Jeep XJ. Manual — part 290
suited to your area’s particular ambient temperature
range and variation (Fig. 38).
ENERGY CONSERVING OIL
An Energy Conserving type oil is recommended for
gasoline engines. The designation of ENERGY CON-
SERVING is located on the label of an engine oil con-
tainer.
CRANKCASE OIL LEVEL INSPECTION
CAUTION: Do not overfill crankcase with engine oil,
oil foaming and oil pressure loss can result.
The engine oil level indicator (Dipstick) is located
at the right rear of the 2.5L engine. Inspect engine
oil level approximately every 800 kilometers (500
miles). Unless the engine has exhibited loss of oil
pressure, run the engine for about five minutes
before checking oil level. Checking engine oil level on
a cold engine is not accurate.
To ensure proper lubrication of an engine, the
engine oil must be maintained at an acceptable level.
The acceptable levels are indicated between the ADD
and SAFE marks on the engine oil dipstick (Fig. 39).
(1) Position vehicle on level surface.
(2) With engine OFF, allow approximately ten min-
utes for oil to settle to bottom of crankcase, remove
engine oil dipstick.
(3) Wipe dipstick clean.
(4) Install dipstick and verify it is seated in the
tube.
(5) Remove dipstick, with handle held above the
tip, note oil level reading (Fig. 39).
(6) Add oil only if level is below the ADD mark on
dipstick.
ENGINE OIL CHANGE
Change engine oil at mileage and time intervals
described in Maintenance Schedules.
Run engine until achieving normal operating tem-
perature.
(1) Position the vehicle on a level surface and turn
engine off.
(2) Hoist and support vehicle on safety stands.
(3) Remove oil fill cap.
(4) Place a suitable drain pan under crankcase
drain.
(5) Remove drain plug from crankcase and allow
oil to drain into pan. Inspect drain plug threads for
stretching or other damage. Replace drain plug if
damaged.
(6) Install drain plug in crankcase.
(7) Lower vehicle and fill crankcase with specified
type and amount of engine oil described in this sec-
tion.
(8) Install oil fill cap.
(9) Start engine and inspect for leaks.
(10) Stop engine and inspect oil level.
Fig. 37 Engine Oil Container Standard Notations
Fig. 38 Temperature/Engine Oil Viscosity
Fig. 39 Engine Oil Dipstick—2.5L Engine
1 – DIPSTICK
2 – SAFE
3 – ADD
9 - 28
2.5L ENGINE
XJ
SERVICE PROCEDURES (Continued)
ENGINE OIL FILTER CHANGE
FILTER SPECIFICATION
CAUTION: Do not use oil filter with metric threads.
The proper oil filter has SAE type 3/4 X 16 threads.
An oil filter with metric threads can result in oil
leaks and engine failure.
All Jeep engines are equipped with a high quality
full-flow, throw-away type oil filter. Chrysler Corpo-
ration recommends a Mopar or equivalent oil filter be
used.
OIL FILTER REMOVAL
(1) Position a drain pan under the oil filter.
(2) Using a suitable oil filter wrench loosen filter.
(3) Rotate the oil filter counterclockwise to remove
it from the cylinder block oil filter boss (Fig. 40).
(4) When filter separates from adapter nipple, tip
gasket end upward to minimize oil spill. Remove fil-
ter from vehicle.
(5) With a wiping cloth, clean the gasket sealing
surface (Fig. 41) of oil and grime.
OIL FILTER INSTALLATION
(1) Lightly lubricate oil filter gasket with engine
oil or chassis grease.
(2) Thread filter onto adapter nipple. When gasket
makes contact with sealing surface, (Fig. 41) hand
tighten filter one full turn, do not over tighten.
(3) Add oil, verify crankcase oil level and start
engine. Inspect for oil leaks.
USED ENGINE OIL DISPOSAL
Care should be exercised when disposing used
engine oil after it has been drained from a vehicle
engine. Refer to the WARNING at beginning of this
section.
REMOVAL AND INSTALLATION
ENGINE MOUNTS—FRONT
The front mounts support the engine at each side.
These supports are made of resilient rubber.
REMOVAL
(1) Disconnect negative cable from battery.
(2) Raise the vehicle.
(3) Support the engine.
(4) Remove through bolt nut (Fig. 42). DO NOT
remove the through bolt.
(5) Remove the retaining bolts and nuts from the
support cushions (Fig. 42).
(6) Remove the through bolt.
(7) Remove the support cushions.
INSTALLATION
(1) If the engine support bracket was removed,
position the LEFT bracket (Fig. 42) and the RIGHT
bracket (Fig. 43) onto the cylinder block. Install the
bolts and stud nuts.
(a) RIGHT SIDE (Fig. 43) —Tighten the bolts to
61 N·m (45 ft. lbs.) torque. Tighten the stud nuts to
46 N·m (34 ft. lbs.) torque.
(b) LEFT SIDE (Fig. 42) —Tighten the bolts to
61 N·m (45 ft. lbs.) torque.
(2) If the support cushion brackets were removed,
position the brackets onto the lower front sill (Fig.
