Infiniti Q45 (FY33). Manual — part 411
Tool name
Description
Front oil seal drift
NT049
Installing front oil seal
a = 65 mm (2.56 in) dia.
b = 45 mm (1.77 in) dia.
Rear oil seal drift
NT049
Installing rear oil seal
a = 100 mm (3.94 in) dia.
b = 80 mm (3.15 in) dia.
GI
MA
LC
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
PREPARATION
Commercial Service Tools (Cont’d)
EM-5
SEM626F
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-6
NVH Troubleshooting — Engine Noise
Use the table below to help you find the cause of the symptom.
1.
Locate the area where noise occurs.
2.
Confirm the type of noise.
3.
Specify the operating condition of the engine.
4.
Check the specified noise source.
If necessary, repair or replace these parts.
Location of
noise
Type of
noise
Operating condition of engine
Source of
noise
Check item
Reference
page
Before
warm-up
After
warm-up
When
starting
When
idling
When
racing
While
driving
Top of
engine
Rocker
cover
Cylinder
head
Ticking or
clicking
C
A
—
A
B
—
Tappet
noise
Hydraulic lash adjuster
Rattle
C
A
—
A
B
C
Camshaft
bearing
noise
Camshaft journal clearance
Camshaft runout
Crankshaft
pulley
Cylinder
block (Side
of engine)
Oil pan
Slap or
knock
—
A
—
B
B
—
Piston pin
noise
Piston and piston pin clear-
ance
Connecting rod bushing
clearance
Slap or rap
A
—
—
B
B
A
Piston slap
noise
Piston-to-bore clearance
Piston ring side clearance
Piston ring end gap
Connecting rod bend and
torsion
Knock
A
B
C
B
B
B
Connecting
rod bearing
noise
Connecting rod bushing
clearance (Small end)
Connecting rod bearing
clearance (Big end)
Knock
A
B
—
A
B
C
Main bear-
ing noise
Main bearing oil clearance
Crankshaft runout
Front of
engine
Timing
chain cover
Tapping or
ticking
A
A
—
B
B
B
Timing
chain and
chain ten-
sioner noise
Timing chain cracks and
wear
Front of
engine
Squeaking
or fizzing
A
B
—
B
—
C
Other drive
belts (Stick-
ing or slip-
ping)
Drive belt deflection
MA section
(“Checking
Drive Belts”,
“ENGINE
MAINTE-
NANCE”)
Creaking
A
B
A
B
A
B
Other drive
belts (Slip-
ping)
Idler pulley bearing operation
Squall
Creak
A
B
—
B
A
B
Water pump
noise
Water pump operation
LC section
(“Water
Pump
Inspection”,
“ENGINE
COOLING
SYSTEM”)
A: Closely related
B: Related
C: Sometimes related
—: Not related
GI
MA
LC
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-7
SEM622FA
q
1
Intake manifold collector
q
2
EGR valve
q
3
EGR temperature sensor
q
4
Throttle body
q
5
IACV-AAC valve
q
6
Injector
q
7
Fuel tube assembly
q
8
Intake manifold
OUTER COMPONENT PARTS
EM-8
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