26-06-15, 04:04 PM
The 1/4 or 1/2 turn only applies to new plugs when the crush washer has to be compressed. It you try 1/2 turn the next time you risk stripping the thread in the cylinder head.
Torque wrench or calibrated hands that know when to stop before something breaks are the tools to use
Torque wrench or calibrated hands that know when to stop before something breaks are the tools to use