03-01A-12
Engine, 3.8L
03·01A- 1 2
IN-VEHICLE SERVICE (Continued)
6. Remove valve spring compressor.
7. Turn air supply off and remove adapter from
spark plug hole.
8.
Install spark plug. Refer to Section 03-Q7 A.
9. Install rocker arms and valve covers as
described.
10. Start engine and check for leaks.
Valve Tappet, Hydraulic
NOTE: Before replacing a valve tappet (6500) for
noisy operation, make sure the noise is not caused by
improper valve-to-rocker arm clearance or by worn
rocker arms (6564) or push rods (6565).
SPECIAL SERVICE TOOL(S) REQUIRED
Description
Tool Number
Spark Plug Wire Remover
T74P-6666·A
Removal
1 . Disconnect ignition wires at the spark plugs
(1 2405). To avoid damaging ignition wires use
Spark Plug Wire Remover T7 4P-6666·A. Refer to
Section 03-Q7 A.
2. Remove ignition wire routing clips from studs on
the valve cover retaining bolts. Lay ignition wires
with routing clips toward front of engine.
3. Remove upper intake manifold (9424) as
described.
4. Remove valve covers (6582) as described.
5. Remove lower intake manifold as described.
6. Sufficiently loosen each rocker arm seat retaining
bolt to allow rocker arm to be lifted off push rod
and rotated to one side.
7.
Remove push rods. The location of each push rod
should be identified. When engine is assembled,
each push rod should be installed in its original
position.
8.
Remove four bolts holding two tappet guide
plates and retainers (6K564) in place (bolts are
held captive in retainers). Remove six valve
tappet guide plates (6K51 2) from adjacent valve
tappets.
9. Remove valve tappets using a magnet The
location of each valve tappet should be identified.
When engine is assembled, each valve tappet
should be installed in its origi�al position.
If
valve tappets are stuck in bores due to
excessive varnish or gum deposits, it may be
necessary to use a claw-type tool to aid removal.
When using a remover tool, rotate valve tappet
back and forth to loosen it from gum or varnish
that may have formed on the valve tappet.
Installation
1 . Using solvent, clean the cylinder head (6049) and
valve sealing surfaces.
2. NOTE: Lightly oil all bolt and stud threads before
installation, except those specifying special
sealant.
Lubricate each valve tappet and bore with Engine
Assembly Lubricant D9AZ-1 9579-D or equivalent
meeting Ford specification ESR-M99C80-A.
3.
Install each valve tappet in bore from which it was
removed.
If
new valve tappets are being installed,
check for free fit in bore into which they are to be
installed.
4.
Align flats on side of valve tappets and install six
valve tappet guide plates between adjacent valve
tappets (make sure the word "up" is showing).
Install two tappet guide plates and retainers and
tighten four captive bolts to 1 Q- 1 4 N·m (89-1 23
lb-in).
5.
Dip each push rod end in Engine Assembly
Lubricant D9AZ-1 9579-D or equivalent meeting
Ford specification ESR-M99C8Q-A. Install push
rods in their original location.
6.
Lubricate all rocker arms with Engine Assembly
Lubricant D9AZ - 19579-D or equivalent meeting
Ford specification ESR-M99C8Q-A.
7.
CAUTION: Rocker arm seats (6A528) must
be fully seated
in
cylinder heads and push
rods must be seated in rocker arm sockets
prior to final tightening or possible damage
to engine may occur.
For each valve, rotate crankshaft (6303) until
valve tappet rests onto heel (base circle) of
camshaft lobe. Position rocker arms over push
rods. Install rocker arm seats. Initially tighten
rocker arm seat retaining bolts to 5 N·m (44 1b-in)
MAX.
Final-tighten rocker arm seat bolts to 30-40 N·m
(22-29 lb-ft). For final tightening, the camshaft
(6250) may be in any position.
8.
Install lower intake manifold as described.
9. Install rocker arms as described.
10. Install upper intake manifold as described.
1 1 . Install ignition wire routing clips and connect
ignition wires to the spark plugs. Refer to Section
03-Q?A.
1997 Thunderbird, Cougar July 1996