General description The Laser Tools Diesel Compression Test Adaptor is specifically designed to work with the Laser 4510 diesel compression tester kit and the Laser 5140 cylinder leakage tester kits. This adaptor replaces the cylinder glow plug, enabling connection to compression and leakage test equipment for various diesel engines. Technical specifications Thread size: M8 x 1mm Total length: 147mm Thread-to-seal length: 76mm Compatibility and accessories Compatible with Chrysler 3.0L CRD and Jeep 3.0L CRD Compatible with Mercedes Benz A Class, B Class, C Class, CLA, CLK, CLS, E Class, GL/M/S Class, and Sprinter 2.1 CDI Compatible with Smart Forfour and Mitsubishi Colt Mercedes Benz Engine codes: 1.5L (OM639), 1.8, 2.2L (OM651.924,925), 2.0L (OM640), 3.0L (OM642), and 4.0L (OM629) Glow plug applications: NGK CZ303, Y8002AS, YE13; Mercedes Benz OEM 001 159 5701 and 001 159 6601