Jeep Cherokee 2000 Service Manual - page 1119
(3) Remove the rocker arms assemblies and push
rods. Refer to rocker arm and push rod removal and
installation in this section. Retain the push rods, and
rocker arms assemblies in the same order and posi-
tion as removed.
(4) Inspect the springs and retainer for cracks and
possible signs of weakening.
(5) Install an air hose adaptor in the fuel injector
hole.
(6) Connect an air hose to the adapter and apply
air pressure slowly. Maintain at least 621 kPa (90
psi) of air pressure in the cylinder to hold the valves
against their seats.
(7) Tap the retainer or tip with a rawhide hammer
to loosen the lock from the retainer. Use Valve Spring
Compressor Tool to compress the spring and remove
the locks.
(8) Remove the valve spring and retainer.
(9) Inspect the valve stems, especially the grooves.
An Arkansas smooth stone should be used to remove
nicks and high spots.
INSTALLATION
(1) Install the valve spring and retainer.
(2) Compress the valve spring with Valve Spring
Compressor Tool 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.
(3) Disconnect the air hose. Remove the adaptor
from the fuel injector hole and install the fuel injec-
tor.
(4) Repeat the procedures for each remaining valve
spring to be removed.
(5) Install the push rods. Ensure the bottom end of
each rod is centered in the plunger cap seat of the
hydraulic valve tappet.
(6) Install the rocker arm assemblies, in their orig-
inal locations. Torque nuts to 29.4 N·m (264 in. lbs.).
(7) Install the cylinder head cover. Refer to cylin-
der head cover removal and installation in this sec-
tion.
(8) Connect the negative battery cable.
ENGINE CYLINDER HEAD
REMOVAL
(1) Disconnect the negative battery 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 cooling system. Refer to Group 7,
Cooling System for procedure.
(3) Discharge
the
air
conditioning
system,
if
equipped. Refer to Group 24, Heating and Air Condi-
tioning for procedure.
(4) If equipped with air conditioning, remove the
A/C lines at the compressor and cap. Refer to Group
24, Heating and Air Conditioning. Remove A/C line
bracket attached to cylinder head cover, and move
A/C lines away from cylinder head.
(5) Remove the air cleaner hose from turbocharger
and breather hose.
(6) Remove the air cleaner assembly and breather
hose.
(7) Remove the generator support bracket.
(8) Remove the upper radiator hose and coolant
recovery hose.
(9) Remove the water manifold and recovery hose.
(10) Disconnect
the
heater
hoses
and
coolant
recover bottle hose.
(11) Disconnect the EGR tube from EGR valve.
(12) Remove the EGR valve
(13) Remove the exhaust heat shield from exhaust
manifold.
(14) Remove the exhaust heat shield from down
pipe.
(15) Remove the exhaust down pipe from turbo-
charger (Fig. 28).
(16) Disconnect the oil feed line from turbocharger.
Fig. 28 Turbocharger
1 – EGR TUBE
2 – EGR VALVE
3 – OIL FEED LINE
4 – OIL DRAIN
5 – TURBO
XJ
ENGINE
9 - 25
REMOVAL AND INSTALLATION (Continued)