Page 1889 of 3371
EM-6Revision: August 2007
PREPARATION
2004 QX56
KV10115600
(J-38958)
Valve oil seal driftInstalling valve oil seal
Use side A.
a: 20 (0.79) dia. d: 8 (0.31) dia.
b: 13 (0.51) dia. e: 10.7 (0.421) dia.
c: 10.3 (0.406) dia. f: 5 (0.20) dia.
Unit: mm (in)
EM03470000
(J-8037)
Piston ring compressorInstalling piston assembly into cylinder bore
ST16610001
(J-23907)
Pilot bushing pullerRemoving crankshaft pilot bushing
WS39930000
(—)
Tube presserPressing the tube of liquid gasket
—
(J-47245)
Ring gear stopperRemoving and installing crankshaft pulley
16441 6N210
(J-45488)
Quick connector releaseRemoving fuel tube quick connectors in en-
gine room
—
(J-46535)
Drive belt tension releaserReleasing drive belt tension Tool number
(Kent-Moore No.)
Tool nameDescription
S-NT603
S-NT044
S-NT045
S-NT052
LBIA0451E
PBIC0198E
W BIA0536E
Page 1890 of 3371
PREPARATION
EM-7
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: August 20072004 QX56
Commercial Service ToolsEBS00IL6
(Kent-Moore No.)
Tool nameDescription
Power toolLoosening bolts and nuts
Spark plug wrench Removing and installing spark plug
(J-24239-01)
Cylinder head bolt wrenchLoosening and tightening cylinder head bolt,
and use with angle wrench [SST:
KV10112100 (BT-8653-A)]
a: 13 (0.51) dia.
b: 12 (0.47)
c: 10 (0.39)
Unit: mm (in)
Valve seat cutter set Finishing valve seat dimensions
Pulley pullerRemoving crankshaft pulley
Piston ring expander Removing and installing piston ring
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.
PBIC0190E
S-NT047
NT583
S-NT048
ZZA0010D
S-NT030
S-NT015
Page 1891 of 3371
EM-8Revision: August 2007
PREPARATION
2004 QX56
Valve guide reamer 1: Reaming valve guide hole
2: Reaming hole for oversize valve guide
Intake & Exhaust:
d
1 : 6.0 mm (0.236 in) dia.
d
2 : 10.175 - 10.196 mm (0.4006 - 0.4014 in)
dia.
Front oil seal drift Installing front oil seal
Rear oil seal drift Installing rear oil seal
(J-43897-18)
(J-43897-12)
Oxygen sensor thread cleanerReconditioning the exhaust system threads
before installing a new A/F sensor and heated
oxygen sensor (Use with anti-seize lubricant
shown below.)
a: J-43897-18 (18 mm dia.) for zirconia
heated oxygen sensor
b: J-43897-12 (12 mm dia.) for titania heat-
ed oxygen sensor
Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL specifica-
tion MIL-A-907)Lubricating A/F sensors and heated oxygen
sensor thread cleaning tool when recondition-
ing exhaust system threads (Kent-Moore No.)
