This is a comprehensive, high quality cooling system pressure testing kit complete with a range of adaptor caps allowing for use on a wide range of vehicles. Supplied with a thermometer to aid diagnostics and ensure the system is cool before removing the cap. Simple to use, this kit locates system leaks from the header, expansion tanks and fittings, the head gasket, radiator core, heater matrix, water pump, hoses, pipes and much more, ensuring you have every inch of the vehicle's cooling system covered.