Intake Manifold (8-Cylinder) - Jeep 1979 CJ-5 Technical & Service Manual

1B-50 ENGINES
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Installation
• (1) Assemble timing chain, crankshaft sprocket and
camshaft sprocket with timing marks aligned (fig. 1B-
80).
(2) Install chain and sprocket assembly to crank-
shaft and camshaft.
(3) Install fuel pump eccentric and distributor drive
gear.
(4) Install camshaft sprocket, washer and retaining
screw. Tighten screw to 30 foot-pounds (41 N®m) torque.
NOTE: Install the fuel pump eccentric with the
stamped word REAR facing the camshaft sprocket
(5) To verify correct installation of timing chain:
(a) Rotate crankshaft until timing mark on
camshaft sprocket is on horizontal line a t 3 o'clock
position.
(b) Beginning with pin directly adjacent to cam-
shaft sprocket timing mark, count number of pins down-
ward to timing mark on crankshaft sprocket.
(c) There must be 20 pins between these two
points. The crankshaft sprocket timing m a r k must be
between pins 20 and 21 (fig. 1B-80).
(6) Install crankshaft oil slinger.
(7) Remove original oil seal from timing case cover.
(8) Install replacement oil seal in timing case cover.
(9) Install timing case cover using replacement gas-
ket. Tighten retaining screws to 25 foot-pounds (34 N # m )
torque.
11TIKE
AND
E11AUST MANIFDLDS
Intake lanlfell
The cast iron intake manifold is designed to enclose
and seal the tappet area between the cylinder heads. A
one-piece metal gasket, used to seal the intake manifold
to the cylinder heads and block, also serves as an oil
splash baffle.
The intake manifold contains coolant passages, a
crankcase ventilator passage and an exhaust crossover
passage. Passages are also incorporated within the in-
take manifold for the Exhaust Gas Recirculation (EGR)
system.
Induction system passages distribute a uniform fuel
and air mixture to the combustion chamber of each
cylinder. The left side of the carburetor supplies fuel-air
mixture through passages in the intake manifold to
numbers 1, 7, 4 and 6 cylinder intake ports. The right
side supplies 3, 5, 2, and 8.
Removal
(1) Drain coolant from radiator and cylinder block.
(2) Remove air cleaner assembly.
(3) Disconnect ignition wires.
(4) Remove ignition wire plastic separators from
cylinder head cover brackets.
Fig. 1B-80
Correct Timing Chain Installation
(5) Disconnect radiator upper hose and bypass hose
from intake manifold.
(6) Disconnect and move aside wire from temper-
ature gauge sending unit.
(7) Disconnect ignition coil bracket and move coil
and bracket assembly aside.
(8) Remove TCS solenoid vacuum valve and sole-
noid control switch, if equipped, from right side cylinder
head cover.
(9) Disconnect heater hose from rear of manifold.
(10) Code and disconnect all hoses, lines and wires
frorti carburetor.
(11) Disconnect accelerator linkage from carburetor
and intake manifold.
(12) Disconnect air delivery hoses a t air injection
manifold.
(13) Diseonnect diverter valve from air pump output
hose and move valve and delivery hoses aside. '
(14) Remove carburetor.
(15) Remove intake manifold, metal gasket and end
seals.
(16) Clean mating surfaces of engine block, cylinder
head and intake manifold.