Tool nameDescription
S-NT016
ZZA0012D
ZZA0025D
AEM488
AEM489
Page 1892 of 3371
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
EM-9
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting —Engine NoiseEBS00IL7
KBIA2503E
Page 1893 of 3371

EM-10Revision: August 2007
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
2004 QX56
Use the Chart Below to Help You Find the Cause of the Symptom.EBS00IL8
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 relatedLocation of
noiseType of
noiseOperating condition of engine
Source of
noiseCheck itemRefer-
ence page Before
warm-
upAfter
warm-
upWhen
start-
ingWhen
idlingWhen
racingWhile
driv-
ing
To p o f
engine
Rocker
cover
Cylinder
headTicking or
clickingC A — A B — Tappet noise Valve clearanceEM-52
Rattle C A — A B CCamshaft
bearing noiseCamshaft journal clear-
ance
Camshaft runoutEM-47EM-47
Crankshaft
pulley
Cylinder
block (Side
of engine)
Oil panSlap or
knock—A—B B—Piston pin
noisePiston and piston pin
clearance
Connecting rod bush-
ing clearanceEM-90
EM-92
Slap or
rapA——BBAPiston slap
noisePiston-to-bore clear-
ance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsionEM-94EM-90
EM-90
EM-91
Knock ABCBBBConnecting
rod bearing
noiseConnecting rod bush-
ing oil clearance (Small
end)
Connecting rod bear-
ing clearance (Big end)EM-92EM-91
Knock A B — A B CMain bearing
noiseMain bearing oil clear-
ance
Crankshaft runoutEM-96EM-95
Front of
engine
Chain case
cover
Front coverTa p p i n g
or tickingAA—BBBTiming chain
and chain
tensioner
noiseTiming chain cracks
and wear
Timing chain tensioner
operationEM-39
EM-35
Front of
engineSqueak-
ing or
fizzingAB—B—CDrive belts
(Sticking or
slipping)Drive belts deflection
EM-12
CreakingABABABDrive belts
(Slipping)Idler pulley bearing
operation
Squall
CreakingAB—BABWater pum p
noiseWater pump operationCO-15,
"INSPEC-
TION
AFTER
REMOVA
L"
Page 1894 of 3371
ENGINE ROOM COVER
EM-11
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: August 20072004 QX56
ENGINE ROOM COVERPFP:14049
Removal and InstallationEBS00IL9
REMOVAL
Remove the engine cover bolts and cover.
CAUTION:
Do not damage or scratch cover when installing or remov-
ing.
INSTALLATION
Installation is in the reverse order of removal.
WBIA0464E
Page 1895 of 3371

EM-12Revision: August 2007
DRIVE BELTS
2004 QX56
DRIVE BELTSPFP:02117
Checking Drive BeltsEBS00ILA
WAR NIN G:
Be sure to perform when the engine is stopped.
1. Remove the air duct and resonator assembly when inspecting the drive belt. Refer to EM-14, "
Removal
and Installation" .
2. Make sure that the indicator (single line notch) of each auto tensioner is within the allowable working
range (between three line notches).
NOTE:
Check the auto tensioner indication when the engine is cold.
When the new drive belt is installed, the range should be as shown.
The indicator notch is located on the moving side of the auto tensioner.
3. Visually check the entire belt for wear, damage or cracks.
4. If the indicator is out of allowable working range or belt is damaged, replace the belt.
Tension AdjustmentEBS00ILB
Belt tensioning is not necessary, as it is automatically adjusted by the auto tensioner.
Removal and InstallationEBS00ILC
DRIVE BELT
Removal
1. Remove the air duct and resonator assembly. Refer to EM-14, "Removal and Installation" .
2. Install Tool on auto tensioner pulley bolt, move in the direction of
arrow (loosening direction of tensioner) as shown.
CAUTION:
Avoid placing hand in a location where pinching may occur
if the tool accidentally comes off.
3. Remove the drive belt.
LBIA0391E
1. Drive belt 2. Power steering pump pulley 3. Generator pulley
4. Crankshaft pulley 5. A/C compressor 6. Idler pulley
7. Cooling fan pulley 8. Water pump pulley 9. Drive belt tensioner
Tool number : — (J-46535)
WBIA0537E
Page 1896 of 3371
DRIVE BELTS
EM-13
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: August 20072004 QX56
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Make sure belt is securely installed around all pulleys.
Rotate the crankshaft pulley several turns clockwise to equalize belt tension between pulleys.
Make sure belt tension is within the allowable working range, using the indicator notch on the auto ten-
sioner. Refer to EM-12, "
Checking Drive Belts" .
Drive Belt Auto Tensioner and Idler PulleyEBS00ILD
REMOVAL
1. Remove the air duct and resonator assembly. Refer to EM-14, "Removal and Installation" .
2. Remove the drive belt. Refer to EM-12, "
Checking Drive Belts" .
3. Remove the auto tensioner and idler pulley using power tool.
INSTALLATION
Installation is in the reverse order of removal.
WBIA0607E
1. Auto tensioner 2. Idler pulley