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03-018-16
Engine, 4.6L (2V)
03-0 1 8-16
IN-VEHICLE SERVICE (Continued)
6. Compress valve spring (65 1 3) using Valve Spring
Compressor T91 P-6565-A.
VALVE SPRING SPACER
T91 P-6565-AH
VIEW A
A15052-C
7.
CAUTION: If air pressure has forced the
piston to the bottom of the cylinder, any loss
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 from happening and
still allow enough travel to check the valve
for binds and excessive guide-to-valve stem
clearance.
Remove valve spring retainer keys (65 18), valve
spring retainer (65 1 4) and valve spring.
8. Using locking pliers remove valve stem seal
(657 1).
9. Repeat Steps 2 through 8 until all necessary
valve stem seals are removed.
VALVE STEM
NOTE:
RH CYUNDER HEAD SHOWN
SEAL 6571
LH CYLINDER HEAD SIMILAR
A136»8
Installation
1 . NOTE: Piston must be at top dead center (TDC)
of cylinder being serviced.
Remove air pressure from spark plug adapter.
Inspect the valve stem for damage. Rotate the
valve and check the valve stem tip for eccentric
movement during rotation. Move the valve up and
down through normal travel in the valve guide and
check the stem for binds.
2.
CAUTION: If the valve has been damaged,
It
will be necessary to remove the cylinder
head for service. Refer to Section 03-00.
If the condition of the valve is satisfactory, apply
clean engine oil to the valve stem and hold the
valve closed. Apply the air pressure within the
cylinder.
3. Install new valve stem seal using Valve Stem Seal
Replacer T9 1 P-657 1-A.
VALVE STEM
SEAL REPLACER
T91 P-6571-A
A24777-A
4. Position valve spring and valve spring retainer
over valve stem.
5.
Install Valve Spring Spacer T9 1 P-6565-AH
between valve spring coils.
6. Compress valve spring using Valve Spring
Compressor T9 1 P-6565-A and install valve
spring retainer key.
7. Remove valve spring compressor and spacer.
1997
Thunderbird, Cougar July 1996