Ducati Diavel Service Manual: Refitting the intake manifold and coolant union

Apply prescribed threadlocker to the fitting (12), start it with seal (24) and tighten it to a torque of 2.5 Nm (min. 2 Nm - max. 3 Nm) (sect. 3 - 3, Frame torque settings).

Install the pipe (b) and tighten the clamp (a) to the torque of 1 nm +/- 10% (sect. 3 - 3, Engine torque settings).

Check that the mating surfaces of the cylinder head and manifold are perfectly flat and clean and install the intake manifold (25) on the cylinder head.

Lock the fixing screws (21) to the torque of 10 nm (min. 9 Nm - max. 11 Nm) (sect. 3 - 3, Engine torque settings) in a cross-pattern sequence (1-2-3-4).