Jeep Cherokee 2000 Service Manual - page 1073
INSTALLATION
CAUTION: Install oil seals carefully to prevent dam-
age from the sharp edges of the valve spring lock
grove.
(1) Lightly push the valve seal over the valve stem
and valve guide boss. Be sure the seal is completely
seated on the valve guide boss.
(2) Install valve spring and retainer.
(3) Compress the valve spring with Valve Spring
Compressor Tool MD-998772A and insert the valve
locks. Release the spring tension and remove the
tool. Tap the spring from side-to-side to ensure that
the spring is seated properly on the engine cylinder
head.
(4) Release air pressure and disconnect the air
hose. Remove the adaptor from the spark plug hole
and install the spark plug.
(5) Repeat the procedures for each remaining valve
spring to be removed.
(6) Install the push rods. Ensure the bottom end of
each rod is centered in the plunger cap seat of the
hydraulic valve tappet.
(7) Install the rocker arms, pivots and bridge at
their original location.
(8) Tighten the bridge cap screws alternately, one
at a time, to avoid damaging the bridge. Tighten the
cap screws to 28 N·m (21 ft. lbs.) torque.
(9) Install the engine cylinder head cover.
CYLINDER HEAD
This procedure can be done with the engine in or
out of the vehicle.
REMOVAL
(1) Disconnect the battery negative cable.
WARNING: DO
NOT
REMOVE
THE
CYLINDER
BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR
DRAIN COCK WITH THE SYSTEM HOT AND PRES-
SURIZED BECAUSE SERIOUS BURNS FROM THE
COOLANT CAN OCCUR.
(2) Drain the coolant and disconnect the hoses at
the engine thermostat housing and the water pump
inlet. DO NOT waste reusable coolant. If the solution
is clean and is being drained only to service the
engine or cooling system, drain the coolant into a
clean container for reuse.
(3) Remove the air cleaner assembly.
(4) Remove the engine cylinder head cover.
(5) Remove the capscrews, bridge and pivot assem-
blies and rocker arms.
(6) Remove the push rods. Retain the push rods,
bridges, pivots and rocker arms in the same
order as removed.
(7) Loosen the accessory drive belt at the power
steering pump. (Refer to Group 7, Cooling System for
the correct procedure). Slip the belt off of the power
steering pulley.
(8) Remove the A/C compressor mounting bolts
and secure the compressor to the side.
(9) Remove the power steering pump and bracket
from the intake manifold and water pump. Set the
pump and bracket aside. DO NOT disconnect the
hoses.
(10) Perform the Fuel System Pressure Release
procedure. (Refer to Group 14, Fuel System)
(11) Disconnect the fuel supply line at the fuel rail.
(Refer to Group 14, Quick-Connect Fittings for the
correct procedures)
(12) Remove the intake and engine exhaust mani-
folds from the engine cylinder head. (Refer to Group
11, Exhaust System and Intake Manifold for the
proper procedures)
(13) Disconnect the coil rail electrical connectors
and remove the coil rail.
(14) Remove spark plugs.
(15) Disconnect the temperature sending unit wire
connector.
(16) Remove the engine cylinder head bolts. Bolt
No.14 cannot be removed until the head is moved for-
ward (Fig. 55). Pull bolt No.14 out as far as it will go
and then suspend the bolt in this position (tape
around the bolt).
(17) Remove the engine cylinder head and gasket
(Fig. 55).
(18) If this was the first time the bolts were
removed, put a paint dab on the top of the bolt. If the
bolts have a paint dab on the top of the bolt or it
isn’t known if they were used before, discard the
bolts.
(19) Stuff clean lint free shop towels into the cyl-
inder bores.
NOTE: If the valves, springs, or seals are to be
inspected/replaced at this time, refer to Valves and
Valve Springs in this section for proper inspection
procedures.
INSTALLATION
The engine cylinder head gasket is a composition
gasket. The gasket is to be installed DRY. DO NOT
use a gasket sealing compound on the gasket.
If the engine cylinder head is to be replaced and
the original valves used, measure the valve stem
diameter. Only standard size valves can be used with
a service replacement engine cylinder head unless
the replacement head valve stem guide bores are
reamed
to
accommodate
oversize
valve
stems.
Remove all carbon buildup and reface the valves.
9 - 98
4.0L ENGINE
XJ
REMOVAL AND INSTALLATION (Continued)