torque INFINITI QX4 2005 Factory Service Manual

CYLINDER BLOCK
EM-97
C
D
E
F
G
H
I
J
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MA
EM
Revision: October 20052005 QX56
Method of Using Plastigage

Remove oil and dust on the crankshaft journal and surfaces of
each bearing completely.

Cut a plastigage slightly shorter than the bearing width, and
place it in crankshaft axial direction, avoiding oil holes.

Install the main bearings to the cylinder block and main bearing
cap, and tighten the main bearing bolts to the specified torque.
CAUTION:
Do not rotate crankshaft with plastigage installed.

Remove bearing cap and bearings. Measure plastigage width
using the scale on the plastigage bag.
NOTE:
The procedure when the measured value exceeds the repair limit is the same as that described in
“Method of Measurement”.
CRUSH HEIGHT OF MAIN BEARING

When the bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of the
bearing must protrude. Refer to EM-77, "
ASSEMBLY" for the
tightening procedure.

If standard is not met, replace main bearings.
CRUSH HEIGHT OF CONNECTING ROD BEARING

When connecting rod bearing cap is removed after being tight-
ened to the specified torque with the connecting rod bearings
installed, the tip end of the bearing must protrude. Refer to EM-
77, "ASSEMBLY" for the tightening procedure.

If standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT DIAMETER

Check for bolts (M9 and M12) installed from lower side using the
following procedure.
NOTE:

Side bolt (M10) is outside the target.

Figure shows M12 bolt.

Measure bolt diameter "d1" from tip of the bolt to dimension "a".

Measure bolt diameter "d"2 from the dimension between tip of
the bolt and dimension "b" as base station to dimension "c".
NOTE:
If a narrower part in the threads is determined by visual check,
measure ″d2″ at that point.

Calculate the difference between "d1" and "d2".
KBIA2551E
Standard : There must be crush height
SEM 50 2G
Standard : There must be crush height.
PBIC1646E
KBIA2497E

EX-4Revision: October 2005
EXHAUST SYSTEM
2005 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; replace with 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 nuts on the exhaust manifold side and the bolts on the vehicle side. Check
each part for interference with other components, and then tighten the nuts and bolts to specifica-
tion.
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)

WHEEL HUB
FAX-5
C
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G
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FA X
Revision: October 20052005 QX56
WHEEL HUBPFP:43202
On-Vehicle Inspection and ServiceEDS001XD
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 InstallationEDS001XE
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-21, "
REMOVAL" .
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

FFD-2
PRECAUTIONS
Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EDS003PC
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WAR NIN G:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
PrecautionsEDS003PD
CAUTION:

Before starting diagnosis of the vehicle, understand symptoms well. Perform correct and system-
atic operations.

Check for the correct installation status prior removal or disassembly. When matching marks are
required, be sure they do not interfere with the function of the parts they are applied to.

Carry out an overhaul in a clean work place, Using a dust proof room is recommended.

Before disassembly, using steam or white gasoline, completely remove sand and mud from the
exterior the unit, preventing them from entering into the unit during disassembly or assembly.

Check appearance of the disassembled parts for damage, deformation, and abnormal wear. If a
malfunction is detected, replace it with a new one.

Normally replace lock pins, oil seals, and bearings with new ones every times they are removed.

In principle, tighten bolts or nuts gradually in several steps working diagonally from inside to out-
side. If tightening sequence is specified, observe it.

Clean and flush the parts sufficiently and blow them dry.

Be careful not to damage the sliding surfaces and mating surface.

When applying sealant, remove the old sealant from the mounting surface; then remove any mois-
ture, oil, and foreign materials from the application and mounting surfaces.

Always use shop paper for cleaning the inside of components.

Avoid using cotton gloves or a shop cloth to prevent entering of lint.

During assembly, observe the specified tightening torque, and new differential gear oil, Vaseline,
or multi-purpose grease, as specified for each vehicle, when necessary.

