Infiniti G35 (V35). Manual - part 508

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

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NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

PFP:00003

NVH Troubleshooting Chart

NDS0001V

Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.

×

: Applicable

Reference page

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Possible cause and SUSPECTED PARTS

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TIRES

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STEERING

Symptom

FRONT AXLE

Noise

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Shake

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Vibration

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Shimmy

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Judder

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Poor quality ride or handling

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FAX-4

FRONT WHEEL HUB AND KNUCKLE

FRONT WHEEL HUB AND KNUCKLE

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On-Vehicle Inspection

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Make sure the mounting conditions (looseness, back lash) of each component and component conditions
(wear, damage) are normal.

WHEEL BEARING INSPECTION

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

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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 Installation

NDS0001X

COMPONENTS

REMOVAL

1.

Remove tires from vehicle with power tool.

2.

Remove undercover with power tool.

3.

Remove brake caliper with power tool. Hang it in a place where it will not interfere with work. Refer to 

BR-

21, "FRONT DISC BRAKE"

 .

NOTE:
Avoid depressing brake pedal while brake caliper is removed.

4.

Remove disc rotor. Refer to 

BR-23, "Removal and Installation of Brake Caliper Assembly"

 .

5.

Remove wheel sensor from steering knuckle. Refer to 

BRC-58, "WHEEL SENSOR"

 .

CAUTION:

Do not pull on wheel sensor harness.

6.

Remove brake hose bracket from steering knuckle. Refer to 

BR-11, "BRAKE PIPING AND HOSE"

 .

7.

Remove cotter pin at steering outer socket, then loosen mounting nut.

Axial end play limit 

: 0.05 mm (0.002 in) or less

PDIA1117E

1.

Steering knuckle

2.

Ball seat

3.

Cotter pin

4.

Hub cap

5.

Washer

6.

Splash guard

7.

Wheel hub and bearing assembly

Refer to

GI-10, "Components"

 , for the symbols in the figure.

FRONT WHEEL HUB AND KNUCKLE

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8.

Use a ball joint remover (SST) to remove steering outer socket
from steering knuckle. Be careful not to damage ball joint boot.

CAUTION:

Tighten temporarily mounting nut to prevent damage to
threads and to prevent ball joint remover (SST) from com-
ing off.

9.

After removing upper link, transverse link, compression rod and
cotter pin at steering knuckle, loosen mounting nut.

10. Use a ball joint remover (suitable tool) to remove upper link,

transverse link and compression rod from steering knuckle. Be
careful not to damage ball joint boot.

CAUTION:

Tighten temporarily mounting nut to prevent damage to threads and to prevent ball joint remover
(suitable tool) from coming off.

11. Remove steering knuckle and wheel hub and bearing assembly mounting bolt.

12. Remove wheel hub and bearing assembly from steering knuckle.

INSPECTION AFTER REMOVAL

About the inspection for upper link, compression rod, steering outer socket, refer to  

FSU-14, "UPPER LINK"

 ,

FSU-16, "COMPRESSION ROD"

 , 

PS-19, "POWER STEERING GEAR AND LINKAGE"

 .

Visual Inspection

●

Check steering knuckle and ball seat for deformation, cracks, and other damage. Replace steering
knuckle and ball seat if cracks, deformation or other damage is found.

●

Check ball joint boot for deformation, damage, and also for grease leakage. Replace steering knuckle
assembly if cracks, deformation or also for grease leakage is found.

Steering Knuckle Ball Joint Inspection

Manually move ball stud to confirm it moves smoothly with no binding.

Swing Torque Inspection

NOTE:
Before measurement, move ball joint at least 10 times by hand to check for smooth movement.

●

Hook a spring balance at cotter pin mounting hole. Confirm
spring balance measurement value is within specifications when
ball stud begins moving.

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If it is outside the standard, replace steering knuckle.

Rotating Torque Inspection

●

Attach mounting nut to ball stud. Check that rotating torque is
within specifications with a preload gauge (SST).

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If it is outside the standard, replace steering knuckle.

SGIA0341E

Swing force:

 0.147 - 1.4 N·m (0.02 - 0.14 kg-m, 2 - 12 in-lb)

Measurement force:

 2.23 - 21.2 N (0.22 - 2.16 kg, 0.50 - 4.77 lb)

SEIA0523E

Tool number A: ST3127S000 (J-25765-A)

Rotating torque:

 0.147 - 1.4 N·m (0.02 - 0.14 kg-m, 2 - 12 in-lb)

PDIA1258E

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FRONT WHEEL HUB AND KNUCKLE

Axial End Play Inspection

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Move tip of ball joint in axial direction to check for looseness.

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If it is outside the standard, replace steering knuckle.

INSTALLATION

●

Refer to 

FAX-4, "Removal and Installation"

  for tightening torque. Install in the reverse order of removal.

NOTE:
Refer to component parts location and do not reuse non-reusable parts.

●

Wheel hub and bearing assembly and disc must be installed to
fit the marked position each other.

Axial end play

: 0 mm (0 in)

SDIA1147E