For detecting a variety of common petrol and Diesel engine faults including: worn piston rings, worn valves, cracks in cylinder walls and blown head gaskets. Included adapters: - M12x1.25 (Diesel glow plug) - M10x1.0 (Diesel glow plug) - M24x2 (Diesel injector) - M12x1.25 with 7mm hole (VW Diesel) - M14x1.25, M18x1.5 (petrol spark plug)