LUBRICATION SYSTEM 19
Six cylinder engine lubrication system
(19A.03/A)
The oil pump is similar to that used on four cylinder
engines and is also driven through an idler gear
from the crankshaft gear. The inner rotor has four
lobes and the outer rotor has five lobes.
Lubricating oil from the sump passes through a
strainer and pipe to the suction side of the pump.
The oil passes from the outlet side of the pump,
through a pipe and a passage in the cylinder block
to the oil filter head. The oil then passes through a
passage in the filter head and a pipe to a plate type
oil cooler, see the off set (19A.03/A), which is an
integral part on the left of the cylinder block. On
naturally aspirated engines the oil cooler has four
plates and on turbocharged engines the cooler has
eight plates. The oil cooler is fitted with a by-pass
valve. If cold oil increases the restriction in the
cooler, the by-pass valve opens and the oil passes
directly from the inlet side to the outlet side of the
cooler. If the engine is not fitted with an oil cooler,
the oil passes from the oil pump to the relief valve.
From the oil cooler, the oil returns through a pipe to
the filter head where the oil divides to the relief
valve and to the oil filter. The oil filter can be fitted
on the left or right side of the engine. If the filter is
fitted on the right side of the engine, the oil passes
through a pipe connected between the relief valve
and the right side of the cylinder block to the oil
filter.
The lubricating oil passes from the filter to the
pressure rail which is drilled the full length of the
left side of the cylinder block. If the oil filter is on
the right side of the engine, the oil passes through
a passage drilled across the cylinder block to the
pressure rail.
From the pressure rail, lubricating oil passes to the
main bearings of the crankshaft and through
passages in the crankshaft to the big end bearings.
The pistons and the cylinder bores are lubricated by
splash and oil mist.
Lubricating oil passes from the main bearings
through passages in the cylinder block to the
journals of the camshaft. Lubricating oil passes, at a
reduced pressure, from the second journal of the
camshaft through a passage in the cylinder block
and cylinder head to the rocker shaft. The oil
passes through a passage in the rocker shaft to the
bearings of the rocker levers. The valve stems,
valve springs and the tappets are lubricated by
splash and oil mist.
The hub of the idler gear is lubricated by oil from
the pressure rail and the timing gears are splash
lubricated.
The turbocharger is lubricated by oil after the filter.
Oil is supplied from a connection on the right side
of the cylinder block through a pipe to the
turbocharger. The oil passes through the
turbocharger and returns through a pipe to the
sump.
Turbocharged engines have piston cooling jets
fitted. These jets are connected to the oil pressure
rail and spray lubricating oil inside the pistons to
keep them cool.
Perkins Phaser/1000 Series, April 1995 19A.05
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