Ford COUGAR 1968 Shop Manual page 325

PART 8-2
-
170 And 200 Six
its stroke. Using the valve spring
compression tool shown in Fig. 25,
compress the valve and remove the
valve spring retainer locks, the sleeve,
spring retainer and the valve spring.
If air pressure fails to hold the valve
in the closed position during this op-
eration, i t can be presumed that the
valve is not seating or is damaged.
I f
this condition occurs, remove the
cylinder head for further inspection.
FIG.
25-Compressing Valve
Spring-In Chassis
6. Remove the valve stem seal
(Fig. 26). I f air pressure has forced
the piston to the bottom of the cyl-
inder, any removal of air pressure
will allow the valve(s) to fall into the
cylinder.
A
rubber band, tape or
string wrapped around the end of the
valve stem will prevent this condition
and will still allow enough travel to
check the valve for binds.
7. lnstall a new valve stem seal.
Position the spring over the valve.
lnstall the spring retainer and sleeve.
Compress the valve spring and install
the valve spring retainer locks.
8. Apply Lubriplate to both ends
of the push rod, the valve and push
rod ends of the rocker arm, and the
valve stem tip. Remove the rocker
FIG.
26-Valve Stem S e a l
Removal
arm shaft and install the push rod(s),
making sure the lower end of the
rod is positioned in the valve lifter
push rod cup.
9. Remove the wire securing the
valve rocker arm and slide the rock-
er arm into position. I f an end valve
rocker arm was removed, slide it
into position on the shaft and install
the spring washer and retainer pin.
Turn off the air and remove the ail
line and adapter. lnstall the spark
plug and spark plug wire.
10. lnstall the rocker arm shaft
by following the instructions under
Rocker Arm Shaft Assembly Instal-
lation.
11. Clean the valve rocker arm co-
ver and cylinder head gasket surfaces.
Coat one side of a new gasket with
an oil-resistant sealer and lay the
cemented side of the gasket on the
cover. lnstall the cover making sure
the gasket seats evenly around the
head. Tighten the .cover retaining
bolts in two steps. First, torque the
bolts to specifications. Two minutes
later, torque the bolts to the same
specifications.
12. On Thermactor engines, in-
stall the intermediate exhaust air sup-
ply tube assembly. Connect the air
hose at the check valve.
13. Insert the regulator valve (with
the vent hose attached) into the valve
rocker arm cover mounting grommet.
lnstall the air cleaner.
WATER P U M P
REMOVAL
1. Drain the cooling system.
Remove the power steering, air
conditioner, and Thermactor drive
belts, i f so equipped.
2.
Disconnect the radiator lower
hose at the water pump. Remove the
drive belt, fan, or fan and drive clutch.
and water pump pulley.
3. Disconnect the heater hose at
the water pump.
4.
Remove the water pump.
INSTALLATION
Before a water pump is re-install-
ed, check it for damage. I f it is dam-
aged, replace it.
I.
I f a new water pump is to be
installed, remove the heater hose
fitting from the old pump and install
it on the new pump. Clean the gas-
ket surfaces on the water pump and
cylinder block.
2. Coat a new gasket on both
sides with water-resistant sealer and
position it on the cylinder block.
3. Position the water pump in
place and install the lock washers
and retaining bolts (the alternator
adjusting arm is retained by one wa-
ter pump bolt). Torque the bolt to
specifications.
4. Connect the radiator lower
hose and the heater hose to the water
pump.
5.
lnstall the water pump pulley
and fan or fan and drive clutch.
Torque the bolts evenly and alter-
nately to specifications.
6. lnstall the power steering,
air conditioner and Thermactor air
pump drive belts, if so equipped, and
adjust the tension to specifications.
7. Fill and bleed the cooling sys-
tem. Operate the engine until normal
operating temperature is reached.
Check for leaks and check the cool-
ant level.
CYLINDER FRONT COVER
A N D T I M I N G C H A I N
REMOVAL
1. Drain the cooling system and
the crankcase. Disconnect the radia-
tor upper hose at the coolant outlet
housing and the radiator lower hose
at the water pump. On a vehicle with
automatic transmission, disconnect
the transmission oil cooler lines from
the radiator.
2. Remove the radiator. Remove
the drive belt, fan and pulley. On a
vehicle with air conditioning remove
the condenser retaining bolts and posi-
tion the condenser forward. D o not
disconnect the refrigerant lines. Re-
move the compressor drive belt. On
Thermactor engines remove the air
supply pump drive belt. If so equip-
ped, remove the accessory drive pulley.
Using tool T58P-6316-A, remove the
crankshaft damper.
3. Remove the cylinder front cov-
er and gasket.
4.
Rotate the crankshaft in a
clockwise direction (as viewed from
the front) to take up the slack on the
left side of the chain.
5.
Establish a reference point on
the block and measure from this
point to the chain. Rotate the crank-
shaft in the opposite direction to
take up the slack on the right side
of the chain. Force the left side of
the chain out with the fingers and
measure the distance between the re-
ference point and the chain. The de-
flection is the difference between the
two measurements. I f the deflection
exceeds 112 inch, replace the timing
chain and sprockets.