Tightening Torque During Installation
CORRECT SPARK PLUG TIGHTENING TORQUE DURING INSTALLATION
It is necessary to observe thoroughly the specified tightening torque for installation of the spark plug in the engine.
Because of downsizing the specified tightening torque is lower and lower.
It is a MUST to use a torque wrench and, only if necessary, it is possible to use the alternative solution according to the picture on the packaging.