Lubrication Description

The oil distribution in the L81 engine is as follows: Suction from the crankcase via the oil intake pipe to the oil pump Oil pump to the engine oil cooler Engine oil cooler to the oil filter Oil filter to the following:
^ Main bearings 2,3 and 4
^ Oil pressure regulating valve and the number 1 main bearing
^ Cylinder heads, camshafts and lifters
^ Oil ventilation nozzles in the cylinder heads
^ Oil return galleys
^ Crankcase In the event that there is a restriction in the oil cooler lines, the oil pump will bypass the cooler to provide adequate lubrication.