1. Apply a drop of oil to the bearing surface of the bolt heads.
2. Place the cylinder head on the cylinder block and hand-tighten a few of the cylinder head bolts to arrange alignment.
3. Fit the remaining bolts (M18 and M12).
4. Tighten the cylinder head bolts to the specified torque and in the specified sequence.
– Lubricate the valve stem seals well with clean engine oil.
– Reuse attachment bolts only, when a new nut can be screwed by hand, over the complete clean bolt thread.