Cylinder Block Assembly: Specifications

Type 8-cylinder, four-stroke Otto engine, 90° V-engine
Crankcase Horizontally divided light alloy cylinder block/crankcase without cylinder sleeves
Crankshaft Forged steel
Crankshaft bearings 5 plain bearings, dia. 64 mm
Connecting rods Forged and cracked, l = 155 mm
Con-rod bearings Plain bearings, dia. 54 mm
Pistons Light alloy, forged
Piston pins Floating
Piston rings 2 compression rings, 1 oil scraper ring
Cylinders Aluminium/silicon running surface, mechanically exposed

Belt pulley (vibration balancer) on crankshaft M16 x 1.5 x 77
Initial tightening: 20 Nm (15 ft-lb.)
Initial tightening: 50 Nm (37 ft-lb.)
Initial tightening: 250 Nm (185 ft-lb.)
Then 90° (always replace screw)

Connecting rod cap on connecting rod M9 x 56
Tightening Torques 8 Nm (6 ftlb)
Tightening Torques 40 Nm (30 ftlb.)
then 90° (always replace screws with new ones!)

Crankshaft Bearing Caps





Place bottom section of crankcase into position. When doing so, make sure that the sealing bead is not destroyed.

Note: Unscrew the centering pins again while securing the lower part of the crankcase.

The figures below indicate the tightening sequence. The screws are tightened in four steps. It is essential that the tightening sequence is observed here.

The screws must be tightened within five minutes.
Initial tightening: 30 ft-lb.
Initial tightening: 16 ft-lb.
Final tightening: 56°
Final tightening: 60°

Inner bearing seat





Outer bearing seat





Then screw on the outer cross bolt connection (M8 x 70) in the sequence shown Tightening torque: 17 ft-lb.








Tighten the four hexagon socket bolts on the clutch side (M8 x 35) Tightening torque: 17 ft-lb.