Lubrication System: Notes

ITEM	DESCRIPTION
1	Oil pump outlet tube
2	Anti-drain valve
3	Oil cooler
4	Oil filter
5	Piston cooling jets
6	Timing chain lubrication jets
7	Oil evacuation tube
8	Oil pump
9	Oil temperature and level sensor
10	Oil pick-up

The oil pump is attached to the underside of the windage tray. The input shaft of the oil pump is driven from the front of the crankshaft, by the auxiliary chain, at 0.87 engine speed.

The oil pump draws oil from the sump pan through a centrally mounted pick-up pipe. The oil is pressurized and pumped through an output tube to the cylinder block. After passing through an anti-drain valve and a plate type oil cooler, the oil is filtered by a replaceable cartridge installed on the front of the RH cylinder head.

The output from the oil filter is distributed through oil galleries in the cylinder heads and cylinder block. All moving parts are lubricated by pressure or splash oil. Pressurized oil is also provided for the VCT system, the timing chain tensioners, the piston cooling jets and the timing chain lubrication jets.

The oil returns to the oil pan under gravity. Large drain holes through the cylinder heads and cylinder block ensure the rapid return of the oil to the sump pan. System replenishment is through the oil filler cap on the LH cylinder head cover.

An oil evacuation tube is installed to allow oil to be drawn from the sump pan. The upper end of the oil evacuation tube is located under the oil filler cap.

An oil drain plug is installed in the RH side of the sump pan.