Lubrication System (8-Cylinder); Oil Filter (8-Cylinder); Oil Pump; Oil Pressure Relief Valve - Jeep 1979 CJ-5 Technical & Service Manual

ENGINES 113-53
(6) Right side:
(a) Connect alternator support bracket to cylin-
der head.
(b) Install air conditioning compressor mount-
ing bracket, if removed, and battery negative cable to
cylinder head.
(7) Adjust all drive belts to specified tension. Refer
to Chapter 1C—Cooling.
(8) Install exhaust manifold and tighten retaining
screws to 25 foot-pounds (34 N®m) torque.
(9) Install intake manifold. Tighten manifold re-
taining screws to 43 foot-pounds (58 N®m) torque.
(10) Install all disconnected lines, hoses, linkage and
wires.
(11) Install rocker arm assemblies and push rods in
same order as removed. Loosely install capscrews to
bridged pivots. At each bridge, tighten capscrews alter-
nately one turn at a time to avoid damaging bridge.
Tighten capscrews to 19 foot-pounds (26 N®m) torque.
(12) Reseal and install cylinder head cover. Tighten
retaining screws to 50 inch-pounds (6 N*m) torque.
(13) Install spark plugs and connect ignition wires.
(14) Pill cooling system to specified level
LUBRICATION SYSTEM
Oil is drawn from the sump of the oil pan through a
tube and screen assembly to a horizontal oil gallery
located at the lower right side of the engine block (fig.
1B-82). A passage in the timing case cover channels oil
into the oil pump. Pressure is developed when oil is
driven between the gears and pump body.
The oil is forced from the pump through a passage in
the oil pump cover to the oil filter (fig. 1B-83).
The oil passes through the filtering elements and on to
an outlet passage in the oil pump cover. From the oil
pump cover passage, the oil enters an adjoining passage
in the timing case cover and is channeled into a gallery
which extends up the left front of the cylinder block.
This gallery channels oil directly to the right main oil
gallery which intersects with a short passage that chan-
nels oil to the left main oil gallery.
The left and right main oil galleries extend the length
of the cylinder block. The left oil gallery channels oil to
each hydraulic tappet on the left bank. The right oil
gallery channels oil to each hydraulic tappet on the right
bank. In addition, passages extend down from the right
oil gallery to the five camshaft bearings and on to the
five upper main bearing inserts. The crankshaft is
drilled to allow oil to flow from each main journal to
adjacent connecting rod journals. A squirt hole in each
connecting rod bearing cap distributes oil to the cylinder
walls, pistons and piston pins as the crankshaft rotates.
A small passage within the front camshaft bearing
journal channels oil through the camshaft sprocket to
the timing case cover area where the case and sprockets
throw off oil to lubricate the distributor gears and fuel
pump eccentric (see insert, fig. 1B-82). This oil returns to
the oil pan by passing under the front main bearing cap.
Oil for the rocker arm assemblies is metered through
the hydraulic valve tappets and routed through hollow
push rods to a hole in the push rod end of the corre-
sponding rocker arm. This oil lubricates the valve train,
then returns to the oil pan through channels at both
ends of the cylinder head.
Oil
A full flow oil filter mounted on the oil pump at the
lower right-hand side of the engine is accessible from
below the chassis.
A bypass valve in the filter mounting base provides a
safety factor in the event the filter becomes inoperative
as a result of dirt or sludge accumulation (fig. 1B-84). Oil
Filter Remover Tool J-22700 will facilitate removal.
Before installation, apply a thin film of oil to the filter
gasket. Do not u s e grease. Install filter until gasket
contacts the seat of the oil pump cover. Tighten by hand
only, following instructions on replacement filter. If in-
structions are not printed on filter, tighten filter until
gasket contacts seat and then tighten an additional 3/4
of a turn. 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 (fig. 1B-84). The pump is incorporated
in the timing case cover. A cavity in the cover forms the
body of the pump. A pressure relief valve regulates
maximum pressure.
Oil pump removal or replacement will not affect dis-
tributor timing. The distributor drive gear remains in
mesh with the camshaft gear.
Oil Pressure Relief Valve
The oil pressure relief valve is not adjustable. A set-
ting of 75 pounds (517 kPa) maximum pressure is built
into the tension of the spring.
In the relief position, the valve permits oil to bypass
through a passage in the pump cover to the inlet side of
the pump (fig. 1B-84).
Removal
(1) Remove retaining screws and separate oil pump
cover, gasket and oil filter as an assembly from pump
body (timing case cover).
(2) Remove drive gear assembly and idler gear by
sliding them out of body.
(3) Remove oil pressure relief valve from pump
cover for cleaning by removing retaining cap and spring.
Clean cover thoroughly. Check operation of relief valve
by inserting poppet valve and checking to see that it
slides back and forth freely. If not, replace pump cover
and poppet valve.