Lubrication Description (LDE, LED, LFJ, LXV, 2H0, LUW,
LFH)
Oil is applied under pressure to the crankshaft (8), connecting
rods (5), camshaft adjuster (1), camshaft bearing surfaces (3) and
valve tappets (4). All other moving parts are lubricated by gravity
flow or splash. Oil enters the rotor type oil pump (10) through a
fixed inlet screen (9). The oil pump is driven by the crankshaft.
The oil pump body is within the engine front cover (11). The
pressurized oil from the pump passes through the oil cooling system
and the oil filter (6). The oil filter is integrated with the oil
cooling system housing (7) that is connected to the front of the
engine block. The oil filter is a disposable cartridge type. A
by-pass valve in the filter cap allows continuous oil flow in case
the oil filter should become restricted. The connecting rod
bearings are oiled by constant oil flow passages through the
crankshaft connecting the main journals to the rod journals. A
groove around each upper main bearing furnishes oil to the drilled
crankshaft passages. The pressurized oil passes through the
cylinder head restrictor orifice into the cylinder head and then
into each camshaft feed gallery. An engine oil pressure switch or
sensor is installed at the end. Oil returns to the oil pan through
passages cast into the cylinder head. The crankcase ventilation
system does not contain to the lubrication system, but to the oil
circuit. It is used to consume crankcase vapours in the combustion
process instead of venting them to atmosphere. Fresh air from the
intake system is supplied to the crankcase, mixed with blow by
gases and then passed through a calibrated orifice of the crankcase
ventilation tube (2) into the intake manifold.
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