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LUBRICATION SYSTEM
General Description
Figure 10-1 Engine Lubrication Diagram
131-001
Engine operation is the same as any typical internal
combustion gasoline engine. The pressurized
lubrication oil is supplied by a gear pump mounted on
the rear main bearing cap. The distributor, driven by a
helical gear on the camshaft, also drives the gear oil
pump. A spring type pressure regulating valve controls
the system oil pressure.
Oil flows from the pump to a full flow oil filter and to the
main oil gallery. If oil filter becomes restricted, the filter
by-pass valve opens, allowing oil to continue to flow to
gallery for engine lubrication. The main oil gallery is
drilled the length of the block above the camshaft.
The main gallery supplies pressure oil to the camshaft
bearings and main bearings. Oil flows to the
connecting rod bearings through holes drilled in the
crankshaft. From the front camshaft bearing, oil flows
to the timing gear oil nozzle for gear lubrica-tion.
Pressurized oil is also routed to the lifters.
The hydraulic valve lifters supply oil through hollow
pushrods to the rocker arms. Oil from the camshaft,
crankshaft and timing cover returns to the oil pan to
repeat the cycle.
For recommeded engine oil, see Maintenance
Section.
LP Engine G430 (3.0L)
Lubrication System
