2008 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2008 Factory Service Manual FSU-4
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000001534618
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated h

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INFINITI QX56 2008 Factory Service Manual PREPARATIONFSU-5
< PREPARATION >
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Spring compressor Removing and installing coil spring
Power tool Loosening bolts and nuts
Tool name
Description
NT717
PBIC0190E
Revisi

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INFINITI QX56 2008 Factory Service Manual FSU-6
< SYMPTOM DIAGNOSIS >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000001534620

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INFINITI QX56 2008 Factory Service Manual ON-VEHICLE SERVICEFSU-7
< ON-VEHICLE MAINTENANCE >
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ON-VEHICLE MAINTENANCE
ON-VEHICLE SERVICE
Front Suspension PartsINFOID:0000000001534627
Check front suspension parts

ON-VEHICLE SERVICEFSU-7
< ON-VEHICLE MAINTENANCE >
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ON-VEHICLE MAINTENANCE
ON-VEHICLE SERVICE
Front Suspension PartsINFOID:0000000001534627
Check front suspension parts for excessive play, cracks, wear and
other damage.
• Shake each front wheel to check for excessive play. If looseness is noted, inspect wheel bearing end play, then check
ball joint end play. Refer to FA X - 6 , "
On-Vehicle Inspection and Ser-
vice" and FSU-7, "Front Suspension Parts".
• Make sure that the cotter pin is inserted (4WD only).
• Retighten all nuts and bolts to the specified torque.
• Check shock absorber for oil leakage and other damage.
• Check suspension ball joint for grease leakage and ball joint dust cover for cracks and other damage.
Front Wheel AlignmentINFOID:0000000004915023
PRELIMINARY INSPECTION
WARNING:
Always adjust the alignment with the vehicle on a flat surface.
NOTE:
If alignment is out of specificat ion, inspect and replace any damaged or worn suspension parts before making
any adjustments.
1. Check and adjust the wheel alignment with the vehicle under unladen conditions. “Unladen conditions”
means that the fuel, coolant, and lubricant are full; and that the spare tire, jack, hand tools and mats are in
their designated positions.
2. Check the tires for incorrect air pressure and excessive wear.
3. Check the wheels for run out and damage. Refer to WT-45, "
Inspection".
4. Check the wheel bearing axial end play. Refer to FAX-6, "
On-Vehicle Inspection and Service" .
5. Check the shock absorbers for leaks or damage.
6. Check each mounting point of the suspension components for any excessive looseness or damage.
7. Check each link, arm, and the rear suspension member for any damage.
8. Check the vehicle height. Refer to FSU-25, "
Wheelarch Height (Unladen*1)" .
GENERAL INFORMATION AND RECOMMENDATIONS
1. A Four-Wheel Thrust Alignment should be performed.
• This type of alignment is re commended for any NISSAN vehicle.
• The four-wheel “thrust” process helps ensure that the vehicle is properly aligned and the steering wheel
is centered.
• The alignment machine itself should be ca pable of accepting any NISSAN vehicle.
• The alignment machine should be checked to ensure that it is level.
2. Make sure the alignment machine is properly calibrated. Suspension component torques : Refer to
FSU-14,
"Component" . SMA525A
SFA392B
Revision: March 2010 2008 QX56

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INFINITI QX56 2008 Factory Service Manual FSU-8
< ON-VEHICLE MAINTENANCE >
ON-VEHICLE SERVICE
• Your alignment machine should be regularly calibrated in order to give correct information.
• Check with the manufacturer of your specific ali

