Jeep XJ. Manual — part 316
INSPECTION
(1) Inspect for cracks in the combustion chambers
and valve ports.
(2) Inspect for cracks on the exhaust seat.
(3) Inspect for cracks in the gasket surface at each
coolant passage.
(4) Inspect valves for burned, cracked or warped
heads.
(5) Inspect for scuffed or bent valve stems.
(6) Replace valves displaying any damage.
(7) Check valve spring height (Fig. 2).
VALVE REFACING
(1) Use a valve refacing machine to reface the
intake and exhaust valves to the specified angle.
(2) After refacing, a margin of at least 4.52-4.49
mm (.178-.177 inch) must remain (Fig. 3). If the mar-
gin is less than 4.49 mm (.177 inch), the valve must
be replaced.
VALVE SEAT REFACING
(1) Install a pilot of the correct size in the valve
guide bore. Reface the valve seat to the specified
angle with a good dressing stone. Remove only
enough metal to provide a smooth finish.
(2) Use tapered stones to obtain the specified seat
width when required.
VALVE STAND DOWN
Valve stand down is to maintain the adequate com-
pression ratio.
(1) Invert cylinder head.
(2) Fit each valve to its respective valve guide.
(3) Using a straight edge and feeler gauge (Fig. 4),
check valve head stand down: Inlet valve head stand
down 1.08 to 1.34 mm (.042 to.052 ins.) and exhaust
valve stand down.99 to 1.25 mm (.035 to.049
(3) ins.).
(4) If valve hea d stand down is not in accordance
with above, discard original valves, check stand down
Fig. 2 Valve Spring Chart
LOAD Kg
HEIGHT mm
STATE
P1
0.00
H1
44.65
FREE LENGTH
P2
32-36
H2
38.60
VALVE CLOSED
P3
89-96
H3
28.20
VALVE OPEN
Fig. 3 Valve Specification
MEASUREMENT
INTAKE
EXHAUST
A
7.940-7.960
7.922-7.940
B
8.00-8.015
8.000-8.015
C
1.08-1.34
0.990-1.250
D
2.2
6
0.08
2.09-+0.07 −0.09
E
1.80-2.20
1.65-2.05
F
2.73-3.44
2.45-3.02
G
41.962-41.985
35.964-35.987
H
42.070-42.086
36.050-36.066
I
7.14-7.19
7.00-7.05
L
3.11-3.26
3.10-3.25
9 - 12
ENGINE
XJ
SERVICE PROCEDURES (Continued)
2000 JEEP CHEROKEE
with new valves and recut valve seat inserts to
obtain correct stand down.
VALVE GUIDES
(1) Valve Guides height requirement.
(2) Measurement A (Fig. 5): 13.50 - 14.00 mm.
VALVE STEM-TO-GUIDE CLEARANCE
MEASUREMENT
(1) Measure and record internal diameter of valve
guides. Valve guide internal diameter is 8.0 to 8.015
mm (.3149 to.3155 ins.).
(2) Measure valve stems and record diameters.
Intake valve stem diameter 7.94 to 7.96 mm (.3125
to.3133 in). Exhaust valve stem diameter 7.92 to 7.94
mm (.3118 to.31215 in).
(3) Subtract diameter of valve stem from internal
diameter of its respective valve guide to obtain valve
stem clearance in valve guide. Clearance of inlet
valve stem in valve guide is.040 to.075 mm (.0015
to.0029 in). Clearance of exhaust valve stem in valve
guide is.060 to.093 mm (.0023 to.0036 in).
(4) If valve stem clearance in valve guide exceeds
tolerances, new valve guides must be installed.
REMOVAL AND INSTALLATION
ENGINE MOUNTS — LHD DIESEL
The engine mounts support the engine at each
side. These supports are made of resilient rubber.
REMOVAL—RIGHT SIDE
(1) Disconnect the negative battery cable.
(2) Remove the innercooler inlet hose from the tur-
bocharger and position it out of the way (Fig. 6).
(3) Remove the right engine mount upper sill plate
nuts.
(4) Raise the vehicle on a hoist.
(5) Remove the oil filter and adaptor from the
engine.
(6) Remove the engine mount throughbolt nut only.
Do not remove the bolt at this time.
(7) Position a jack stand and raise the weight off
the right engine mount.
(8) Remove the (2) engine mount lower sill plate
bolts.
(9) Remove the (4) engine mount bracket bolts
from the engine block.
(10) Remove the engine mount through bolt.
(11) Remove the right engine mount from the vehicle.
Fig. 4 Checking Valve Stand Down
Fig. 5 Valve Guide Height
Fig. 6 Engine Compartment View — Diesel
1 – INTAKE MANIFOLD ELBOW
2 – BREATHER HOSE
3 – INNERCOOLER OUTLET HOSE
4 – AIR FILTER COVER
5 – AIR FILTER OUTLET (FRESH AIR) HOSE
6 – INNERCOOLER INLET HOSE
7 – HEATER CORE COOLANT SUPPLY HOSES
XJ
ENGINE
9 - 13
SERVICE PROCEDURES (Continued)
2000 JEEP CHEROKEE
INSTALLATION—RIGHT SIDE
(1) Position the engine mount and bracket and
install the engine mount through bolt and nut, leav-
ing them loose at this time.
(2) Install, but do not torque the engine mount
lower sill plate bolts.
(3) Install the (4) engine mount bracket to engine
block retaining bolts and torque to 61 N·m (45 ft.
lbs.).
(4) Torque the engine mount lower sill plate bolts
to 41 N·m (30 ft. lbs.).
(5) Remove the jack stand.
