11 41 115 Removing and installing/replacing hydraulic valve (N52K): Notes

No  steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminum screws/bolts exclusively.

Aluminum screws/bolts must be replaced each time they are released. 

Aluminum screws/bolts are permitted with and without

color coding (blue).

For reliable identification:

Aluminum screws/bolts are not magnetic. 

Jointing torque and angle of rotation must be observed without fail (risk of damage).