42) (Fig. 44). Install the bolts and stud nuts. Tighten
the bolts to 54 N·m (40 ft. lbs.) torque and the stud
nuts to 41 N·m (30 ft. lbs.) torque.
Fig. 40 Oil Filter—2.5L Engine
1 – OIL FILTER
Fig. 41 Oil Filter Sealing Surface—Typical
1 – SEALING SURFACE
2 – RUBBER GASKET
3 – OIL FILTER
XJ
2.5L ENGINE
9 - 29
SERVICE PROCEDURES (Continued)
(3) Place the support cushions onto the support
cushion brackets (Fig. 42). Tighten the right support
cushion nuts to 65 N·m (48 ft. lbs.) torque. Tighten
the left support cushion bolt and nut to 41 N·m (30
ft. lbs.) torque.
(4) Install the through bolt and the retaining nut
(Fig. 42). Tighten the through bolt nut to 65 N·m (48
ft. lbs.) torque.
(5) Remove the engine support.
(6) Lower the vehicle.
(7) Connect negative cable to battery.
ENGINE MOUNT—REAR
A resilient rubber cushion supports the transmis-
sion at the rear between the transmission extension
housing and the rear support crossmember or skid
plate.
REMOVAL
(1) Disconnect negative cable from battery.
(2) Raise the vehicle and support the transmission.
(3) Remove the nuts holding the support cushion
to the crossmember (Fig. 45) (Fig. 46). Remove the
crossmember.
MANUAL TRANSMISSION:
a. Remove the support cushion nuts and remove
the cushion.
b. If necessary, remove the bolts holding the trans-
mission support bracket to the transmission (Fig. 45).
Remove the bracket.
Fig. 42 Front Mounts
1 – ENGINE SUPPORT BRACKET
2 – THROUGH BOLT
3 – RETAINING BOLT
4 – SUPPORT CUSHION
5 – ATTACHING BOLT
6 – SUPPORT CUSHION
7 – THROUGH BOLT
8 – ENGINE SUPPORT BRACKET
9 – SUPPORT CUSHION BRACKET
10 – SILL
Fig. 43 Engine Support Bracket—Right Side
1 – ENGINE SUPPORT BRACKET
Fig. 44 Support Cushion Bracket—Left Side
1 – LOWER FRONT SILL
2 – TRACK BAR MOUNTING PLATE
3 – SUPPORT CUSHION BRACKET
9 - 30
2.5L ENGINE
XJ
REMOVAL AND INSTALLATION (Continued)
AUTOMATIC TRANSMISSION:
a. Remove the support cushion bolts and remove
the cushion and the transmission support bracket.
b. If necessary on 2WD vehicles, remove the bolts
holding the transmission support adaptor bracket to
the transmission (Fig. 46). Remove the adaptor
bracket.
INSTALLATION
MANUAL TRANSMISSION:
a. If removed, position the transmission support
bracket to the transmission and install the bolts.
Tighten the bolts to 43 N·m (32 ft. lbs.) torque.
b. Position the support cushion onto the transmis-
sion support bracket. Install and tighten the nuts to
46 N·m (34 ft. lbs.) torque.
AUTOMATIC TRANSMISSION:
a. If removed, position the transmission support
adaptor bracket (2WD vehicles) to the transmission
and install the bolts. Tighten the bolts to 75 N·m (55
ft. lbs.) torque.
b. Position the transmission support bracket and
support cushion to the transmission and install the
bolts. Tighten the bolts to 75 N·m (55 ft. lbs.) torque.
(1) Position the crossmember onto the support
cushion studs and install the nuts. Tighten the nuts
to 22 N·m (192 in. lbs.) torque.
(2) Install the crossmember to sill bolts and
tighten to 41 N·m (30 ft. lbs.) torque.
(3) Remove the transmission support.
(4) Lower the vehicle.
(5) Connect negative cable to battery.
ENGINE
REMOVAL
(1) Disconnect the battery cables. Remove the bat-
tery.
(2) Mark the hinge locations on the hood panel for
alignment reference during installation. Remove the
engine compartment lamp. Remove the hood.
WARNING: THE COOLANT IN A RECENTLY OPER-
ATED ENGINE IS HOT AND PRESSURIZED. USE
CARE TO PREVENT SCALDING BY HOT COOLANT.
CAREFULLY RELEASE THE PRESSURE BEFORE
REMOVING THE RADIATOR DRAIN COCK AND CAP.
(3) Loosen the radiator drain cock and radiator cap
to drain the coolant. DO NOT waste usable coolant.
If the solution is clean, drain the coolant into a clean
container for reuse.
(4) Remove the air cleaner assembly (Fig. 47).
(5) Remove the lower radiator hose.
Fig. 45 Rear Mount (Manual Transmission)
1 – TRANSMISSION SUPPORT BRACKET
2 – SUPPORT CUSHION
Fig. 46 Rear Mount (Automatic Transmission)
1 – 4
3
4
2 – 2
3
4
3 – TRANSMISSION SUPPORT ADAPTOR BRACKET
4 – SUPPORT CUSHION
5 – CROSSMEMBER ASSEMBLY
6 – TRANSMISSION SUPPORT BRACKET
XJ
2.5L ENGINE
9 - 31
REMOVAL AND INSTALLATION (Continued)
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