Specifications

(5) Remove cylinder head cover. Refer to cylinder
head cover removal and installation procedure in this
section.
(6) Remove the rocker assemblies and push rods.
Refer to rocker arms and push rod removal and
installation procedure in this section. Identify push
rods to ensure installation in original location.
(7) Remove cylinder head, intake manifold, and
exhaust manifold. Refer to cylinder head removal
and installation in this section.
(8) Remove the tappet retainers (Fig. 51).
(9) Slide Hydraulic Tappet Remover/Installer Tool
through opening in block and seat tool firmly in the
head of tappet.
(10) Pull the tappet out of the bore with a twisting
motion. If all tappets are to be removed, identify tap-
pets to ensure installation in original location.
CAUTION: The plunger and tappet bodies are not
interchangeable. The plunger and valve must
always be fitted to the original body. It is advisable
to work on one tappet at a time to avoid mixing of
parts. Mixed parts are not compatible. DO NOT dis-
assemble a tappet on a dirty work bench.
INSTALLATION
(1) Lubricate the tappets.
(2) Install the tappets and retainers in their origi-
nal positions. Ensure that the oil feed hole in the
side of the tappet body faces up (away from the
crankshaft).
(3) Install the cylinder head, intake manifold, and
exhaust manifold. Refer to cylinder head removal
and installation in this section.
(4) Install the push rods.
(5) Install the rocker arms. Refer to rocker arms
and push rod removal and installation in this section.
(6) Install the cylinder head cover. Refer to cylin-
der head cover removal and installation in this sec-
tion.
(7) Connect the negative battery cable.
CAUTION: To prevent damage to valve mechanism,
engine must not be run above fast idle until all
hydraulic tappets have filled with oil and have
become quiet.
(8) Start and operate engine. Warm up to normal
operating temperature.
ROCKER ARMS AND PUSH RODS
REMOVAL
(1) Disconnect the negative battery cable.
(2) Discharge the air conditioning system. Refer to
Group 24, Heating and Air Conditioning for proce-
dure.
(3) Remove the service valves and cap the com-
pressor ports. Refer to Group 24, Heating and Air
Conditioning.
(4) Remove the cylinder head cover. Refer to cylin-
der head cover removal and installation in this sec-
tion.
(5) Remove the rocker arm retaining nut (Fig. 52)
(Fig. 53).
(6) Remove the rocker assembly. Place them on a
bench in the same order as removed.
(7) Remove the push rods and place them on a
bench in the same order as removed.
INSTALLATION
(1) Rotate the crankshaft until the mark lines up
with the TDC mark on the timing cover.
(2) Install the push rods in the same order as
removed.
WARNING: During the installation of the rocker arm
assemblies it is possible to cause valve interfer-
ence between the piston and valve if the piston is
near Top Dead Center (TDC). This is due to the slow
bleed down rate of the tappets when adjusting the
rocker arm assemblies. Follow the procedure below
to ensure that engine damage does not occur.
• Install the rocker arm assemblies in the same
order as removed.
• Bring piston#1toTopDead Center.
Fig. 51 Tappet And Retainer
9 - 30 ENGINE WJ
REMOVAL AND INSTALLATION (Continued)