System Specifications
Type 8-cylinder, four-stroke Otto engine, 90° V-engineCrankcase 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, 1 = 155 mm
Con-rod bearings Plain bearings, dia. 54 mm
Pistons Light alloy casting
Piston pins Floating
Piston rings 2 compression rings, 1 oil scraper ring
Cylinders Aluminum/silicone running surface, mechanically exposed
Bore 93 mm (3.66 in)
Stroke 83 mm (3.27 in)
Cubic Capacity 4511 Cm3 (275.2 Cu.in.)
Compression ratio 11.5 :1
Max. engine power as per 80/1269/EEC 250 KW (340 HP)
Net power as per SAE J1349 340 HP
AT engine speed 6000 rpm
Max. torque as per 80/1269/EEC 420 Nm
Net torque as per SAE J1349 310 ftlb.
At engine speed 2500 - 5500 rpm
Max. output per litre 55.6 KW/L 75.6 HP/L (75.6 HP/L)
Inner bearing seat (Tightening Sequence)
Outer bearing seat (Tightening Sequence)
Crankshaft Main Bearing
Initial tightening: 40 Nm (30 ftlb.)
Initial tightening: 22 Nm (16 ftlb.)
Final tightening: 75°
Final tightening: 60°
Crankshaft bearings 5 plain bearings, dia. 64 mm
Outer cross bolt connection (Tightening Sequence)
Then screw on the outer cross bolt connection (M8 x 70) 23 Nm (17 ftlb.).
Pulley to crankshaft
Replace screw (M16 x 1.5 thread) Initial tightening 20 Nm (15 ftlb.)
Screw (M16 x 1.5 thread) Initial tightening 50 Nm (37 ftlb.)
Screw (M16 x 1.5 thread) Initial tightening 250 Nm (185 ftlb.)
M16 x 1.5 thread Torque angle - final tightening 90°
(Always replace screw!)
Connecting rod bolt
Thread M9 x 56 (replace on installation) Initial tightening 1 6 ftlb.
Thread M9 x 56 Initial tightening 2 15 ftlb.
Thread M9 x 56 Initial tightening 3 30 ftlb.
Thread M9 x 56 Torque angle (final tightening) 90°
(Always replace screws with new ones)
Con-rod bearings Plain bearings, dia. 54 mm
Connecting rods Forged and cracked, 1 = 155 mm
Crankshaft bearings 5 plain bearings, dia. 64 mm
Main Bearing Size Codes
Information:
The color codes of the crankshaft bearings and bearing shells must match!
To ensure that the bearings and bearing shells are of a matching class during installation, the bearing numbers are to be written on the backs of the bearings during removal of the main bearing shells with a waterproof felt-tipped pen, due to that fact that the ink markings wear off of the crankshaft journals as well as the main bearing shells.
New bearing shells are always to be installed when the engine is repaired.
Piston rings 2 compression rings, 1 oil scraper ring
Pistons Light alloy casting