Page 2857 of 4284

The turbocharger is lubricated by engine oil that is
pressurized, cooled, and filtered. The oil is delivered
to the turbocharger by a supply line that is tapped
into the oil filter head. The oil travels into the bear-
ing housing, where it lubricates the shaft and bear-
ings (Fig. 4). A return pipe at the bottom of the
bearing housing, routes the engine oil back to the
crankcase.
The most common turbocharger failure is bearing
failure related to repeated hot shutdowns with inad-
equate ªcool-downº periods. A sudden engine shut
down after prolonged operation will result in the
transfer of heat from the turbine section of the tur-bocharger to the bearing housing. This causes the oil
to overheat and break down, which causes bearing
and shaft damage the next time the vehicle is
started.
Letting the engine idle after extended operation
allows the turbine housing to cool to normal operat-
ing temperature. The following chart should be used
as a guide in determining the amount of engine idle
time required to sufficiently cool down the turbo-
charger before shut down, depending upon the type
of driving and the amount of cargo.
TURBOCHARGER(COOL DOWN(CHART
Driving Load Turbocharger Idle Time (in
minutes)
Condition Temperature Before Shut
Down
Stop & Go Empty Cool Less than 1
Stop & Go Medium Warm 1
Highway
SpeedsMedium Warm 2
City Traffic Max.
GCWRWarm 3
Highway
SpeedsMax.
GCWRWarm 4
Uphill
GradeMax.
GCWRHot 5
Fig. 3 Wastegate Operation
1 - SIGNAL LINE
2 - EXHAUST BYPASS VALVE
3 - WASTE GATE
4 - EXHAUST
5 - TURBINE
6 - EXHAUST BYPASS VALVE
7 - WASTE GATE
8 - EXHAUST
9 - TURBINE
10 - SIGNAL LINE
Fig. 4 Turbocharger Oil Supply and Drain
1 - BEARINGS
2 - OIL SUPPLY (FROM ENGINE BLOCK)
3 - OIL RETURN (TO SUMP)
RGEXHAUST SYSTEM AND TURBOCHARGER11a-3
TURBOCHARGER SYSTEM (Continued)
Page 2858 of 4284

TURBOCHARGER
REMOVAL
The exhaust manifold and turbocharger cannot be
remove with the engine in vehicle.
(1) Remove engine from vehicle and mount on
engine stand (Refer to 9 - ENGINE - REMOVAL) .
(2) Remove thermostat to upper radiator hose pipe
(Fig. 5).(3) Remove engine lift hook (Fig. 6).
(4) Remove exhaust manifold heat shield (Fig. 6).
(5) Disconnect turbocharger oil supply and return
lines at turbocharger (Fig. 6).
(6) Remove exhaust manifold retaining nuts (Fig.
6).
(7) Remove exhaust manifold and turbocharger
from engine (Fig. 6).
Fig. 5 TURBOCHARGER AND COOLANT PIPES
1 - TURBOCHARGER OUTLET PIPE RETAINING BOLT
2 - TURBOCHARGER OUTLET PIPE
3 - ADAPTER HOSE
4 - HEAT SHIELD
5 - HOSE CLAMPS
6 - TURBOCHARGER INLET PIPE RETAINING BOLT
7 - TURBOCHARGER INLET PIPE
8 - ADAPTER HOSE
9 - HOSE CLAMPS
10 - CLAMP
11 - EGR VALVE TO INTAKE AIR INLET PIPE
12 - CLAMP
13 - THERMOSTAT HOUSING TO UPPER RADIATOR HOSE
PIPE
Fig. 6 EXHAUST MANIFOLD AND TURBOCHARGER
1 - TURBOCHARGER OIL SUPPLY BANJO BOLT
2 - COPPER WASHER
3 - EXHAUST MANIFOLD GASKET
4 - COPPER WASHER
5 - EXHAUST MANIFOL HEAT SHIEL RETAINING BOLT
6 - TURBOCHARGER
7 - ENGINE LIFT HOOK
8 - ENGINE LIFT HOOK RETAINING BOLT
9 - SPACER
10 - EXHAUST MANIFOLD RETAINING NUT
11 - TURBOCHARGER OIL RETURN HOSE
12 - HOSE CLAMPS
13 - EXHAUST MANIFOLD STUDS
11a - 4 EXHAUST SYSTEM AND TURBOCHARGERRG
Page 2859 of 4284

