l-29
BASIC ENGINE
l-29
REMOVAL AND INSTALLATION (Continued)
VALVE SPRING, RETAINER AND STEM
SEAL
Broken valve springs or defective valve stem
seals or retainers may be replaced without re-
moving the cylinder head if valve or valve seat is
not damaged.
Removal
1. If defective spring, retainer, or seal is on
right side of engine, remove air cleaner and
intake duct assembly. Remove PCV valve
and hose from right valve rocker arm cover.
If defective spring, retainer, or seal is on left
side of engine, remove oil filler cap and
ventilation hose from left valve rocker arm
cover and position out of way.
2. Remove valve rocker arm cover(s) and ap-
plicable spark plug(s).
3. Remove valve rocker arm bolts, oil deflec-
tors, fulcrum seats, rocker arms, and push
rods from affected cylinder(s).
4. Install air line with adapter in spark plug
hole. Turn on air supply to hold valves
closed.
5. Install Tool T70P-6049-A and compress
valve spring. Remove retainer locks, spring
retainer, and spri,ng. Remove and discard
valve stem seal.
If air pressure fails to
hold valve in closed position, valve
damage affecting sealing is indicated.
Remove and inspect cylinder head
assembly.
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Ins
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Wrap rubber band, tape or string around
end of valve stem to prevent valve from
dropping into cylinder when air pressure in
cylinder is shut off if piston is at bottom of
cylinder. Shut off air pressure.
Inspect valve stem for damage. Rotate ’
valve, checking tip for eccentric movement.
Move valve up and down through normal
travel in valve guide and check for binding.
If valve is damaged, cylinder head must
be removed for repairs.
tallation
If valve proves satisfactory, hold valve
closed and turn on air pressure in cylinder.
Lubricate the valve stems with heavy engine
oil. Install new valve stem seal. Set spring
and retainer over valve stem. Compress
valve spring and install retainer locks. Re-
lease spring and remove tool.
Shut off air pressure and remove air line and
adapter. Install spark plug.
Apply Ford Polyethylene Grease
DOAZ-19584-A to tip of valve stem and each
end of push rod. Install push rod.
Be sure
lower end of push rod is seated in valve
lifter.
Lubricate fulcrum seats and sockets with
Ford Polyethylene Grease DOAZ-19584-A or
equivalent.
Lubricate the push rod socket, fulcrum seat
and the valve pad of the rocker arm with
heavy engine oil.
Install the rocker arms and rocker arm cov-
ers using the procedure and sequence given
under Rocker Arm Installation.
If the right cover was removed, install PCV
valve.
Install the spark plug and connect the spark
plug wires.
Install the air cleaner and intake duct
assembly.
Connect the automatic choke heat chamber
air inlet hose.
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