Installation tips for glow plugs
Before installing a new glow plug, first clean the threads. Then screw in the glow plug by hand until the sealing face is in contact with the cylinder head. Now it can be tightened to the correct torque. Caution: Tightening to an incorrect torque can damage the glow plug!
Special care is necessary when installing ceramic glow plugs, since improper handling can result in damage to the ceramic layer.