(8) With exhaust manifold and turbocharger
assembly on work bench, remove turbocharger to
exhaust manifold retaining bolts. Separate exhaust
manifold and turbocharger.
CLEANING
All old gaskets should be inspected for any tears or
signs of prior leakage. If any gaskets show such indi-
cations, they should be replaced with new gaskets.
All gasket mating surfaces must be cleaned of old
gasket material to produce a smooth and dirt free
sealing surface for the new gasket.
INSTALLATION
(1) Connect exhaust manifold and turbocharger.
Torque nuts to 32.4N´m.
(2) Position new exhaust manifol gasket on
exhaust manifol studs (Fig. 6).
(3) Install exhaust manifold and turbocharger on
engine (Fig. 6). Torque nuts to 32.4N´m.
(4) Connect turbocharger oil supply and return
lines at turbocharger (Fig. 6). Torque oil supply line
to 24.5N´m.
(5) Install exhaust manifold shield (Fig. 6). Torque
bolts to 27.5N´m.
(6) Install engine lift hook (Fig. 6). Torque bolts to
32.4N´m.
(7) Install thermostat to upper radiator hose tube
and turbocharger outlet tube (Fig. 5).
(8) Install engine in vehicle (Refer to 9 - ENGINE
- INSTALLATION).
HEAT SHIELDS
REMOVAL
(1) Remove front wiper unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
REMOVAL).
(2) Remove engine cover (Refer to 9 - ENGINE -
REMOVAL).
(3) Partially drain cooling system (Refer to 7 -
COOLING/ENGINE/COOLANT - STANDARD PRO-
CEDURE).
(4) Remove thermostat housing to upper radiator
hose tube (Fig. 7).
(5) Remove exhaust manifold heat shield retaining
bolts and remove shield (Fig. 8).
Fig. 7 TURBOCHARGER AND COOLANT PIPES
1 - TURBOCHARGER OUTLET PIPE RETAINING BOLT
2 - TURBOCHARGER OUTLET PIPE
3 - ADAPTER HOSE
4 - HEAT SHIELD
5 - HOSE CLAMPS
6 - TURBOCHARGER INLET PIPE RETAINING BOLT
7 - TURBOCHARGER INLET PIPE
8 - ADAPTER HOSE
9 - HOSE CLAMPS
10 - CLAMP
11 - EGR VALVE TO INTAKE AIR INLET PIPE
12 - CLAMP
13 - THERMOSTAT HOUSING TO UPPER RADIATOR HOSE
PIPE
RGEXHAUST SYSTEM AND TURBOCHARGER11a-5
TURBOCHARGER (Continued)
Page 2860 of 4284
INSTALLATION
(1) Reposition exhaust heat shield (Fig. 8).
(2) Install exhaust heat shield retaining bolts (Fig.
8). Torque bolts to 27.5N´m.
(3) Install thermostat housing to upper radiator
hose tube (Fig. 7).
(4) Refill cooling system (Refer to 7 - COOLING/
ENGINE/COOLANT - STANDARD PROCEDURE).
(5) Install engine cover (Refer to 9 - ENGINE -
INSTALLATION).
(6) Install front wiper unit (Refer to 8 - ELECTRI-
CAL/WIPERS/WASHERS/WIPER MODULE -
INSTALLATION).
Fig. 8 EXHAUST MANIFOLD AND TURBOCHARGER
1 - TURBOCHARGER OIL SUPPLY BANJO BOLT
2 - COPPER WASHER
3 - EXHAUST MANIFOLD GASKET
4 - COPPER WASHER
5 - EXHAUST MANIFOL HEAT SHIEL RETAINING BOLT
6 - TURBOCHARGER
7 - ENGINE LIFT HOOK
8 - ENGINE LIFT HOOK RETAINING BOLT
9 - SPACER
10 - EXHAUST MANIFOLD RETAINING NUT
11 - TURBOCHARGER OIL RETURN HOSE
12 - HOSE CLAMPS
13 - EXHAUST MANIFOLD STUDS
11a - 6 EXHAUST SYSTEM AND TURBOCHARGERRG
HEAT SHIELDS (Continued)
Page 2861 of 4284

