differential INFINITI QX56 2008 Factory Service Manual

2008
QUICK REFERENCE CHART: QX56
QUICK REFERENCE CHART: QX56
Engine Tune-up DataINFOID:0000000006237760
GENERAL SPECIFICATIONS
DRIVE BELTS
SPARK PLUG
Cylinder arrangementV- 8
Displacement cm
3(in3) 5,552 (338.80)
Bore and stroke mm (in) 98 x 92 (3.86 x 3.62)
Valve arrangement DOHC
Firing order 1-8-7-3-6-5-4-2
Number of piston rings Compression 2
Oil 1
Number of main bearings 5
Compression ratio 9.8:1
C o m p r e s s i o n p r e s s u r e k P a
(kg/cm
2, psi)/rpm Standard 1,520 (15.5, 220)/200
Minimum 1,324 (13.5, 192)/200
Differential limit between cylinders 98 (1.0, 14)/200
Cylinder number
Valve timing Unit: degree
abcde f
244 ° 232° -8° 60° 10° 54°
SEM957C
PBIC0187E
Tension of drive belts Auto adjustment by auto tensioner

BR-6
< FUNCTION DIAGNOSIS >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
FUNCTION DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000004894481
Use the chart below to help you find the cause of the sy mptom. If necessary, repair or replace these parts.
×: ApplicableReference page
BR-7
, BR-9
BR-7
, BR-9
BR-7
, BR-9
BR-7
, BR-9
BR-7
, BR-9
BR-7
, BR-9
BR-7
, BR-9
BR-7
, BR-9
BR-7
, BR-9
BR-7
, BR-9
DLN-182, "
NVH Troubleshooting Chart
" (2F1310),
DLN-192, "
NVH Troubleshooting Chart
" (2S1410)
DLN-206, "
NVH Troubleshooting Chart
" (FFD),
DLN-240, "
NVH Troubleshooting Chart
" (RFD)
FAX-5, "
NVH Troubleshooting Chart
" (FAX),
RAX-5, "
NVH Troubleshooting Chart
" (RAX)
FSU-6, "
NVH Troubleshooting Chart
" (FSU),
RSU-5, "
NVH Troubleshooting Chart
" (RSU)
WT-41, "
NVH Troubleshooting Chart
"
ST-12, "
NVH Troubleshooting Chart
"
Possible cause and
SUSPECTED PARTS
Pads - damaged
Pads - uneven wear
Shims damaged
Rotor imbalance
Rotor damage
Rotor runout
Rotor deformation
Rotor deflection
Rotor rust
Rotor thickness variation
PROPELLER SHAFT
DIFFERENTIAL
DRIVESHAFT
SUSPENSION
TIRES AND ROAD WHEEL
STEERING
Symptom Noise
××× × × × × ××
Shake ×× ××××
Shimmy, Shudder ××××××× × × ××
Revision: March 2010 2008 QX56

BRM-8
< SERVICE INFORMATION >
BODY REPAIR
FRAME COMPONENT PARTS
1. Front shock absorber bracket RH/LH
2. Front differential mounting bracket RH/LH
3. 1st cab mounting bracket RH/LH
4. Front side member extension assembly RH/LH
5. 1st crossmember assembly
LIIA1594E
Revision: March 20102008 QX56

DLN-4
Commercial Service Tool ......................................191
SYMPTOM DIAGNOSIS ............................192
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
192
NVH Troubleshooting Chart ................................ ..192
ON-VEHICLE REPAIR ...............................193
PROPELLER SHAFT ..................................... .193
On-Vehicle Service .............................................. ..193
REMOVAL AND INSTALLATION ..............194
PROPELLER SHAFT ..................................... .194
Removal and Installation ..................................... ..194
DISASSEMBLY AND ASSEMBLY ............197
PROPELLER SHAFT ..................................... .197
Disassembly and Assembly ................................. ..197
SERVICE DATA AND SPECIFICATIONS
(SDS) ........................................................ ..
199
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
199
General Specification .......................................... ..199
Snap Ring ..............................................................200
FRONT FINAL DRIVE: M205
PRECAUTION .............. ..............................
201
PRECAUTIONS .............................................. .201
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ..
201
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
201
Precaution for Servicing Front Final Drive .............202
PREPARATION ..........................................203
PREPARATION .............................................. .203
Special Service Tool ............................................ ..203
Commercial Service Tool ......................................205
SYMPTOM DIAGNOSIS ............................206
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
206
NVH Troubleshooting Chart ................................ ..206
ON-VEHICLE MAINTENANCE ..................207
DIFFERENTIAL GEAR OIL ............................ .207
Changing Differential Gear Oil ...............................207
Checking Differential Gear Oil ............................. ..207
ON-VEHICLE REPAIR ...............................208
SIDE OIL SEAL .............................................. ..208
Removal and Installation .......................................208
FRONT OIL SEAL ............................................209
Removal and Installation .......................................209
CARRIER COVER .......................................... ..211
Removal and Installation .......................................211
REMOVAL AND INSTALLA TION .............212
FRONT FINAL DRIVE .................................... ..212
Removal and Installation .......................................212
DISASSEMBLY AND ASSEMBLY ...........214
FRONT FINAL DRIVE .................................... ..214
Disassembly and Assembly ................................. .214
SERVICE DATA AND SPECIFICATIONS
(SDS) ........ .................................................
231
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
231
General Specification ........................................... .231
Inspection and Adjustment ....................................231
REAR FINAL DRIVE: R230
PRECAUTION ............... ............................
233
PRECAUTIONS .............................................. ..233
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
233
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
233
Precaution for Servicing Rear Final Drive .............234
PREPARATION .........................................235
PREPARATION .............................................. ..235
Special Service Tool ............................................ .235
Commercial Service Tool ......................................239
SYMPTOM DIAGNOSIS ...........................240
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
240
NVH Troubleshooting Chart ..................................240
DESCRIPTION ................................................ ..241
Cross-Sectional View ........................................... .241
ON-VEHICLE MAINTENANCE .................242
DIFFERENTIAL GEAR OIL ..............................242
Changing Differential Gear Oil ............................. .242
Checking Differential Gear Oil ..............................242
ON-VEHICLE REPAIR ..............................243
FRONT OIL SEAL ............................................243
Revision: March 2010 2008 QX56

