Ford COUGAR 1968 Shop Manual page 384

GROUP 8
-
Engine
3. Pry the outer disc loose and
then pull off the centrifugal filter
fan as shown in Fig. 25. Care should
be taken to prevent fragments from
entering the air intake hole if the
fan breaks when removing.
4. Install the new filter fan by
drawing it into position, using the
pulley and bolts as an installer. Draw
the fan evenly by alternately tighten-
ing the bolts, making certain that the
outer edge of the fan slips.into the
housing.
A slight amount of interference with
the housing bore is normal, and some
initial noise during run-in may be ex-
pected.
THERMACTOR AIR SUPPLY
PUMP
REMOVAL
1. Disconnect the air inlet and
outlet hoses at the air pump.
2.
Loosen the adjusting arm to air
pump and air pump to mounting
bracket bolts t o relieve the drive belt
tension.
3. Disengage the drive belt. Re-
move the mounting .bolts and air
Pump.
FIG.
25-Thermactor Air Pump
Centrifugal Filter Fan Removal
1 NSTALLATION
1. Position the air pump on the
mounting bracket and install the
mounting bolt and nut.
2. Place the drive belt in the pul-
leys and attach the adjusting arm to
the air pump. Adjust the drive belt
tension to .specifications and tighten
the adjusting arm and mounting
bolts.
3. Connect the air inlet and out-
let hoses to the air pump.
AIR PUMP RELIEF VALVE
REPLACEMENT
Do not disassemble the air pump
to replace the relief valve, but remove
it from the engine.
1. Position Tool T66L-9A486-D on
the air pump and remove the relief
valve with the aid of a slide hammer
(T59L- 100-B).
2. Position the relief valve in the
pump housing and hold Tool T66L-
9A486-B on the relief valve. Use a ham-
mer to tap the tool lightly until the
relief valve is seated.
RELIEF VALVE PRESSURE
SETTING PLUG REPLACEMENT
1. Compress the three locking tabs
inward (together) and remove the
plastic pressure setting plug.
2. Before installing the new plug,
be sure that the plug is the correct
one. The correct plug for this engine
shouldbe color coded blue.
3. Position the plug in the relief
valve hole, and push the plug in until
it snaps. into place.
VALVE ROCKER ARM SHAFT
ASSEMBLY
REMOVAL
1. Remove the air cleaner.
2. On Thermactor engines, discon-
nect the air hoses as necessary for ac-
cessibility and position them out of
the way.
3. Disconnect the spark plug wires
at the spark plugs. Remove the wires
from the bracket on the valve rocker
arm cover(s) 'and position the wires
out of the way.
To remove the right valve rocker
arm cover, remove the carburetor
choke air heat tube, and the heat
chamber air inlet tube (except 427
V-8). Remove the crankcase ventila-
tion regulator valve or vent tube from
the rocker cover or oil separator.
4.
Remove the valve rocker arm
cover(s).
If the left cover is removed, posi-
tion the wire loom out of the way.
5. Crank the engine until the No.
I piston is on TDC at the end of the
compression stroke. Rotate the crank-
shaft damper an additional 45 degrees
(identified by X X
on the damper).
6. Start at the No. 4 cylinder and
loosen the valve rocker arm shaft
support bolts in sequence, two turns
at a time. After the bolts are all
loosened. remove the valve rocker
arm shaft assembly and the oil baf-
fle plate. On the left cylinder head
start at the No. 5 cylinder and follow
the same procedure on the valve
rocker arm shaft support bolts. This
procedure must be followed to avoid
damage to the rocker shaft.
INSTALLATION
1. Apply Lubriplate to the pad
end of the rocker arms, to the tip of
the valve stems, and to both ends of
the push rods.
2. If the crankshaft damper has
been moved, reposition it on the
XX
mark, following the procedure under
Step 5 of Removal above.
3. Position the baffle plate and the
valve rocker arm shaft assembly(ies)
on the cylinder heads with the valve
push rods in place and the rocker
shaft support bolts finger-tight. Be
sure the shaft is positioned so that
the oil holes are to the bottom. Also,
the identification notch (Fig. 26)
must be downward and toward the
front on the right bank, or toward
the rear on the left bank.
5. On the right cylinder head,
start at the No. 4 cylinder and tighten
the bolts in sequence, two turns at a
.
- -
FIG.
26-Typical Installation
Identification Mark-Rocker Arm
S h a f t Assembly
time, until the supports fully contact
the cylinder head. Torque the bolts in
sequence to specifications.
5. On the left cylinder head, start
at the No. 5 cylinder and follow the
same procedure fort the left valve
rocker arm shaft support bolts. The
additional time consumed in this
procedure will permit the hydraulic
lifters (if so equipped) to leak down.
This will minimize the possibility of
bending the push rods, valves or rock-
er arms. Be sure that the hydraulic
lifters have leaked down to their
normal operating position before