maintenance INFINITI QX56 2008 Factory Owner's Manual

ENGINE COOLANTCO-11
< ON-VEHICLE MAINTENANCE >
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Changing Engine CoolantINFOID:0000000001538859
WARNING:
• To avoid being scalded, never change the coolant when the engine is hot.
• Wrap a thick cloth around the cap to carefully remo
ve the cap. First, turn the cap a quarter of a turn
to release any built-up pressure, then push down and turn the cap all the way to remove it.
DRAINING ENGINE COOLANT
1. Turn ignition switch ON and set temperature control lever all the way to HOT position or the highest tem-
perature position. Wait 10 seconds and turn ignition switch OFF.
2. Remove the engine front undercover using power tool.
3. Open the radiator drain plug at the bottom of the radiator, and remove the radiator filler cap. This is the only step required
when partially draining the cooling system (radiator only).
CAUTION:
Do not to allow the coolant to contact the drive belts.
4. When draining all of the coolant in the system for engine removal or repair, it is necessary to drain the cylinder block.
Remove the RH cylinder block drain plug to drain the right bank
and the oil cooler hose to drain the left bank as shown.
5. Remove the reservoir tank to drain the engine cool ant, then clean the reservoir tank before installing it.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration. If the coolant is contaminated, flush the engine cooling system. Refer to CO-11, "
Changing Engine Cool-
ant".
REFILLING ENGINE COOLANT
1. Close the radiator drain plug. Install the reservoir tank, cylinder block drain plug, and the oil cooler hose, if
removed for a total system drain or for engine removal or repair.
• The radiator must be complete ly empty of coolant and water.
• Apply sealant to the threads of the cylinder block drain plug. Use Genuine High Performance Thread Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Products and Sealants".
WBIA0391E
PBIC0146E
WBIA0392E
Revision: March 2010 2008 QX56

CO-12
< ON-VEHICLE MAINTENANCE >
ENGINE COOLANT
2. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with
the engine OFF as necessary to activate the heater mode.
3. Remove the vented reservoir cap and replace it with a non-vented reservoir cap before filling the cooling
system.
4. Install the Tool by installing the radiator cap adapter onto the radiator neck opening. Then attach the gauge body assembly
with the refill tube and the venturi assembly to the radiator cap
adapter.
5. Insert the refill hose into the coolant mixture container that is placed at floor level. Make sure the ball valve is in the closed
position.
• Use Genuine NISSAN Long Life Anti-freeze coolant or equiva-lent, mixed 50/50 with distilled water or demineralized water.
Refer to MA-12, "
Fluids and Lubricants".
6. Install an air hose to the venturi assembly, the air pressure must be within specification.
CAUTION:
The compressed air supply must be equipped with an air
dryer.
7. The vacuum gauge will begin to rise and there will be an audible hissing noise. During this process open the ball valve on the refill hose slightly. Coolant will be vi sible rising in the refill hose. Once the refill hose is
full of coolant, close the ball valve. This will purge any air trapped in the refill hose.
8. Continue to draw the vacuum until the gauge reaches 28 inches of vacuum. The gauge may not reach 28 inches in high altitude
locations, use the vacuum specifications based on the altitude
above sea level.
9. When the vacuum gauge has reached the specifi ed amount, disconnect the air hose and wait 20 seconds
to see if the system loses any vacuum. If the vacuum level drops, perform any necessary repairs to the
system and repeat steps 6 - 8 to bring the vacuum to the specified amount. Recheck for any leaks.
10. Place the coolant container (with the refill hose insert ed) at the same level as the top of the radiator. Then
open the ball valve on the refill hose so the coolant will be drawn up to fill the cooling system. The cooling
system is full when the vacuum gauge reads zero.
CAUTION:
Do not allow the coolant container to get too low when filling, to avoid air from being drawn into
the cooling system.
11. Remove the Tool from the radiator neck opening and install the radiator cap. Radiator drain plug
: Refer to CO-11
.
RH cylinder block drain plug : Refer to EM-82
.
Tool number : KV991J0070 (J-45695)
Cooling system capacity
(with reservoir) : Refer to
MA-12, "
Fluids
and Lubricants".
Compressed air
supply pressure : 5.7 - 8.5 kPa (5.6 - 8.4 kg/cm
2, 80
- 120 psi)
LLIA0058E
Altitude above sea level Vacuum gauge reading
0 - 100 m (328 ft) : 28 inches of vacuum
300 m (984 ft) : 27 inches of vacuum
500 m (1,641 ft) : 26 inches of vacuum
1,000 m (3,281 ft) : 24 - 25 inches of vacuum
LLIA0057E
Revision: March 2010 2008 QX56

