Oil Filter And Oil Pump - Jeep 1979 CJ-5 Technical & Service Manual

ENGINES 1B-19
timing chain. Rotation of the sprocket lubricates the
crankshaft sprocket and chain. Oil drains back to the oil
pan under the No. 1 main bearing cap.
The oil supply for the rocker arms and bridged pivot
assemblies is provided by the hydraulic valve tappets.
Oil passes from the tappet through the hollow push rod
to a hole in the corresponding rocker arm. Oil from the
rocker arms lubricates the valve train components, then
passes down through the push rod guide holes in the
cylinder head past the valve tappet area, and returns to
the oil pan.
Oil Filter
A full flow oil filter, mounted on the lower right side
of the engine, is accessible through the hood opening. A
bypass valve incorporated in the filter mounting boss on
the cylinder block provides a safety factor if the filter
becomes inoperative as a result of dirt or sludge accu-
mulation (fig. 1B-30).
Tool J-22700 will facilitate removal of the oil filter.
Before installation, apply a thin film of oil to the re-
placement filter gasket. Install filter until gasket con-
V A L V E
SPRING
B Y P A S S
VALVE
tacts the seat of the adapter. Tighten by hand only,
following the instruction on the replacement filter. If
the instructions are not printed on the filter, tighten the
filter until the gasket contacts the seat and then tighten
an additional 3/4 of a turn.
CAUTION: Use the short, 4.25-inch (107.95 mm) filter
on six-cylinder CJ models. If the long, 544-inch (188.18
mm) filter is used, it may contact the engine support
bracket or frame rail. This can puncture the filter re-
sulting in a loss of oil and possible engine damage.
Operate engine at fast idle and check for leaks.
Oil Pump
The positive-displacement gear-type oil pump is
driven by the distributor shaft, which is driven by a gear
on the camshaft. Crankcase oil is drawn into the pump
through an inlet tube and screen assembly which is
pressed into the pump body (fig. 1B-30). The pump in-
corporates a non-adjustable pressure relief valve to
regulate maximum pressure. A setting of 75 pounds
R E T A I N E R
FILTER
SPRING
RETAINER
D R I V E GEAR
ASSEMBLY
OIL PRESSURE
RELIEF SPRING
OIL I N L E T TUBE
A N D SCREEN
ASSEMBLY
4 1 0 8 2
Fig 1B-30 Oil Filter and Oil Pump Assembly