Infiniti F50. Manual - part 822

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

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NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

PFP:00003

NVH Troubleshooting Chart

EES000D6

Use the 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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-4

—

—

—

—

—

—

N

V

H in

 PR s

e

c

ti

o

n

.

N

V

H in

 RFD s

e

c

ti

o

n

.

N

V

H 

in

 F

AX a

n

d

 FSU s

e

c

tio

n

s

.

N

V

H in

 RAX a

n

d

 RSU s

e

c

ti

o

n

s

.

Re

fe

r to

 T

IR

E

S

 in

 t

h

is

 c

h

a

rt.

Re

fe

r to

 ROAD W

H

EEL

 i

n

 th

is

 c

h

a

rt

.

N

V

H in

 RAX s

e

c

ti

o

n

.

N

V

H in

 BR s

e

c

ti

o

n

.

N

V

H in

 PS s

e

c

tio

n

.

Possible cause and SUSPECTED PARTS

Ou

t-

o

f-r

o

u

n

d

Im

bal

ance

In

c

o

rr

e

c

t tir

e

 p

re

s

s

u

re

U

n

e

v

en t

ir

e

 w

ear

D

e

fo

rm

a

ti

on or

 d

a

m

age

N

o

n

-un

if

or

m

it

y

In

c

o

rr

e

c

t tir

e

 s

iz

e

PROPELL

E

R SHAF

T

DIFFERENTIAL

FRONT AXLE AND 

F

R

O

N

T

 SUSPENSION

REAR AXLE AND 

RE

AR 

SUSPENSION

TIRES

ROAD W

H

EEL

D

R

IV

E

 SH

AF

T

BRAKE

STEERING

Symptom

TIRES

Noise

×

×

×

×

×

×

×

×

×

×

×

×

×

×

Shake

×

×

×

×

×

×

×

×

×

×

×

×

×

Vibration

×

×

×

×

×

×

×

Shimmy

×

×

×

×

×

×

×

×

×

×

×

×

Judder

×

×

×

×

×

×

×

×

×

×

×

Poor quality ride 
or handling

×

×

×

×

×

×

×

×

×

ROAD WHEEL

Noise

×

×

×

×

×

×

×

×

×

×

×

Shake

×

×

×

×

×

×

×

×

×

×

Shimmy, judder

×

×

×

×

×

×

×

×

Poor quality ride 
or handling

×

×

×

×

×

×

WT-4

ROAD WHEEL

ROAD WHEEL

PFP:40300

Inspection

EES000D1

ALUMINUM WHEEL

1.

Check tires for wear and improper inflation.

2.

Check wheels for deformation, cracks and other damage. If
deformed, remove wheel and check wheel runout.

a.

Remove tire from aluminum wheel and mount on a tire balance
machine.

b.

Set dial indicator as shown in the illustration.

STEEL WHEEL

1.

Check tires for wear and improper inflation.

2.

Check wheels for deformation, cracks and other damage. If
deformed, remove wheel and check wheel runout.

a.

Remove tire from steel wheel and mount wheel on a tire balance
machine.

b.

Set two dial indicators as shown in the illustration.

c.

Set each dial indicator to 0.

d.

Rotate wheel and check dial indicators at several points around
the circumference of the wheel.

e.

Calculate runout at each point as shown below.

f.

Select maximum positive runout value and the maximum nega-
tive value.
Add the two values to determine total runout.
In case a positive or negative value is not available, use the
maximum value (negative or positive) for total runout.
If the total runout value exceeds the limit, replace steel wheel.

Wheel runout (Dial indicator value):

Refer to 

WT-28, "SERVICE DATA"

SFA975B

Radial runout = (A+B)/2

Lateral runout = (C+D)/2

Wheel runout

: Refer to 

WT-28, "SERVICE DATA"

SFA981B

ROAD WHEEL TIRE ASSEMBLY

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ROAD WHEEL TIRE ASSEMBLY

PFP:40300

Balancing Wheels (Bonding Weight Type)

EES000W3

REMOVAL

1.

Remove inner and outer balance weights from the road wheel.

CAUTION:

Be careful not to scratch the road wheel during removal.

2.

Using releasing agent, remove double-faced adhesive tape from the road wheel.

CAUTION:

●

Be careful not to scratch the road wheel during removal.

●

After removing double-faced adhesive tape, wipe clean traces of releasing agent from the road
wheel.

WHEEL BALANCE ADJUSTMENT 

●

If a tire balance machine has adhesion balance weight mode settings and drive-in weight mode setting,
select and adjust a drive-in weight mode suitable for road wheels.

1.

Set road wheel on wheel balancer using the center hole as a guide. Start the tire balance machine.

2.

When inner and outer unbalance values are shown on the wheel balancer indicator, multiply outer unbal-
ance value by 5/3 to determine balance weight that should be used. Select the outer balance weight with
a value closest to the calculated value above and install it to the designated outer position of, or at the
designated angle in relation to the road wheel.

CAUTION:

●

Do not install the inner balance weight before installing the outer balance weight.

●

Before installing the balance weight, be sure to clean the
mating surface of the road wheel.

Indicated unbalance value 

×

 5/3 = balance weight to be installed

Calculation example:
23 g (0.81 oz) 

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 5/3 = 38.33 g (1.35 oz) = 40 g (1.41 oz) balance

weight (closer to calculated balance weight value)
Note that balance weight value must be closer to the calculated
balance weight value.
Example:
37.4 = 35 g (1.23 oz)
37.5 = 40 g (1.41 oz)

a.

Install balance weight in the position shown in the figure at left.

b.

When installing balance weight to road wheels, set it into the
grooved area on the inner wall of the road wheel as shown in the
figure so that the balance weight center is aligned with the wheel
balancer indication position (angle).

CAUTION:

●

Always use genuine Nissan adhesion balance weights.

●

Balance weights are unreusable; always replace with new
ones.

●

Do not install more than three sheets of balance weight.

SMA054D

SMA055D

WT-6

ROAD WHEEL TIRE ASSEMBLY

c.

If calculated balance weight value exceeds 50 g (1.76 oz), install
two balance weight sheets in line with each other (as shown in
the figure).

CAUTION:

Do not install one balance weight sheet on top of another.

3.

Start wheel balancer again.

4.

Install drive-in balance weight on inner side of road wheel in the
wheel balancer indication position (angle).

CAUTION:

Do not install more than two balance weights.

5.

Start wheel balancer. Make sure that inner and outer residual
unbalance values are 10 g (0.35 oz) each or below.

●

If either residual unbalance value exceeds 10 g (0.35 oz), repeat installation procedures.

Wheel balance (Maximum allowable unbalance):

Rotation

EES000D5

●

Do not include the T-type spare tire when rotating the tires.

CAUTION:

When installing wheels, tighten them diagonally by dividing the work two to three times in order to
prevent the wheels from developing any distortion.

Maximum allowable 
unbalance

Dynamic (At rim flange)

10 g (0.35 oz) (one side)

Static

20 g (0.71 oz)

SMA056D

Tightening torque of wheel nut

:98 - 118 N-m (10 - 12 kg-m, 72 - 87 ft-lb)