Ducati Diavel Workshop Manual page 793

Crankcase assembly: external components
between 0.6 and 0.8 mm.
Check the condition of O-rings (2) and renew if necessary.
Install the oil vapour breather valve (1) in the crankcase along with O-rings (2), previously lubricated.
Tighten the screw (17) to a torque of 10 Nm (Min. 9 Nm - Max. 11 Nm) (Sect. 3 - 3, Engine torque settings).
Position the by-pass spring (7) on the nipple (6) and apply the recommended threadlocker to the end of the nipple to be
screwed in the crankcase half. Screw oil filter cartridge fitting (6) fully into the crankcase half, positioning the spring in the
seat between the two notches (A). Tighten the nipple to a torque of 42 Nm (Min. 38 Nm - Max. 46 Nm) (Sect. 3 - 3,
Engine torque settings).
Fit the seal (9) on the oil drain plug (10). Position the seal that the side with the square edge (B) is facing the chain side
crankcase half.
Clean the plug thread, apply a string of THREE BOND TB1215 along the plug thread spreading it by the entire
circumference (360°).
Screw the exhaust plug (10) with relevant washer (9), and tighten it to a torque of 20 Nm (Min. 18 Nm - Max. 22 Nm)
(Sect. 3 - 3, Engine torque settings).
Note
After tightening, remove any excess sealant.