Engine 9111 · 1010 Crankcase

Engine 9111 1010 Crankcase The constructional design of the four-part crankcase with separate bearing sleeve and LOKASIL cylinder sleeves, along with the 96 mm bore was retained. To reduce pump losses in the crankcase, the lower ends of the cylinder sleeves (see arrow) were provided with arches which allow a low-loss circulation of gasses in the crankcase. This reduces the ventilation losses and consequently the power losses at higher engine speeds thereby increasing the overall power in this engine speed range. The crankshaft bearings were modified due to the displacement increase and subsequent increase of power unit loading. 1_9_02 The bearing diameter was increased from 60 to 63 mm, the lubricating-oil feed optimised by partial grooving. 1348 Crankshaft The stroke of the drop-forged crankshaft was increased from 78 mm to 82.8 mm. The crankshaft journals were also thickened to 63 mm. 1340 Connecting rods Because of the altered stroke, the forged and cracked connecting rods were shortened by 3 mm and have now a length of 142 mm (measured from respective bore centre). 1 - 4 Service Information 2002