Sealey diesel petrol compression leakage tdc kit sealey vse3156 a comprehensive kit for testing the compression and leakage on both diesel and petrol vehicles features 600psi gauge with large rubber bumper straight and right angled quick connect fittings and an extensive range of spark glow plug and injector adaptors includes tdc finder ideal for use when the engine has no crankshaft timing marks supplied in tough carry case see sealey website for complete vehicle applications seal