ENGINE OILING
ENGINE OILING SYSTEM
A full-flow oil filter and trochoid-type oil pump are used.
The oil pump delivers filtered oil to main oil gallery and crankshaft
journals. Oil passages in crankshaft feed oil to connecting rod
journals. Engine cylinder bore and piston pins are lubricated by oil
spray from oil jet located on connecting rods.
An oil passage from No. 3 crankshaft journal delivers oil to
cylinder head. Oil is fed to rocker arms by oil ports in rocker arm
shaft assemblies. An oil well on top of cylinder head provides
lubrication for camshaft. Timing chain and sprockets are lubricated
by oil spray from oil jet located on chain guide.
CRANKCASE CAPACITY
Impulse
Oil capacity is 5.28 quarts (5.0L) on 1.9L models. Oil
capacity is 3.8 quarts (3.6L) with filter and 3.4 quarts (3.2L)
without filter on 2.0L models.
P’UP & Trooper II
Oil capacity is 5.28 quarts (5.0L) on 1.9L models. Capacity
is 4.0 quarts (3.8L) without filter and 4.4 quarts (4.2L) with filter
on 2.3L models.
OIL PRESSURE
Oil pressure should be approximately 57 psi (4 kg/cm
) at
2800 RPM.
OIL PRESSURE RELIEF VALVE
Oil pressure relief valve opens at approximately 57-71 psi
(4-5 kg/cm
).
Fig. 10: Exploded View of Oil Pump Assembly on 1.9L Models
Courtesy of Isuzu Motor Co.
OIL PUMP
