Ins INFINITI QX56 2004 Factory Service Manual

EM-106Revision: August 2007
SERVICE DATA AND SPECIFICATIONS (SDS)
2004 QX56
*: After installing in connecting rod
CRANKSHAFT
Unit: mm (in) Side clearance 0.20 - 0.40 (0.0079 - 0.0157) 0.40 (0.0157)
Connecting rod bearing housingGrade No. 0
Grade No. 1
Grade No. 2
Grade No. 3
Grade No. 4
Grade No. 5
Grade No. 6
Grade No. 7
Grade No. 8
Grade No. 9
Grade No. A
Grade No. B
Grade No. C57.000 - 57.001 (2.2441 - 2.2441)
57.001 - 57.002 (2.2441 - 2.2442)
57.002 - 57.003 (2.2442 - 2.2442)
57.003 - 57.004 (2.2442 - 2.2443)
57.004 - 57.005 (2.2443 - 2.2443)
57.005 - 57.006 (2.2443 - 2.2443)
57.006 - 57.007 (2.2443 - 2.2444)
57.007 - 57.008 (2.2444 - 2.2444)
57.008 - 57.009 (2.2444 - 2.2444)
57.009 - 57.010 (2.2444 - 2.2445)
57.010 - 57.011 (2.2445 - 2.2445)
57.011 - 57.012 (2.2445 - 2.2446)
57.012 - 57.013 (2.2446 - 2.2446)
Main journal dia. “Dm” grade (No. 1 and 5) StandardGrade No. G
Grade No. H
Grade No. J
Grade No. K
Grade No. L
Grade No. M
Grade No. N
Grade No. P
Grade No. R
Grade No. S
Grade No. T
Grade No. U
Grade No. V
Grade No. W
Grade No. X
Grade No. Y
Grade No. 1
Grade No. 2
Grade No. 3
Grade No. 4
Grade No. 5
Grade No. 6
Grade No. 7
Grade No. 963.963 - 63.964 (2.5182 - 2.5183)
63.962 - 63.963 (2.5182 - 2.5182)
63.961 - 63.962 (2.5181 - 2.5182)
63.960 - 63.961 (2.5181 - 2.5181)
63.959 - 63.960 (2.5181 - 2.5181)
63.958 - 63.959 (2.5180 - 2.5181)
63.957 - 63.958 (2.5180 - 2.5180)
63.956 - 63.957 (2.5179 - 2.5180)
63.955 - 63.956 (2.5179 - 2.5179)
63.954 - 63.955 (2.5179 - 2.5179)
63.953 - 63.954 (2.5178 - 2.5179)
63.952 - 63.953 (2.5178 - 2.5178)
63.951 - 63.952 (2.5178 - 2.5178)
63.950 - 63.951 (2.5177 - 2.5178)
63.949 - 63.950 (2.5177 - 2.5177)
63.948 - 63.949 (2.5176 - 2.5177)
63.947 - 63.948 (2.5176 - 2.5176)
63.946 - 63.947 (2.5176 - 2.5176)
63.945 - 63.946 (2.5175 - 2.5176)
63.944 - 63.945 (2.5175 - 2.5175)
63.943 - 63.944 (2.5174 - 2.5175)
63.942 - 63.943 (2.5174 - 2.5174)
63.941 - 63.942 (2.5174 - 2.5174)
63.940 - 63.941 (2.5173 - 2.5174)
SEM645PBIC1686E

EX-1
EXHAUST SYSTEM
B ENGINE
CONTENTS
C
D
E
F
G
H
I
J
K
L
M
SECTION EX
A
EX
Revision: August 20072004 QX56 PREPARATION ........................................................... 2
Special Service Tool ................................................. 2
Commercial Service Tools ........................................ 2
EXHAUST SYSTEM ................................................... 3Checking Exhaust System ........................................ 3
Removal and Installation .......................................... 3
REMOVAL ............................................................. 4
INSTALLATION ..................................................... 4
INSPECTION AFTER INSTALLATION .................. 4

EX-2Revision: August 2007
PREPARATION
2004 QX56
PREPARATIONPFP:00002
Special Service ToolEBS00IKS
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsEBS00IKT
Tool number
(Kent-Moore No.)
Tool nameDescription
KV10114400
(J-38365)
Heated oxygen sensor wrenchLoosening or tightening heated oxygen sen-
sors:
a: 22 mm (0.87 in)
S-NT636
(Kent-Moore No.)
Tool nameDescription
a: (J-43897-18)
b: (J-43897-12)
Oxygen sensor thread cleanerReconditioning the exhaust system threads
before installing a new heated oxygen sensor
(Use with anti-seize lubricant shown below):
a: J-43897-18 (18 mm, 0.71 in) dia. for zirco-
nia oxygen sensor
b: J-43897-12 (12 mm, 0.47 in) dia. for tita-
nia oxygen sensor
Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL specifica-
tion MIL-A-907)Lubricating oxygen sensor thread cleaning
tool when reconditioning exhaust system
threads
Power toolLoosening nuts and bolts
AEM488
AEM489
PBIC0190E

