Infiniti QX56 (Z62). Manual - part 736

FSU-4

< PREPARATION >

PREPARATION

PREPARATION

PREPARATION

Special Service Tools

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The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Commercial Service Tools

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Tool number 
(Kent-Moore No.)
Tool name

Description

ST35652000
(

−

)

Shock absorber attachment

Disassembling and assembling shock 
absorber 

ST3127S000
(J-25765-A)
Preload gauge

Measuring rotating torque of ball joint

ZZA0807D

ZZA0806D

Tool name

Description

Power tool

Loosening bolts and nuts

Spring compressor

Removing and installing coil spring

PBIC0190E

S-NT717

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

FSU-5

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting Chart

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

×

: Applicable

Reference page

FSU-9

, 

FSU-1

4

, 

FSU-1

7

FS

U-12

—

—

—

FSU-9

, 

FSU-1

4

, 

FSU-1

7

FS

U-

7

FS

U-20

NVH in DLN section.

NVH in DLN section.

NVH in

 F

AX an

d F

S

U

 s

e

c

ti

o

ns

.

NVH in WT section.

NVH in WT section.

NVH in F

AX section.

NVH in B

R

 section.

NVH in S

T

 section.

Possible cause and SUSPECTED PARTS

Im

pro

pe

r in

st

al

lat

ion

, 

lo

ose

n

ess

S

hoc

k

 ab

so

rbe

r d

e

fo

rma

tio

n,

 da

ma

ge

 o

r de

fle

c

tion

B

u

s

h

in

g 

or m

o

u

n

ting

 d

e

te

rio

rati

o

n

P

a

rt

s interference

S

p

ri

ng

 fat

ig

u

e

S

us

pe

ns

ion

 lo

os

en

es

s

In

co

rrec

t wh

ee

l a

lig

nm

en

t

S

ta

b

iliz

er b

a

r f

a

ti

gu

e

PR

OP

EL

LE

R

 S

H

A

F

T

DIFFERENTIAL (4WD)

F

R

ONT

 AXLE AND FRONT S

U

SPENSION

TI

RE

ROAD  

 WHEEL

DRIV

E SHAFT

 (4W

D

)

BR

AK

E

S

T

EERING

Symptom

FRONT SUSPENSION

Noise

×

×

×

×

×

×

×

×

×

×

×

×

×

×

Shake

×

×

×

×

×

×

×

×

×

×

×

×

Vibration

×

×

×

×

×

×

×

×

×

×

Shimmy

×

×

×

×

×

×

×

×

×

×

Judder 

×

×

×

×

×

×

×

×

Poor quality ride or 
handling

×

×

×

×

×

×

×

×

×

×

FSU-6

< PERIODIC MAINTENANCE >

FRONT SUSPENSION ASSEMBLY

PERIODIC MAINTENANCE

FRONT SUSPENSION ASSEMBLY

Inspection

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MOUNTING INSPECTION

Check the mounting conditions (looseness, backlash) of each component and component conditions (wear,
damage) are normal.

BALL JOINT AXIAL END PLAY

1.

Set front wheels in a straight-ahead position.

2.

Measure axial end play by playing and moving up/down with iron bar or equivalent between lower link or
upper link and steering knuckle.

CAUTION:

• Never depress brake pedal when measuring.
• Never perform with tires on level ground.
• Be careful not to damage ball joint boot. Never damage the installation position by applying

excessive force.

Shock absorber

Check for oil leakage, damage. Replace it if necessary.

Axial end play

: Refer to 

FSU-21, "Ball Joint"

.

WHEEL ALIGNMENT

FSU-7

< PERIODIC MAINTENANCE >

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WHEEL ALIGNMENT

Inspection

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DESCRIPTION

Measure wheel alignment under unladen conditions. 
NOTE:
“Unladen conditions” means that fuel, engine coolant, and lubricant are full. Spare tire, jack, hand tools and
mats are in designated positions.

PRELIMINARY CHECK

Check the following:
• Tires for improper air pressure and wear
• Road wheels for runout: Refer to 

WT-64, "Inspection"

.

• Wheel bearing axial end play: Refer to 

FAX-7, "Inspection"

 (2WD), 

FAX-16, "Inspection"

 (4WD).

• Lower link and upper link ball joint axial end play: Refer to 

FSU-15, "Inspection"

 and 

FSU-18, "Inspection"

.

• Shock absorber operation.
• Each mounting part of axle and suspension for looseness and deformation
• Lower link for cracks, deformation and other damage
• Vehicle height (posture)

GENERAL INFORMATION AND RECOMMENDATIONS

• A four-wheel thrust alignment should be performed.
- This type of alignment is recommended for any NISSAN/INFINITI vehicle.
- The four-wheel “thrust” process helps ensure that the vehicle is properly aligned and the steering wheel is

centered.

- The alignment rack itself should be capable of accepting any NISSAN/INFINITI vehicle.
- The rack should be checked to ensure that it is level.
• Make sure the machine is properly calibrated.
- Your alignment equipment should be regularly calibrated in order to give correct information.
- Check with the manufacturer of your specific equipment for their recommended Service/Calibration Sched-

ule.

ALIGNMENT PROCESS

IMPORTANT:
Use only the alignment specifications listed in this Service Manual.
• When displaying the alignment settings, many alignment machines use “indicators”: (Green/red, plus or

minus, Go/No Go). Never use these indicators.

- The alignment specifications programmed into your machine that operate these indicators may not be cor-

rect.

- This may result in an ERROR.
• Some newer alignment machines are equipped with an optional “Rolling Compensation” method to “com-

pensate” the sensors (alignment targets or head units). Never use this “Rolling Compensation” method.

- Use the “Jacking Compensation Method”. After installing the alignment targets or head units, raise the vehi-

cle and rotate the wheels 1/2 turn both ways.

- See Instructions in the alignment machine you're using for more information on this.

Adjustment

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CAMBER, CASTER

1.

Adjust with the front/rear side adjusting bolts (1) on the lower link
(2). 

2.

See the following table for the amount of cam bolt scale move-
ment and the variation of camber and caster. 

CAUTION:

Align the adjusting bolt cutout with the stamp of lower link
bracket. 

: Vehicle front

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