2007 INFINITI QX56 Factory Service Manual

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Page 1777 of 3061

INFINITI QX56 2007 Factory Service Manual
PREPARATIONEM-7
< SERVICE INFORMATION >
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KV10115600
(J-38958)
Valve oil seal drift
Installing valve oil seal
Use side A.
a: 20 (0.79) dia. d: 8 (0.31) dia.
b

Page 1778 of 3061

INFINITI QX56 2007 Factory Service Manual
EM-8
< SERVICE INFORMATION >
PREPARATION
Commercial Service Tool
INFOID:0000000003531517
(Kent-Moore No.)
Tool name Description
Power tool Loosening bolts and nuts
Spark plug wrench Removing and inst

Page 1779 of 3061

INFINITI QX56 2007 Factory Service Manual
PREPARATIONEM-9
< SERVICE INFORMATION >
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Valve guide drift Removing and installing valve guide
Intake & Exhaust:
a: 9.5 mm (0.374 in) dia.
b: 5.5 mm (0.217 in) dia.
Valv

Page 1780 of 3061

INFINITI QX56 2007 Factory Service Manual
EM-10
< SERVICE INFORMATION >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting - Engine NoiseINFOID:0000000003586490
AWBIA

Page 1781 of 3061

INFINITI QX56 2007 Factory Service Manual
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGEM-11
< SERVICE INFORMATION >
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Use the Chart Below to Help You
Find the Cause of the SymptomINFOID:0000000003531519

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGEM-11
< SERVICE INFORMATION >
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Use the Chart Below to Help You
Find the Cause of the SymptomINFOID:0000000003531519
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.
A: Closely related B: Related C: Sometimes related —: Not relatedB. Tappet noise C. Camshaft bearing noise D. 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-56
Rattle C A — A B CCamshaft
bearing noiseCamshaft journal clear-
ance
Camshaft runout EM-46EM-46
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-93
EM-93
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-93EM-93
EM-93
EM-93
Knock A B C B B B
Connecting
rod bearing
noiseConnecting rod bushing
oil clearance (Small
end)
Connecting rod bearing
clearance (Big end)
EM-93EM-93
Knock A B — A B C
Main bearing
noiseMain bearing oil clear-
ance
Crankshaft runout EM-93EM-93
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-38
EM-38
Front of en-
gineSqueak-
ing or
fizzing
AB—B—C
Drive belts
(Sticking or
slipping)Drive belts deflection
EM-13Creaking A B A B A B Drive belts
(Slipping)Idler pulley bearing op-
eration
Squall
Creaking AB—BAB Water pump
noiseWater pump operation
EM-38
Rattle — — A — — — VTC VTC lockpin clearance EM-55

Page 1782 of 3061

INFINITI QX56 2007 Factory Service Manual
EM-12
< SERVICE INFORMATION >
ENGINE ROOM COVER
ENGINE ROOM COVER
Removal and InstallationINFOID:0000000003531520
REMOVAL
• Remove the engine cover bolts and cover.CAUTION:
Do not damage or scratch

Page 1783 of 3061

INFINITI QX56 2007 Factory Service Manual
DRIVE BELTSEM-13
< SERVICE INFORMATION >
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DRIVE BELTS
Checking Drive BeltsINFOID:0000000003531521
WARNING:
Be sure to perform when the engine is stopped.
1. Remove air d

Page 1784 of 3061

INFINITI QX56 2007 Factory Service Manual
EM-14
< SERVICE INFORMATION >
DRIVE BELTS
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Make sure belt is securely installed around all pulleys.
• Rotate the crankshaft pul

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