FFD-4
PREPARATION
Revision: October 20052005 QX56
ST33081000
(—)
AdapterRemoving and installing side bearing inner
race.
a: 33.5 mm (1.32 in) dia.
b: 43 mm (1.69 in) dia.
KV38108300
(6958)
Spanner wrenchRemoving and installing drive pinion nut.
ST3127S000
(J-25765-A)
Preload gauge
1: GG91030000
(J-25765)
Torque wrench
2: HT62940000
(—)
Socket adapter (1/2″)
3: HT62900000
(—)
Socket adapter (3/8″)Inspecting drive pinion bearing preload and to-
tal preload
—
(C-4040)
InstallerInstalling drive pinion rear bearing inner race.
KV40105230
(—)
DriftInstalling drive pinion rear bearing outer race.
a: 92 mm(3.62 in) dia.
b: 86 mm (3.39 in) dia.
—
(C-4171)
Handle

Removing drive pinion front bearing outer
race

Removing drive pinion rear bearing outer
race Tool number
(Kent-Moore No.)
Tool nameDescription
ZZA0881D
LBIA0457E
NT124
SDIA2607E
ZZA1141D
LDIA0134E

FFD-8
FRONT OIL SEAL
Revision: October 20052005 QX56
INSTALLATION
1. Apply multi-purpose grease to cavity at sealing lips of front oil
seal. Press front oil seal into gear carrier using suitable tool.
2. Install companion flange and a new drive pinion nut. Tighten
drive pinion nut while holding the companion flange using Tool
until there is no end play.
3. Measure the drive pinion bearing preload with front oil seal
resistance using Tool.
NOTE:

Drive pinion bearing preload should equal the measurement
taken during removal plus an additional 0.56 N·m (0.06 Kg-m,
5 in-lb).

If drive pinion bearing preload is low, tighten drive pinion nut in 6.8 N·m (0.69 Kg-m, 5ft-lb) increments
until drive pinion preload is met.
CAUTION:
Never loosen the drive pinion nut to decrease drive pinion bearing preload. Do not exceed speci-
fied preload. If preload torque is exceed a new collapsible spacer must be installed. If maximum
torque is reached prior to reaching the required preload, the collapsible spacer may have been
damaged. Replace the collapsible spacer.
4. Attach the RH and LH drive shafts. Refer to FAX-8, "
INSTALLATION" .
5. Install the front propeller shaft. Refer to PR-5, "
INSTALLATION" .
BDIA0003E
Tool number : KV38108300 (6958)
Tool number : ST3127S000 (J-25765-A)
Drive pinion nut : 298 - 678 N·m (31 - 69Kg-m, 220 - 500 ft-lb)
BDIA0001E

FFD-14
FRONT FINAL DRIVE ASSEMBLY
Revision: October 20052005 QX56
ASSEMBLY INSPECTION AND ADJUSTMENT

Before inspection and adjustment, drain gear oil.
Total Preload Torque
1. Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
2. Rotate drive pinion at least 20 times to check for smooth operation of the bearing.
3. Measure total preload with preload gauge.

If measured value is out of the specification, disassemble it to
check and adjust each part. Adjust the pinion bearing preload
and side bearing preload.
Adjust the pinion bearing preload first, then adjust the side bear-
ing preload.
34. Bushing 35. Bearing 36 Screw
37 Dowel pin
Tool number : ST3127S000
Total preload (with oil seal):
2.98 - 4.76 N·m (0.31 - 0.48 kg-m, 27 - 42 in-lb)
SDIA2220E
When the preload torque is large
On pinion bearings: Replace the collapsible spacer.
On side bearings: Loosen the side bearing adjust nuts at the same force on each side.
When the preload is small
On pinion bearings: Tighten the drive pinion nut.
On side bearings: Tighten the side bearing adjust nuts at the same force on each side.

FFD-26
FRONT FINAL DRIVE ASSEMBLY
Revision: October 20052005 QX56
b. Insert companion flange onto drive pinion. Tap the companion
flange with a soft hammer until fully seated.
c. Temporarily tighten removed drive pinon nut to drive pinion.
NOTE:
Use removed drive pinon nut only for the preload measurement.
d. Rotate drive pinion at least 20 times to check for smooth opera-
tion of the bearing.
e. Tighten to drive pinon nut, while adjust pinion bearing preload
torque.
CAUTION:

Adjust to the lower limit of the drive pinion nut tightening
torque first.

