diagnosis: Pressurizes the cooling system to detect leaks in hoses, radiators, header tanks, water pump seals, and potential head gasket or cracked head issues. Complete Kit: Includes a precision thermometer, hand pressure pump with gauge, pressure release valve, 4 popular radiator cap adapters, and 8 threaded adapters for versatile compatibility. Wide Vehicle Compatibility: Adapters fit models across major brands, including GM, Mercedes-Benz, Jeep, Honda, Toyota, Subaru, Nissan, Mazda, Volkswagen, BMW, Audi, and more. Easy to Use: Quickly identifies cooling system issues, providing reliable, accurate results to save time on repairs.