Piston Lubrication Jets Hook-type nozzles are connected directly into an oil gallery in the crankcase and secured by two screws. The jets provide lubrication to the cylinder walls, and to the piston underskirt for cooling the pistons and lubricating the gudgeon pins and small-end bearings. M12 7843
ENGINE - V8 DESCRIPTION AND OPERATION 12-2-9 Timing Case Covers Separate timing case covers are bolted to the two cylinder heads and the crankcase. The upper timing case covers have ports for the VCC solenoid valves and Camshaft Position (CMP) sensors. The lower cover has an integral mounting for the alternator which acts as a water jacket. A drain plug and sealing ring is fitted to the bottom of the mounting. Rubber preformed gaskets form seals between the cylinder heads and crankcase and respective timing case covers.
ENGINE - V 12-2-10 DESCRIPTION AND OPERATION Sump The two-piece aluminium die-cast sump, with an integral tunnel for the differential drive shaft, is sealed to the lower crankcase extension using a rubber metal-backed gasket. The sump is fixed to the lower crankcase extension using 25 bolts. An oil deflector plate is attached to the crankcase reinforcing shell above the sump. The sump incorporates a drain plug and a dipstick guide tube. Oil Pump The oil pump housing and cover is manufactured from cast aluminium. The gear type oil pump is driven via the crankshaft. The oil pump is located in the sump and is attached to Nos 1 and 2 main bearing caps. The rotor-type pump produces a regulated pressure of approximately 4.5 bar. A metal suction pipe obtains oil from the sump.