2009 INFINITI QX56 Factory Service Manual

lock length tire pressure reset sensor lug pattern headlamp

Page 1833 of 4171

INFINITI QX56 2009 Factory Service Manual EM-10
< FUNCTION DIAGNOSIS >
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
FUNCTION DIAGNOSIS
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting - Engine NoiseINFOID:000

Page 1834 of 4171

INFINITI QX56 2009 Factory Service Manual NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGEM-11
< FUNCTION DIAGNOSIS >
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Use the Chart Below to Help You
Find the Cause of the SymptomINFOID:0000000005885860
1

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGEM-11
< FUNCTION DIAGNOSIS >
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Use the Chart Below to Help You
Find the Cause of the SymptomINFOID:0000000005885860
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.
1. Timing chain 2. Intake valve3. Exhaust valve
4. Drive belt 5. Water pumpA. VTC noise
B. Tappet noise C. Camshaft bearing noiseD. Valve mechanism
E. Rotation mechanism F. Piston pin noise G. Piston slap noise
H. Main bearing noise I. Connecting rod bearing noise J. Drive belt noise (slipping)
K. Drive belt noise (stick/slipping) L. Water pump noise M. Timing chain and chain tensioner noise
Location of noise Ty p e o f
noise Operating condition of engine
Source of noise Check item Refer-
ence page
Be-
fore
warm-
up After
warm- up When
start- ing When
idling When
racing While
driv- ing
Top of en-
gine
Rocker cov-
er
Cylinder
head Ticking or
clicking
C A — A B — Tappet noise Valve clearance
EM-18
Rattle C A — A B CCamshaft
bearing noiseCamshaft journal clear-
ance
Camshaft runout EM-53EM-53
Crankshaft
pulley
Cylinder
block (Side
of engine)
Oil panSlap or
knock
—A—B B—
Piston pin
noisePiston and piston pin
clearance
Connecting rod bushing
clearance
EM-90
EM-90
Slap or
rap
A——B B A
Piston slap
noisePiston-to-bore clear-
ance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsion EM-90EM-90
EM-90
EM-90
Knock A B C B B B
Connecting
rod bearing
noiseConnecting rod bushing
oil clearance (Small
end)
Connecting rod bearing
clearance (Big end)
EM-90EM-90
Knock A B — A B C
Main bearing
noiseMain bearing oil clear-
ance
Crankshaft runout EM-90EM-90
Front of en-
gine
Chain case
cover
Front coverTapping
or ticking
AA—BBB Timing chain
and chain
tensioner
noiseTiming chain cracks
and wear
Timing chain tensioner
operation
EM-45
EM-45
Revision: December 20092009 QX56

Page 1835 of 4171

INFINITI QX56 2009 Factory Service Manual EM-12
< FUNCTION DIAGNOSIS >
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
A: Closely related B: Related C: Sometimes related —: Not relatedFront of en-
gine
Squeak-
ing or
fizzing
AB—B�

Page 1836 of 4171

INFINITI QX56 2009 Factory Service Manual DRIVE BELTSEM-13
< ON-VEHICLE MAINTENANCE >
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ON-VEHICLE MAINTENANCE
DRIVE BELTS
Exploded ViewINFOID:0000000005885861
Checking Drive BeltsINFOID:0000000005885862
WARNING:

Page 1837 of 4171

INFINITI QX56 2009 Factory Service Manual EM-14
< ON-VEHICLE MAINTENANCE >
DRIVE BELTS
2. Install Tool on drive belt auto tensioner pulley bolt, move in thedirection of arrow (loosening direction of tensioner) as shown.
WARNING:
Avoid placing

Page 1838 of 4171

INFINITI QX56 2009 Factory Service Manual AIR CLEANER FILTEREM-15
< ON-VEHICLE MAINTENANCE >
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AIR CLEANER FILTER
Exploded ViewINFOID:0000000005885865
Removal and Installation (Viscous paper type)INFOID:0000000005

Page 1839 of 4171

INFINITI QX56 2009 Factory Service Manual EM-16
< ON-VEHICLE MAINTENANCE >
SPARK PLUG
SPARK PLUG
Exploded ViewINFOID:0000000005885867
Removal and InstallationINFOID:0000000005885868
REMOVAL
1. Disconnect the harness connector from the ignitio

Page 1840 of 4171

INFINITI QX56 2009 Factory Service Manual SPARK PLUGEM-17
< ON-VEHICLE MAINTENANCE >
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• Checking and adjusting plug gap is not required between change
intervals.
INSTALLATION
Installation is in the reverse orde

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