Valve Springs Removal; Rocker Arm Retaining Nut; Rocker Arms And Push Rods - Jeep 200 Cherokee Service Manual

9 - 24 ENGINE
REMOVAL AND INSTALLATION (Continued)
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, if
equipped. Refer to Group 24, Heating and Air Condi-
tioning for procedure.
(3) If equipped with air conditioning, remove the
service valves and cap the compressor ports. Refer to
Group 24, Heating and Air Conditioning.
(4) Remove the generator bracket.
(5) Remove the cylinder head cover. Refer to cylin-
der head cover removal and installation in this sec-
tion.
(6) Remove the rocker arm retaining nut (Fig. 27).
(7) Remove the rocker assembly. Place them on a
bench in the same order as removed.
(8) Remove the push rods and place them on a
bench in the same order as removed.
INSTALLATION
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.
2000 JEEP CHEROKEE
1 – ROCKER ARM ASSEMBLY
2 – ROCKER ARM RETAINING NUTS
3 – ROCKER ARM SPRING PLATE
• Bring piston # 1 to Top Dead Center.
• Rotate the engine 40° counter clockwise and
stop.
• At this point tighten all of the rocker arm nuts.
Torque nuts to 27 N·m (20 ft. lbs.).
NOTE: You must allow 30 minutes before starting
the engine once the rocker arms are torqued. This
will allow the hydraulic tappets to stabilize and pre-
vent the possibility of piston to valve contact.
(2) Install the cylinder head cover. Refer to cylin-
der head cover removal and installation in this
group.
(3) Evacuate and charge the air conditioning sys-
tem. Refer to Group 24, Heater and Air Conditioning.
(4) Connect the negative battery cable.
VALVE SPRINGS
This procedure can be done with the engine cylin-
der head installed on the block.
REMOVAL
(1) Disconnect the negative battery cable.
Each valve spring is held in place by a retainer
and a set of conical valve locks. The locks can be
removed only by compressing the valve spring.
(2) Remove the cylinder head cover. Refer to cylin-
der head cover removal and installation in this sec-
tion.
Fig. 27 Rocker Arm Retaining Nut
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