FRAMES & BUMPERS
TABLE OF CONTENTS
page page
BUMPERS
DESCRIPTION............................1
SPECIFICATIONS.........................1
FRONT FASCIA
REMOVAL...............................2
INSTALLATION............................2
FRONT BUMPER REINFORCEMENT
REMOVAL...............................2
INSTALLATION............................3
REAR FASCIA
REMOVAL...............................3
INSTALLATION............................3
REAR BUMPER REINFORCEMENT
REMOVAL...............................3INSTALLATION............................4
REAR FASCIA - SCUFF PAD
REMOVAL...............................4
INSTALLATION............................4
FRAME
DESCRIPTION............................4
SPECIFICATIONS.........................4
FRONT CRADLE CROSSMEMBER
DESCRIPTION............................9
REMOVAL..............................10
INSTALLATION...........................11
FRONT CROSSMEMBER MOUNT BUSHINGS
REMOVAL..............................11
INSTALLATION...........................11
BUMPERS
DESCRIPTION
BUMPERS
The bumpers are made up of bumper reinforce-
ment and fascia with air deflector (front bumper) and
mounting brackets.The bumper reinforcement is fastened to the unit-
ized body frame rails on the front and to the rail
extensions on the rear. The bumper fascia is fastened
to the body side sheet metal.
SPECIFICATIONS
TORQUE SPECIFICATIONS
DESCRIPTION N´m Ft. Lbs. In. Lbs.
Front bumper reinforcement attaching nut 54 40 Ð
Rear bumper reinforcement attaching nut 27 20 Ð
RSFRAMES & BUMPERS13-1
Page 2862 of 4284

FRONT FASCIA
REMOVAL
(1) Release hood latch and open hood.
(2) Remove the headlamp assemblies. Refer to
group 8 exterior lighting.
(3) Remove two bolts attaching the upper grill sup-
port to the headlamp mounting panel at each side of
the grille.
(4) Hoist vehicle and support with safety stands.
(5)
Remove front wheels. Refer to Group 22, Wheels
and Tires, for proper procedures and sequence.
(6) Remove front wheelhouse splash shields fasten-
ers as necessary to gain access to bolts holding front
fascia to fender. Refer to Group 23, Body, for proper
procedures.
(7) Remove the two bolts and two nuts holding fas-
cia to the front fenders (Fig. 1).
(8) Remove the five bolts holding bottom of fascia/
air dam to radiator closure panel.
(9) Disconnect fog lamp/parking and turn signal
lamp wire connector, as necessary.
(10) Remove bumper fascia from vehicle.
INSTALLATION
(1) Position front bumper fascia on vehicle.
(2) Lower vehicle.
(3) Install the two bolts to hold fascia to headlamp
mounting panel at each side of grille.(4) Raise vehicle.
(5) Install the two bolts and two nuts to hold fas-
cia to the front fenders (Fig. 1). The fascia should be
flush to fender.
(6) Install front wheelhouse splash shields fasten-
ers. Refer to Group 23, Body, for proper procedures.
(7) Install front wheels. Refer to Group 22, Wheels
and Tires, for proper procedures and tightening
sequence.
(8) Install the five bolts to hold bottom of fascia to
radiator closure panel.
(9) Lower the vehicle.
(10) Install the headlamp assemblies. Refer to sec-
tion 8 for installation.
FRONT BUMPER
REINFORCEMENT
REMOVAL
(1) Remove front bumper fascia. (Refer to 13 -
FRAMES & BUMPERS/BUMPERS/FRONT FASCIA
- REMOVAL)
(2) Support front bumper reinforcement on a suit-
able lifting device.
(3) Remove the four nuts holding front bumper
reinforcement to frame rail (Fig. 2).
(4) Remove front bumper reinforcement from vehicle.
Fig. 1 FRONT BUMPER FASCIA
1 - FRONT BUMPER FASCIA
2 - FRONT BUMPER REINFORCEMENT
3 - RADIATOR ENCLOSURE
Fig. 2 FRT BUMPER REINFORCEMENT
1 - FRONT BUMPER REINFORCEMENT
2 - FRAME RAILS
13 - 2 FRAMES & BUMPERSRS
Page 2863 of 4284