EXHAUST SYSTEM
EX-3
C
D
E
F
G
H
I
J
K
L
MA
EX
Revision: August 20072004 QX56
EXHAUST SYSTEMPFP:20100
Checking Exhaust SystemEBS00IKU
Check exhaust pipes, muffler and mounting for improper attachment, leaks, cracks, damage or deterioration.

If anything is found, repair or replace damaged parts.
Removal and InstallationEBS00IKV
Exhaust System
CAUTION:

Be sure to use genuine exhaust system parts or equivalents which are specially designed for heat
resistance, corrosion resistance, and shape.

Perform the operation with the exhaust system fully cooled. The system will be hot just after the
engine stops.

Be careful not to cut your hand on the heat insulator edge.
SM A211 A
WBIA0416E
1. Tailpipe hanger bracket 2. Tailpipe 3. Gasket
4. Main muffler 5. Right front exhaust tube 6. Ring gasket
7. Heated oxygen sensor 2 (bank 2) 8. Heated oxygen sensor 2 (bank 1) 9. Left front exhaust tube
10. Center exhaust tube 11. Muffler hanger bracket front 12. Muffler hanger bracket rear

EX-4Revision: August 2007
EXHAUST SYSTEM
2004 QX56
REMOVAL
Remove exhaust system components using power tool.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:

Always replace exhaust gaskets with new ones when reassembling.

Before installing a new heated oxygen sensor, clean and lube the exhaust tube threads using tool.

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; install a new one.

Do not over-torque the heated oxygen sensor. Doing so may damage the heated oxygen sensor,
resulting in the MIL coming on.

If any mounting insulator is badly deformed, repair or replace it. If deposits such as mud pile up on
the mounting insulators, clean and inspect them.

Temporarily tighten the mounting nuts on the exhaust manifold side and the mounting bolts on the
vehicle side. Check each part for interference with other components, and then tighten the nuts
and bolts to specification.
INSPECTION AFTER INSTALLATION

With the engine running, check exhaust tube joints for gas leakage and unusual noises.

Check to ensure that mounting brackets and mounting rubbers are installed properly and free from undue
stress. Improper installation could result in excessive noise and vibration. Tool number
A : — (J-43897-18)
B : — (J-43897-12)

FAX-1
FRONT AXLE
D DRIVELINE/AXLE
CONTENTS
C
E
F
G
H
I
J
K
L
M
SECTION FA X
A
B
FA X
Revision: August 20072004 QX56 PRECAUTIONS .......................................................... 2
Precautions .............................................................. 2
PREPARATION ........................................................... 3
Special Service Tools ............................................... 3
Commercial Service Tools ........................................ 3
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 4
NVH Troubleshooting Chart ..................................... 4
WHEEL HUB .............................................................. 5
On-Vehicle Inspection and Service .......................... 5
WHEEL BEARING INSPECTION ......................... 5
Removal and Installation .......................................... 5
REMOVAL ............................................................. 5
INSPECTION AFTER REMOVAL ......................... 6
INSTALLATION ..................................................... 6DRIVE SHAFT ............................................................. 7
Removal and Installation .......................................... 7
REMOVAL ............................................................. 7
INSPECTION AFTER REMOVAL ......................... 7
INSTALLATION ..................................................... 8
Disassembly and Assembly ...................................... 8
DISASSEMBLY ..................................................... 8
INSPECTION AFTER DISASSEMBLY .................. 9
ASSEMBLY ......................................................... 10
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 13
Wheel Bearing ........................................................ 13
Drive Shaft .............................................................. 13

FAX-4
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS001AI
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FAX -1 3FA X - 7FA X - 5FA X - 5FA X - 7FA X - 5
PR-3, "
NVH Troubleshooting Chart
"
FFD-7, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
Wheel bearing damage
PROPELLER SHAFT
FRONT FINAL DRIVE
SUSPENSION
TIRES
ROAD WHEEL
BRAKES
STEERING
SymptomNoise×× ×× ×××××××
Shake× ××× × ×××××
Vibration××××× × ×× ×
Shimmy× ×× ×××××
Shudder×××× ×××××
Poor quality ride or
handling××× ×××

WHEEL HUB
FAX-5
C
E
F
G
H
I
J
K
L
MA
B
FA X
Revision: August 20072004 QX56
WHEEL HUBPFP:43202
On-Vehicle Inspection and ServiceEDS001AJ
Make sure the mounting conditions (looseness, backlash) of each component and component status (wear,
damage) are normal.
WHEEL BEARING INSPECTION

Move wheel hub in the axial direction by hand. Make sure there
is no looseness of wheel bearing.