DLN-182
< SYMPTOM DIAGNOSIS >[PROPELLER SHAFT: 2F1310]
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000001604426
Use the chart below to help you find the cause of the sy mptom. If necessary, repair or replace these parts.
×: ApplicableReference page
DLN-183, "
On-Vehicle Service
"
DLN-183, "
On-Vehicle Service
"
DLN-183, "
On-Vehicle Service
"
DLN-240, "
NVH Troubleshooting Chart
"
RAX-5, "
NVH Troubleshooting Chart
"
RSU-5, "
NVH Troubleshooting Chart
"
WT-41, "
NVH Troubleshooting Chart
"
WT-41, "
NVH Troubleshooting Chart
"
RAX-10, "
Removal and Installation
"
BR-6, "
NVH Troubleshooting Chart
"
ST-12, "
NVH Troubleshooting Chart
"
Possible cause and suspected parts
Uneven rotation torque
Rotation imbalance
Excessive run out
Differential
Axle
Suspension
Tires
Road wheel
Drive shaft
Brakes
Steering
Symptom Noise
×××××××××××
Shake ×××××××
Vibration ××××××××
Revision: March 2010 2008 QX56

DLN-192
< SYMPTOM DIAGNOSIS >[PROPELLER SHAFT: 2S1410]
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000001604433
Use the chart below to help you find the cause of the sy mptom. If necessary, repair or replace these parts.
×: ApplicableReference page
DLN-193, "
On-Vehicle Service
"
DLN-193, "
On-Vehicle Service
"
DLN-193, "
On-Vehicle Service
"
DLN-240, "
NVH Troubleshooting Chart
"
RAX-5, "
NVH Troubleshooting Chart
"
RSU-5, "
NVH Troubleshooting Chart
"
WT-41, "
NVH Troubleshooting Chart
"
WT-41, "
NVH Troubleshooting Chart
"
RAX-5, "
NVH Troubleshooting Chart
"
BR-6, "
NVH Troubleshooting Chart
"
ST-12, "
NVH Troubleshooting Chart
"
Possible cause and suspected parts
Uneven rotation torque
Rotation imbalance
Excessive run out
Differential
Axle
Suspension
Tires
Road wheel
Drive shaft
Brakes
Steering
Symptom Noise
×××××××××××
Shake ×××××××
Vibration ××××××××
Revision: March 2010 2008 QX56

DLN-202
< PRECAUTION >[FRONT FINAL DRIVE: M205]
PRECAUTIONS
5. When the repair work is completed, return the ignition switch to the
″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of a ll control units using CONSULT-III.
Precaution for Servicing Front Final DriveINFOID:0000000001604439
• Before starting diagnosis of the vehicle, understand the symptoms well. Perform correct and systematic
operations.
• Check for the correct installation status prior to re moval or disassembly. When matching marks are required,
be certain they do not interfere with the function of the parts they are applied to.
• Overhaul should be done in a clean work area, a dust proof area is recommended.
• Before disassembly, completely remove sand and mud from the exterior of the unit, preventing them from
entering into the unit during disassembly or assembly.
• Always use shop paper for cleaning the inside of components.
• Avoid using cotton gloves or a shop cloth to prevent the entering of lint.
• Check appearance of the disassembled parts for dam age, deformation, and abnormal wear. Replace them
with new ones if necessary.
• Gaskets, seals and O-rings should be replaced any time the unit is disassembled.
• Clean and flush the parts sufficiently and blow them dry.
• Be careful not to damage sliding surfaces and mating surfaces.
• When applying sealant, remove the old sealant from the mating surface; then remove any moisture, oil, and
foreign materials from the application and mating surfaces.
• In principle, tighten nuts or bolts gradually in severa l steps working diagonally from inside to outside. If a
tightening sequence is specified, observe it.
• During assembly, observe the specified tightening torque.
• Add new differential gear oil, petroleum jelly, or multi-purpose grease, as specified.
Revision: March 2010 2008 QX56

