2008 INFINITI QX56 steering

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 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

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 2010 2008 QX56

FSU-14
< ON-VEHICLE REPAIR >
FRONT SUSPENSION ASSEMBLY
ON-VEHICLE REPAIR
FRONT SUSPENSION ASSEMBLY
ComponentINFOID:0000000001534626
1. Dust cover2. Shock absorber 3. Upper link
4. Steering knuckle 5. Cotter pin 6. bolt
7. Jounce bumper 8. washer 9. Lower link
10. Stabilizer bar 11. Stabilizer bar bushing 12. Stabilizer bar mounting bracket
13. Connecting rod 14. Coil spring 15. Upper seat
16. Upper spring seat 17. Shock absorber bushing 18. Shock absorber mounting insulator
19. Spacer 20. Washer ⇐Front
AWEIA0142GB
Revision: March 2010 2008 QX56

COIL SPRING AND SHOCK ABSORBERFSU-15
< REMOVAL AND INSTALLATION >
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REMOVAL AND INSTALLATION
COIL SPRING AN D SHOCK ABSORBER
Removal and InstallationINFOID:0000000001534629
REMOVAL
1. Remove the wheel and tire using power tool.
2. Remove the shock absorber lower bolt using power tool.
3. Remove the three shock absorber upper nuts using power tool.
4. Remove the coil spring and shock absorber assembly.
• Turn steering knuckle out to gain enough clearance forremoval.
INSTALLATION
Installation is in the reverse order of removal.
• The lower seat step (2) in the shock absorber assembly (1) faces
outside of vehicle.
- Upper spring insulator (3)
- ⇐ : Front
• Tighten all nuts and bolts to specification. Refer to FSU-14, "
Com-
ponent" .
• When installing wheel and tire, refer to WT-48, "
Rotation".
DisposalINFOID:0000000006081164
1. Set shock absorber horizontally with the piston rod fully extended.
2. Drill 2 – 3 mm (0.08 – 0.12 in) hole (A) at the position ( ) from
top as shown in the figure to release gas gradually.
CAUTION:
• Wear eye protection (safety glasses).
• Wear gloves.
• Be careful with metal chips or oil blown out by the com-pressed gas.
NOTE:
• Drill vertically in this direction ( ).
• Directly to the outer tube avoiding brackets.
• The gas is clear, colorless, odorless, and harmless.
3. Position the drilled hole downward and drain oil by moving the piston rod several times. CAUTION:
Dispose of drained oil according to the law and local regulations.
LEIA0093E
WEIA0155E
A : 20 – 30 mm (0.79 – 1.18 in)
JPEIA0161ZZ
Revision: March 2010 2008 QX56

UPPER LINKFSU-17
< REMOVAL AND INSTALLATION >
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UPPER LINK
Removal and InstallationINFOID:0000000001534634
REMOVAL
1. Remove the wheel and tire using power tool.
2. Remove the fender protector to access upper link. Refer to EXT-23, "
Removal and Installation" .
3. Remove cotter pin and nut from upper link ball joint and discard the cotter pin.
4. Separate upper link ball joint stud from steering knuckle using Tool.
• Support lower link with jack.
5. Remove upper link bolts and nuts, then remove upper link.
INSPECTION AFTER REMOVAL
Upper Link
Check for deformation and cracks. Replace if necessary.
Upper Link Ball Joint
Check for distortion and damage. Replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.
• Tighten all nuts and bolts to specification. Refer to FSU-14, "
Component".
CAUTION:
Use a new cotter pin for installation of upper link ball joint nut.
• When installing wheel and tire, refer to WT-48, "
Rotation".
• After installation, check that the front wheel alignment is within specification. Refer to FSU-7, "
Front Wheel
Alignment" .
Tool number : ST29020001 (J-24319-01)
LEIA0095E
LEIA0096E
Revision: March 2010
2008 QX56

FSU-18
< REMOVAL AND INSTALLATION >
LOWER LINK
LOWER LINK
Removal and InstallationINFOID:0000000001534635
REMOVAL
1. Remove the wheel and tire using power tool.
2. Remove lower shock absorber bolt.
3. Remove stabilizer bar connecting rod lower nut using power tool, then separate connecting rod from lowerlink. Refer to FSU-16, "
Removal and Installation" .
4. Remove drive shaft nut, if equipped. Refer to FA X - 9 , "
Removal and Installation" .
5. Remove pinch bolt from steering knuckle using power tool, then separate lower link ball joint from steering knuckle.
6. Remove lower link cam bolts (1) and nuts, then the lower link (2).
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.
INSPECTION AFTER REMOVAL
Lower Link
Check for deformation and cracks. Replace if necessary.
Lower Link Bushing
Check for distortion and damage. Replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.
• Tighten all nuts and bolts to specification. Refer to FSU-14, "
Component".
• When installing wheel and tire, refer to WT-48, "
Rotation".
• After installation, check that the front wheel alignment is within specification. Refer to FSU-7, "
Front Wheel
Alignment" .
LEIA0097E
WEIA0153E
Revision: March 2010 2008 QX56

FSU-20
< REMOVAL AND INSTALLATION >
KNUCKLE
KNUCKLE
Removal and InstallationINFOID:0000000001534639
REMOVAL
1. Remove wheel hub and bearing assembly. Refer to FA X - 7 , "Removal and Installation" .
• Disconnect wheel sensor harness connector. Do not remove wheel sensor from wheel hub and bearing
assembly for this procedure.
2. Remove steering outer socket from steering knuckle using Tool. CAUTION:
• Be careful not to damage ball joint boot.
• Temporarily tighten nut to prevent damage to threads andto prevent Tool from coming off.
3. Remove the coil spring and shock absorber assembly using power tool. Refer to FSU-15, "
Removal and
Installation" .
4. Support lower link using a suitable jack.
5. Remove cotter pin and nut from upper link ball joint and discard the cotter pin.
6. Separate upper link ball joint from steering knuckle using Tool.
1. Disc rotor 2. Wheel hub and bearing assembly 3. Wheel stud
4. Splash guard 5. Steering knuckle Front
AWDIA0423GB
Tool number : HT72520000 (J-25730-A)
WGIA0130E
Tool number : ST29020001 (J-24319-01)
LEIA0095E
Revision: March 2010 2008 QX56

KNUCKLEFSU-21
< REMOVAL AND INSTALLATION >
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7. Remove pinch bolt from steering knuckle using power tool, then separate lower link ball joint from steering knuckle.
8. Remove steering knuckle from vehicle.
INSPECTION AFTER REMOVAL
Check for deformity, cracks and damage on each part, replace if necessary.
• Perform ball joint inspection. Refer to FSU-11, "
Inspection" .
INSTALLATION
Installation is in the reverse order of removal.
• Refer to FSU-14, "
Component" for tightening torques.
CAUTION:
Use a new cotter pin for installation of lock nut.
• When installing disc rotor on wheel hub and bearing assembly, align the marks.
NOTE:
When not using the alignment mark, refer to BR-7, "
DISC ROTOR
: Inspection" .
• When installing wheel and tire, refer to WT-48, "
Rotation" .
LEIA0097E
WDIA0044E
Revision: March 2010 2008 QX56