Full oil pressure lubrication, through a full-flow oil
filter is supplied by a gear-type oil pump. Oil is
drawn up through the oil pump screen and
passes through the pump to the oil filter. The oil
filter is a full-flow paper element unit with an
anti-drain back valve.

An oil filter bypass valve is used to ensure
adequate oil supply, in the event the filter
becomes plugged or develops excessive
pressure drop. Filtered oil flows into the main
gallery and then to the camshaft, the balance
shaft, the rear bearing, and the crankshaft
bearings. The valve lifter oil gallery supplies oil to
the valve lifters. Oil flows from the valve lifters
through the hollow valve pushrods to the valve
rocker arms.

Oil drains back to the crankcase through the oil
drain holes in the cylinder head. The camshaft
timing chain is drip fed from the front camshaft
bearing. The pistons and piston pins are
lubricated by oil splash.
2.2L Engine Oiling System Description

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