Infiniti F50. Manual — part 822
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
WT-3
C
D
F
G
H
I
J
K
L
M
A
B
WT
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
—
—
—
—
—
—
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):
SFA975B
Radial runout = (A+B)/2
Lateral runout = (C+D)/2
Wheel runout
SFA981B
ROAD WHEEL TIRE ASSEMBLY
WT-5
C
D
F
G
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A
B
WT
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)
×
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)
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