FSU-8
< ON-VEHICLE MAINTENANCE >
ON-VEHICLE SERVICE
• Your alignment machine should be regularly calibrated in order to give correct information.
• Check with the manufacturer of your specific alignment machine for their recommended Service/Cali-
bration Schedule.
THE ALIGNMENT PROCESS
IMPORTANT: Use only the alignment specifications listed in this Service Manual. Refer to FSU-25,
"Wheelarch Height (Unladen*1)" .
1. When displaying the alignment settings, many alignment machines use “indicators”: (Green/red, plus or minus, Go/No Go). Do NOT use these indicators.
• The alignment specifications programmed into your alignment machine that operate these indicators may not be correct.
• This may result in an ERROR.
2. Some newer alignment machines are equipped with an optional “Rolling Compensation” method to “com- pensate” the sensors (alignment targets or head units). Do NOT use this “Rolling Compensation”
method.
• Use the “Jacking Compensation” method. After inst alling the alignment targets or head units, raise the
vehicle and rotate the wheels 1/2 turn both ways.
• See Instructions in the alignment machine you are using for more information.
CAMBER AND CASTER
1. Measure camber and caster of both the right and left wheels
with a suitable alignment gauge and adjust as necessary to
specification.
NOTE:
Some vehicles may be equipped with straight (non-adjustable)
lower link bolts and washers. In order to adjust camber and
caster on these vehicles, first replace the lower link bolts and
washers with adjustable (cam) bolts and washers.
2. If outside of the specified value, adjust camber and caster using the cam bolts (1) in the front lower link (2).
CAUTION:
After adjusting the camber and caster check the toe-in.
NOTE:
Camber changes about 3' (0.05 °) with each graduation of one
cam bolt (1). Refer to table below for examples of lower link cam
bolt (1) effect on camber and caster.
3. Tighten the cam bolt nuts to specification. Refer to FSU-14, "
Component" .
TOE-IN
WARNING:
• Always perform the following procedure on a flat surface.
Camber
and caster
: Refer to
FSU-25, "
Wheelarch Height (Un-
laden*1)" .
SRA096A
WEIA0153E
Rear cam bolt 1 In 1 Out 1 In 1 Out 0 01 In 1 Out
Front cam bolt 1 Out 1 In 1 In 1 Out 1 In 1 Out 0 0
Camber
Degree minute
(Decimal degree) 0 (0) 0 (0) 7' (0.12
°) - 7' (-0.12 °)3' (0.05 °) - 3' (-0.05 °)3' (0.05 °) - 3' (-0.05 °)
Caster
Degree minute
(Decimal degree) - 14' (-0.23
°) 14' (0.23 °) 0 (0) 0 (0) 7' (0.12 °) - 7' (-0.12 °) - 7' (-0.12 °)7' (0.12 °)
Revision: March 2010 2008 QX56

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INFINITI QX56 2008 Factory Service Manual ON-VEHICLE SERVICEFSU-9
< ON-VEHICLE MAINTENANCE >
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• Make sure that no person is in front of the vehicle before pushing it.
1. Bounce the front of vehicle up and dow

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• Make sure that no person is in front of the vehicle before pushing it.
1. Bounce the front of vehicle up and down to stabilize the vehicle height (posture).
2. Push the vehicle straight ahead about 5 m (16 ft).
3. Put a mark on base line of the tread (rear side) of both front tires at the same height as hub center as shown. These marks are
measuring points.
4. Measure the distance “A” on the rear side of the front tires as shown.
5. Push the vehicle slowly ahead to rotate the wheels 180 °
degrees (1/2 a turn).
CAUTION:
If the wheels have rotated more than 180 ° (1/2 turn), start
this procedure again from th e beginning. Never push the
vehicle backward.
6. Measure the distance “B” on the front side of the front tires at the
same marks as shown. Total toe-in is calculated as “A” – “B”.
7. Adjust the toe-in by varying the length of the steering outer socket.
a. Loosen the outer tie-rod lock nuts.
b. Adjust the toe-in by screwing the outer tie-rods in or out.
c. Tighten the outer tie-rod lock nuts to specification.
FRONT WHEEL TURNING ANGLE
NOTE:
Check front wheel turning angle after the toe-in inspection.
1. Place front wheels on turning radius gauges in straight ahead position and rear wheels on stands so that vehicle can be level.
Check the maximum inner and outer wheel turning angles for LH
and RH road wheels.
2. Start engine and run at idle, turn steering wheel all the way right and left, measure the turning angle.
• Any turning angles are not adjustable. If any of steering anglesare out of the specification, check if the following parts are
worn or damaged.
AFA050
Total toe-in : Refer to FSU-24, "Wheel Alignment (Un-
laden*1)" .
SFA234AC
Standard length “L” : Refer to ST-37, "Steering Outer
Socket and Inner Socket" .
Lock nut : Refer to ST-31, "
Disassembly and
Assembly" .
SGIA0167E
Wheel turning angle
(full turn) : Refer to FSU-24, "Wheel
Alignment (Unladen*1)" .
SFA439BA
Revision: March 2010
2008 QX56

Page 2127 of 4083

INFINITI QX56 2008 Factory Service Manual FSU-10
< ON-VEHICLE MAINTENANCE >
ON-VEHICLE SERVICE
- Steering gear
- Steering column
- Front suspension componentsIf found that they are worn or damaged, replace them with new ones.
Revision: March

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INFINITI QX56 2008 Factory Service Manual UPPER BALL JOINT AND LOWER BALL JOINTFSU-11
< ON-VEHICLE MAINTENANCE >
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UPPER BALL JOINT AND LOWER BALL JOINT
InspectionINFOID:0000000001534641
• Check the ball joint

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