Lubrication Description; Operation; Diagnosis And Testing Diagnosis And Testing - Engine Oil Leak Inspection - Dodge Intrepid Service Manual

9 - 148 ENGINE 3.5L
LUBRICATION
DESCRIPTION
System is a full-flow filtration, pressure feed type.
The oil pump body is mounted to the engine block.
The pump inner rotor is driven by the crankshaft. A
windage tray, increases power by minimizing oil
windage at high engine RPM. For increased oil cool-
ing, an oil-to-coolant oil cooler is used. This cooler is
mounted inside the radiator tank.

OPERATION

Engine oil stored in the oil pan is drawn in and
discharged by a gerotor type oil pump. The oil pump
is directly coupled to the crankshaft. Oil pressure is
regulated by a relief valve. The oil is fed through an
oil filter and to the crankshaft journals from the oil
gallery in the cylinder block. This gallery also feeds
oil under pressure to the cylinder heads. Oil flows
1 - CRANKSHAFT
2 - OUTER ROTOR
3 - INNER ROTOR
4 - RELIEF VALVE
5 - OIL PAN
6 - OIL SCREEN
7 - OIL PUMP CASE
8 - OIL FLOWS TO ONLY ONE PEDESTAL ON EACH HEAD -
SECOND FROM REAR ON RIGHT HEAD - SECOND FROM FRONT
ON LEFT HEAD
through each cylinder heads oil passage to the rocker
shafts. Oil then feeds the camshaft journals, rocker
arms, and hydraulic lash adjusters (Fig. 100).
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - ENGINE OIL LEAK
INSPECTION
engine, particularly at the area of the suspected leak.
If an oil leak source is not readily identifiable, the
following steps should be followed:
time because some solvents may cause rubber to
swell, temporarily stopping the leak.
manufacturer). Start the engine and let idle for
approximately 15 minutes. Check the oil dipstick to
Fig. 100 OIL LUBRICATION SYSTEM
9 - PEDESTAL DRILLED PASSAGE
10 - EXHAUST ROCKER SHAFT
11 - SHAFT/PEDESTAL DOWEL PASSAGE
12 - CAMSHAFT BEARING BORE
13 - CYLINDER BLOCK OIL GALLERY
14 - CYLINDER HEAD GASKET
15 - HEAD BOLT HOLE
16 - INTAKE ROCKER SHAFT
Begin with a thorough visual inspection of the
(1) Do not clean or degrease the engine at this
(2) Add an oil soluble dye (use as recommended by
LH