Rotate wheel hub and make sure there is no unusual noise or
other irregular conditions. If there are any irregular conditions,
replace wheel hub and bearing assembly.
Removal and InstallationEDS001AK
REMOVAL
1. Remove wheel and tire using power tool.
2. Remove engine under cover using power tool.
3. Without disassembling the hydraulic lines, remove caliper torque member bolts using power tool. Then
reposition brake caliper aside with wire. Refer to BR-22, "
Removal and Installation of Brake Caliper and
Disc Rotor" .
NOTE:
Do not press brake pedal while brake caliper is removed.Axial end play limit : 0.05 mm (0.002 in) or less
SM A57 1A
1. Disc rotor 2. Wheel hub and bearing assembly 3. Wheel stud
4. Splash guard 5. Steering knuckle
WDIA0043E

FAX-6
WHEEL HUB
Revision: August 20072004 QX56
4. Put alignment mark on disc rotor and wheel hub and bearing
assembly, then remove disc rotor.
5. Remove cotter pin, then remove lock nut from drive shaft using power tool. Refer to FA X -7 , "
Removal and
Installation" .
6. Remove drive shaft from wheel hub and bearing assembly. Refer to FAX-7, "
Removal and Installation" .
7. Remove wheel sensor. Refer to BRC-64, "
Removal and Installation" .

Inspect the wheel sensor O-ring, replace the wheel sensor assembly if damaged.

Clean the wheel sensor hole and mounting surface with a suitable brake cleaner and clean lint-free
shop rag. Be careful that dirt and debris do not enter the axle bearing area.

Apply a coat of suitable grease to the wheel sensor O-ring and mounting hole.
CAUTION:
Do not pull on the wheel sensor harness.
8. Remove wheel hub and bearing assembly bolts using power tool.
9. Remove splash guard and wheel hub and bearing assembly from steering knuckle.
INSPECTION AFTER REMOVAL
Check for deformity, cracks and damage on each part, replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.

Use new bolts when installing the wheel hub and bearing assembly.

When installing disc rotor on wheel hub and bearing assembly,
position the disc rotor according to alignment mark.
(When not using the alignment mark, refer to BR-22, "
Removal
and Installation of Brake Caliper and Disc Rotor" .)

When installing wheel and tire. Refer to WT-6, "Rotation" .
WDIA0044E
WDIA0044E

DRIVE SHAFT
FAX-7
C
E
F
G
H
I
J
K
L
MA
B
FA X
Revision: August 20072004 QX56
DRIVE SHAFTPFP:39100
Removal and InstallationEDS001B5
REMOVAL
1. Remove wheel and tire using power tool.
2. Remove engine under cover using power tool.
3. Remove wheel sensor harness from mount on knuckle.
CAUTION:
Do not pull on wheel sensor harness.
4. Without disassembling the hydraulic lines, remove brake caliper using power tool. Reposition it aside with
wire. Refer to BR-22, "
Removal and Installation of Brake Caliper and Disc Rotor" .
NOTE:
Avoid depressing brake pedal while brake caliper is removed.
5. Remove coil spring and shock absorber assembly using power tool. Refer to FSU-10, "
Removal and
Installation" .
6. Separate upper link ball joint stud from steering knuckle using
Tool.

Support lower link with jack.
7. Remove cotter pin, then remove drive shaft nut.
8. Remove drive shaft mounting bolts from front final drive.
9. Remove drive shaft from wheel hub and bearing assembly.
CAUTION:

When removing drive shaft, do not apply an excessive
angle to drive shaft joint. Also be careful not to exces-
sively extend slide joint.
INSPECTION AFTER REMOVAL

Move joint up, down, left, right, and in axial direction. Check for any rough movement or significant loose-
ness.

Check boot for cracks or other damage, and for grease leakage.

If damaged, disassemble drive shaft to verify damage, and
repair or replace as necessary.
1. Cotter pin 2. Drive shaft nut 3. Drive shaft
LDIA0159E
Tool number : ST29020001 (J-24319-01)
LEIA0095E
RAA0030D