Drive pinon nut is tightened with no collapsible spacer. Be careful not to overtighten it. While
measuring the preload, tighten it by 5° to 10°.

After adjustment, rotate drive pinion back and forth 2 to 3 times to check for unusual noise, rota-
tion malfunction, and other malfunctions.
f. Install side bearing adjust nut into gear carrier.
g. Install differential case assembly with side bearing outer races
into gear carrier.
SDIA2266E
Tool number : KV38108300 (6958)
PDIA0182E
Tool number : ST3127S000
Drive pinion nut tightening torque:
298 - 678 N·m (31 - 69 kg-m, 220 - 500 ft-lb)
Pinion bearing preload:
2.3 - 3.4 N·m (24 - 34 kg-cm, 21 - 30 in-lb)
SDIA2220E
SPD5 27

FFD-28
FRONT FINAL DRIVE ASSEMBLY
Revision: October 20052005 QX56
13. Tighten to drive pinon nut, while adjust pinion bearing preload
torque.
CAUTION:

Adjust the lower limit of the drive pinion nut tightening
torque first.

If the preload torque exceeds the specified value, replace collapsible spacer and tighten it again
to adjust. Never loosen drive pinion nut to adjust the preload torque.

After adjustment, rotate drive pinion back and forth 2 to 3 times to check for unusual noise, rota-
tion malfunction, and other malfunctions.
14. Install differential case assembly. Refer to FFD-24, "
Drive Pinion Assembly" .
CAUTION:
Do not install rear cover yet.
15. Check and adjust tooth contact, drive gear to drive pinion backlash, and companion flange runout. Refer
to FFD-15, "
Tooth Contact" , FFD-16, "Backlash" , FFD-16, "Companion Flange Runout" .
Recheck above items. Readjust the above description, if necessary.
16. Check total preload torque. Refer to FFD-14, "
Total Preload Torque" .
17. Install rear cover. Refer to FFD-13, "
COMPONENTS" .
Differential Assembly
1. Apply gear oil to contact surfaces of each gear, thrust washers
and differential case.
2. Install the removed thrust washer or same thickness washer to
side gear.
3. Install the side gears, thrust washers, pinion mate gears and
thrust washers into differential case.Tool number : ST3127S000
Drive pinion nut tightening torque:
298 - 678 N·m (31 - 69 kg-m, 220 - 500 ft-lb)
Pinion bearing preload:
2.3 - 3.4 N·m (24 - 34 kg-cm, 21 - 30 in-lb)
SDIA2220E
SDIA0193J
SDIA2025E

FFD-30
FRONT FINAL DRIVE ASSEMBLY
Revision: October 20052005 QX56
11. Install side bearing adjust nut into gear carrier.
12. Install differential case assembly with side bearing outer races
into gear carrier.
13. Align mark on bearing cap with that on gear carrier and install
bearing cap on gear carrier.

Do not tighten at this step. This allows further tightening of
side bearing adjusters.
14. Tighten each side bearing adjust nuts alternately turning drive
gear.
15. Check and adjust tooth contact and drive gear to drive pinion
backlash. Refer to FFD-15, "
Tooth Contact" , FFD-16, "Back-
lash" .
Recheck above items. Readjust the above description, if neces-
sary.
16. After adjusting tooth contact and drive gear to drive pinion back-
lash, fix adjuster with screws and tighten cap bolt to the speci-
fied torque. Refer to FFD-13, "
COMPONENTS" .
17. Check total preload torque. Refer to FFD-14, "
Total Preload
To r q u e" .
18. Apply recommended sealant to mating surface of rear cover.
CAUTION:
Remove old sealant adhering to mounting surfaces. Also
remove any moisture, oil, or foreign material adhering to
application and mounting surfaces.
19. Install rear cover on gear carrier and tighten mounting bolts with
the specified torque. Refer to FFD-13, "
COMPONENTS" .
20. Apply multi-purpose grease to cavity at sealing lips of oil seal.
Install side oil seal.
SPD5 27
SDIA2258E
SDIA2265E
SDIA2263E
SDIA3204E