(6) Torque the engine mount throughbolt nut to 65
N·m (48 ft. lbs.).
(7) Install the oil filter and adaptor on the engine.
Torque the adaptor retaining bolt to 69 N·m (51 ft.
lbs.).
(8) Lower the vehicle from the hoist.
(9) Install the engine mount upper sill plate nuts.
Torque to 41 N·m (30 ft. lbs.).
(10) Install the innercooler inlet hose on the turbo-
charger (Fig. 6).
(11) Connect the negative battery cable.
REMOVAL—LEFT SIDE
(1) Disconnect the negative battery cable.
(2) Remove the refrigerant line support bracket
from the rear of the rocker cover.
(3) Disconnect the A/C compressor electrical con-
nector.
(4) Remove the (2) engine mount upper sill plate
nuts (Fig. 7).
(5) Make sure the steering shaft is in the unlocked
position. Raise the vehicle on a hoist.
(6) Remove the steering shaft pinchbolt. Remove
the shaft from the gearbox by sliding it straight off
the gearbox input shaft.
CAUTION: Do not rotate the steering shaft while
removed from the gearbox input shaft. Damage to
the steering column clockspring will occur.
(7) Remove the left engine mount throughbolt nut
only (Fig. 8). Do not remove the bolt at this time.
(8) Loosen the (4) H-Block retaining bolts, Do not
remove the bolts at this time.
NOTE: Mark the position of the H-Block in relation
to the power steering pump and the A/C Compres-
sor so it may be installed in its original position.
(9) Remove the (2) H-Block retaining bolts from
the power steering pump side of the block (Fig. 8).
(10) Support the A/C Compressor with mechanics
wire before proceeding to the next step.
(11) Remove the (4) A/C Compressor retaining
bolts (Fig. 8).
(12) Remove the remaining (2) bolts from the
H-Block and remove the H-Block from the compres-
sor.
Fig. 7 Left Engine Mount Sill Plate Nuts
1 – SILL PLATE NUTS
2 – STEERING SHAFT
3 – ENGINE MOUNT
Fig. 8 A/C Compressor Position & Orientation
1 – A/C COMPRESSOR MOUNTING BOLTS
2 – LEFT ENGINE MOUNT THROUGHBOLT NUT
3 – H BLOCK BOLTS
4 – COUPLER PINCH BOLT
5 – COMPRESSOR ELECTRICAL CONNECTOR
9 - 14
ENGINE
XJ
REMOVAL AND INSTALLATION (Continued)
2000 JEEP CHEROKEE
(13) Position a jack stand and raise the weight off
the left engine mount.
(14) Remove the (4) engine mount bracket bolts
from the engine block.
(15) Remove the (4) trackbar support bracket bolts
and remove the bracket (Fig. 9).
(16) Remove the remaining engine mount lower
sill plate bolt (Fig. 9).
(17) Remove the engine mount troughbolt.
(18) Remove the left engine mount from the vehi-
cle.
INSTALLATION—LEFT SIDE
(1) Position the engine mount and bracket and
install the engine mount through bolt and nut, leav-
ing them loose at this time.
(2) Install, but do not torque the engine mount
lower sill plate bolt and the trackbar support bracket
bolts (Fig. 9).
(3) Install the (4) engine mount bracket bolts.
Torque to 61 N·m (45 ft. lbs.).
(4) Torque the lower engine mount sill plate bolts
to 41 N·m (30 ft. lbs.) (Fig. 9).
(5) Torque the larger trackbar support bracket
bolts to 125 N·m (92 ft. lbs.) (Fig. 9).
(6) Remove the jack stand.
(7) Position the H-Block and the A/C Compressor
in there original positions and install the retaining
bolts (Fig. 10).
(8) Torque the A/C Compressor mounting bolts to
41 N·m (30 ft. lbs.) (Fig. 10).
(9) Torque all the H-Block retaining bolts to 18
N·m (159 in. lbs.).
(10) Torque the engine mount throughbolt nut to
65 N·m (48 ft. lbs.) (Fig. 10).
(11) Install the steering shaft. Torque the pinch-
bolt to 49 N·m (36 ft. lbs.).
(12) Lower the vehicle from the hoist.
(13) Install the engine mount upper sill plate nuts.
Torque to 41 N·m (30 ft. lbs.) (Fig. 11).
(14) Install the refrigerant line support bracket on
the rear of the rocker cover.
(15) Connect the A/C compressor electrical connec-
tor.
(16) Connect the negative battery cable.
ENGINE MOUNTS — RHD DIESEL
The engine mounts support the engine at each
side. These supports are made of resilient rubber.
REMOVAL—RIGHT SIDE
(1) Disconnect the negative battery cable.
(2) Make
sure
the
steering
wheel
is
in
the
unlocked position. Raise the vehicle on a hoist.
(3) Remove the steering shaft pinchbolt and slide
the steering shaft straight off the gearbox input
shaft.
Fig. 9 Left Engine Mount Retaining Bolts
1 – TRACK BAR SUPPORT BRACKET RETAINING BOLTS
2 – ENGINE MOUNT SILL PLATE BOLT
Fig. 10 A/C Compressor Position & Orientation
1 – A/C COMPRESSOR MOUNTING BOLTS
2 – LEFT ENGINE MOUNT THROUGHBOLT NUT
3 – H BLOCK BOLTS
4 – COUPLER PINCH BOLT
5 – COMPRESSOR ELECTRICAL CONNECTOR
XJ
ENGINE
9 - 15
REMOVAL AND INSTALLATION (Continued)
2000 JEEP CHEROKEE
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