For 1990-2009 cars

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.