Engine Lubrication: Description and Operation

Lubrication System Flow:

- Full 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 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.