INSTALLATION
NOTE: Check position of the arrows molded into
the foam for correct orientation.
(1) Position front bumper reinforcement on vehicle.
(2) Install the four nuts to hold reinforcement to
frame rails. Tighten nuts to 54 N´m (40 ft. lbs.)
torque.
(3) Install front fascia. (Refer to 13 - FRAMES &
BUMPERS/BUMPERS/FRONT FASCIA - INSTAL-
LATION)
REAR FASCIA
REMOVAL
(1) Open liftgate.
(2) Remove the two screws attaching the upper
fascia to the body.
(3) Hoist and support vehicle on safety stands.
(4) Remove the six screws holding rear fascia to
rear fascia brackets (Fig. 3).
(5) Remove the four plastic rivets holding bottom
of rear fascia to bumper reinforcement.
(6) Remove rear fascia from vehicle.
INSTALLATION
(1) Position rear fascia on vehicle.
(2) Engage fascia under liftgate to the fascia sup-
port.
(3) Engage top sides of fascia to top of the rear fas-
cia brackets.
NOTE: Verify fascia is still engaged under the lift-
gate. Ensure acceptable and consistent gap
between liftgate and fascia.
(4) Install the six screws holding rear fascia to
rear fascia brackets.
(5) Install the four plastic rivets to hold bottom of
rear fascia to bumper reinforcement.
(6) Lower vehicle.
REAR BUMPER
REINFORCEMENT
REMOVAL
(1) Remove rear bumper fascia. (Refer to 13 -
FRAMES & BUMPERS/BUMPERS/REAR FASCIA -
REMOVAL)
(2) Support rear bumper reinforcement on a suit-
able lifting device.
(3) Remove the six nuts holding rear bumper rein-
forcement to frame rail extensions (Fig. 4).
(4)
Remove rear bumper reinforcement from vehicle.
Fig. 3 REAR BUMPER FASCIA
1 - REAR FASCIA
2 - PUSH PINS
3 - REAR BUMPER REINFORCEMENT
4 - REAR FASCIA BRACKET
Fig. 4 REAR BUMPER REINFORCEMENT
1 - REAR BUMPER REINFORCEMENT
2 - FRAME RAIL EXTENSIONS
3 - NUTS
RSFRAMES & BUMPERS13-3
FRONT BUMPER REINFORCEMENT (Continued)
Page 2864 of 4284

INSTALLATION
(1) Position rear bumper reinforcement on vehicle.
(2) Install the six nuts to hold rear bumper rein-
forcement to frame rail extensions and tighten to 27
N´m (20 ft. lbs.) (Fig. 4).
(3) Install rear bumper fascia. (Refer to 13 -
FRAMES & BUMPERS/BUMPERS/REAR FASCIA -
INSTALLATION)
REAR FASCIA - SCUFF PAD
REMOVAL
The scuff pad may not be salvageable during the
removal process. The scuff pad should be replaced if
damaged or broken. Check availability before servic-
ing.
(1) Remove rear bumper fascia.(Refer to 13 -
FRAMES & BUMPERS/BUMPERS/REAR FASCIA -
REMOVAL)
(2) Using a trim stick, pry up the rear edge of the
scuff pad to release tabs from the rear bumper fascia
and pull scuff pad up to release the forward tabs
(Fig. 5).
INSTALLATION
(1) Verify that there are fifteen slots in the fascia.
(2) Place scuff pad in position.
(3) Align and insert the center forward tab.
(4) Align the remaining tabs and press into the
slots, starting in the center and working outboard.
(5) Assure all tabs are fully engaged into the fas-
cia.
FRAME
DESCRIPTION
The vehicle does not have a conventional frame. It
is constructed as a unitized body and frame. The uni-
body is constructed from special high strength steel
and coated metals. This process reduces weight and
provides strength to withstand the forces applied
against structural members. The structural members
provide a unibody that has great structural strength.
SPECIFICATIONS
FRAME DIMENSIONS
Frame dimensions are listed in metric scale. All
dimensions are from center to center of Principal
Locating Point (PLP), or from center to center of PLP
and fastener location.
VEHICLE PREPARATION
Position the vehicle on a frame alignment rack,
refer to instructions provided with equipment being
used. Adjust the vehicle PLP heights to the specified
dimension above the work surface (datum line). Ver-
tical dimensions can be taken from the datum line to
the locations indicated were applicable. Refer to (Fig.
6), (Fig. 7), (Fig. 8), and (Fig. 9) for proper dimen-
sions.
Fig. 5 Scuff Pad
1 - SCUFF PAD
2 - TABS
13 - 4 FRAMES & BUMPERSRS
REAR BUMPER REINFORCEMENT (Continued)