DLN-206
< SYMPTOM DIAGNOSIS >[FRONT FINAL DRIVE: M205]
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000001604442
Use the chart below to help you find the cause of the sy mptom. If necessary, repair or replace these parts.
×: ApplicableReference page
DLN-214, "
Disassembly and Assembly
"
DLN-214, "
Disassembly and Assembly
"
DLN-214, "
Disassembly and Assembly
"
DLN-214, "
Disassembly and Assembly
"
DLN-214, "
Disassembly and Assembly
"
DLN-207, "
Changing Differential Gear Oil
"
DLN-182, "
NVH Troubleshooting Chart
"
FAX-5, "
NVH Troubleshooting Chart
"
FSU-6, "
NVH Troubleshooting Chart
"
WT-41, "
NVH Troubleshooting Chart
"
WT-41, "
NVH Troubleshooting Chart
"
FAX-5, "
NVH Troubleshooting Chart
"
BR-6, "
NVH Troubleshooting Chart
"
ST-12, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Gear tooth rough
Gear contact improper
Tooth surfaces worn
Incorrect backlash
Companion flange excessive runout
Gear oil improper
PROPELLER SHAFT
FRONT AXLE
FRONT SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
STEERING
Symptom
Noise××××××××××××××
Revision: March 2010 2008 QX56

DIFFERENTIAL GEAR OILDLN-207
< ON-VEHICLE MAINTENANCE > [FRONT FINAL DRIVE: M205]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
ON-VEHICLE MAINTENANCE
DIFFERENTIAL GEAR OIL
Changing Differential Gear OilINFOID:0000000001604443
DRAINING
1. Stop the engine.
2. Remove the drain plug from the front final drive assembly to drain the differential gear oil.
3. Install the drain plug with sealant applied on the thr eads to the front final drive assembly. Tighten to the
specified torque. Refer to DLN-214, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Prod-
ucts and Sealants".
FILLING
1. Remove the filler plug from the front final drive assembly.
2. Fill the front final drive assembly with new differential gear oil
until the level reaches the specified level near the filler plug hole.
3. Install the filler plug with sealant applied on the threads to the front final drive assembly. Tighten to the specified torque. Refer
to DLN-214, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Products and Sealants".
Checking Differential Gear OilINFOID:0000000001604444
DIFFERENTIAL GEAR OIL LEAKAGE AND LEVEL
1. Make sure that differential gear oil is not leaking from the front final drive assembly or around it.
2. Check the differential gear oil level from the filler plug hole as
shown.
CAUTION:
Do not start engine while checki ng differential gear oil level.
3. Install the filler plug with sealant applied on the threads to the front final drive assembly. Tighten to the specified torque. Refer
to DLN-214, "
Disassembly and Assembly".
• Use High Performance Thread Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Products and Sealants".
Differential gear oil
grade and capacity
: Refer to
MA-12, "
Fluids
and Lubricants".
LDIA0176E
LDIA0176E
Revision: March 2010 2008 QX56

DLN-208
< ON-VEHICLE REPAIR >[FRONT FINAL DRIVE: M205]
SIDE OIL SEAL
ON-VEHICLE REPAIR
SIDE OIL SEAL
Removal and InstallationINFOID:0000000001604445
REMOVAL
1. Remove the front final drive assembly. Refer to
DLN-212, "Removal and Installation".
2. Remove the differential side shaft and differential side flange using suitable tool.
3. Place a small hole in the side oil seal case using suitable tool.
4. Remove the side oil seal using suitable tool as shown.
INSTALLATION
1. Apply multi-purpose grease to the lips of the new side oil seal. Then drive the new side oil seal in evenly to
the gear carrier using suitable tool.
CAUTION:
• Do not reuse side oil seal.
• Do not incline the new side oil seal when installing.
• Apply multi-purpose grease to the lips of the new side oil seal.
2. Installation of the remaining components is in the reverse order of removal. CAUTION:
Check the differential gear oil level after installation. Refer to DLN-207, "
Checking Differential Gear
Oil".
BDIA0006E
LDIA0129E
LDIA0130E
Revision: March 2010 2008 QX56