ENGINE COOLANTCO-13
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12. Remove the non-vented reservoir cap.
13. Fill the cooling system reservoir tank to the specified level. Run the engine to warm up the cooling system
and top up the system as necessary befor e installing the vented reservoir cap.
FLUSHING COOLING SYSTEM
1. Drain the water from the engine cooling system. Refer to CO-11, "Changing Engine Coolant".
2. Fill the radiator and the reservoir tank (to the “MAX” line), with water. Reinstall the radiator cap and leave
the vented reservoir cap off.
3. Run the engine until it reaches normal operating temperature.
4. Press the engine accelerator two or three times under no-load.
5. Stop the engine and wait until it cools down.
6. Drain the water from the engine cooling system. Refer to CO-11, "
Changing Engine Coolant".
7. Repeat steps 2 through 6 until clear water begins to drain from the radiator.
Revision: March 2010 2008 QX56

CO-14
< ON-VEHICLE MAINTENANCE >
RADIATOR
RADIATOR
Checking RadiatorINFOID:0000000001538860
Check radiator for mud or clogging. If necessary, clean radiator as follows.
CAUTION:
• Be careful not to bend or damage the radiator fins.
• When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radia-tor shroud and horns. Then tape the harness and electrical connectors to prevent water from enter-
ing.
1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surfaces.
3. Stop washing when dirt and debris no longer flow out from the radiator.
4. Blow air into the back side of radiator core vertically downward. • Use compressed air lower than 490 kPa (5 kg/cm
2, 71 psi) and keep distance more than 30 cm (11.8 in).
5. Blow air again into all the radiator core surfaces until no water sprays out.
Revision: March 2010 2008 QX56

PRECAUTIONSDEF-31
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004894308
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000004894309
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56

PRECAUTIONSDLK-219
< PRECAUTION > [WITH INTELLIGENT KEY SYSTEM]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004884149
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000004884151
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56

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PRECAUTIONS .............................................. ..118
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
118
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ..
118
Precaution for Transfer Assembly and Transfer
Control Unit Replacement .....................................
119
Precaution .............................................................119
Service Notice .......................................................120
PREPARATION .........................................121
PREPARATION .............................................. ..121
Special Service Tool ........................................... ..121
Commercial Service Tool ......................................124
ON-VEHICLE MAINTENANCE ..................125
TRANSFER OIL FILTER ................................ ..125
Removal and Installation .......................................125
TRANSFER FLUID ......................................... ..127
Replacement ....................................................... ..127
Inspection ..............................................................127
ON-VEHICLE REPAIR ...............................128
TRANSFER CONTROL UNIT ........................ ..128
Removal and Installation .......................................128
FRONT OIL SEAL ............................................129
Removal and Installation .......................................129
REAR OIL SEAL ..............................................131
Removal and Installation .......................................131
SIDE OIL SEAL .............................................. ..133
Removal and Installation .......................................133
TRANSFER CONTROL DEVICE ................... ..134
Removal and Installation .......................................134
AIR BREATHER HOSE .................................. ..135
Removal and Installation .......................................135
TRANSFER MOTOR ...................................... ..138
Removal and Installation .......................................138
REMOVAL AND INSTALLA TION .............139
TRANSFER ASSEMBLY ............................... ..139
Removal and Installation .......................................139
DISASSEMBLY AND ASSEMBLY ........... .140
TRANSFER ASSEMBLY ............................... ..140
Disassembly and Assembly ................................ ..140
SERVICE DATA AND SPECIFICATIONS
(SDS) ......... ................................. ................
177
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
177
General Specification .......................................... ..177
Inspection and Adjustment ....................................177
PROPELLER SHAFT: 2F1310
PRECAUTION ...... ......................................
179
PRECAUTIONS ...............................................179
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
179
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
179
PREPARATION .........................................181
PREPARATION ...............................................181
Commercial Service Tool .................................... ..181
SYMPTOM DIAGNOSIS ............................182
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING .........................
182
NVH Troubleshooting Chart ................................ ..182
ON-VEHICLE REPAIR ...............................183
PROPELLER SHAFT ......................................183
On-Vehicle Service .............................................. ..183
REMOVAL AND INSTALLATION .............184
PROPELLER SHAFT ......................................184
Removal and Installation ..................................... ..184
DISASSEMBLY AND ASSEMBLY ............186
PROPELLER SHAFT ......................................186
Disassembly and Assembly ................................. ..186
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... .
188
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
188
General Specification .......................................... ..188
Snap Ring ..............................................................188
PROPELLER SHAFT: 2S1410
PRECAUTION ...... ......................................
189
PRECAUTIONS ...............................................189
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
189
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
189
PREPARATION .........................................191
PREPARATION ...............................................191
Revision: March 2010 2008 QX56

DLN-4
Commercial Service Tool ......................................191
SYMPTOM DIAGNOSIS ............................192
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
192
NVH Troubleshooting Chart ................................ ..192
ON-VEHICLE REPAIR ...............................193
PROPELLER SHAFT ..................................... .193
On-Vehicle Service .............................................. ..193
REMOVAL AND INSTALLATION ..............194
PROPELLER SHAFT ..................................... .194
Removal and Installation ..................................... ..194
DISASSEMBLY AND ASSEMBLY ............197
PROPELLER SHAFT ..................................... .197
Disassembly and Assembly ................................. ..197
SERVICE DATA AND SPECIFICATIONS
(SDS) ........................................................ ..
199
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
199
General Specification .......................................... ..199
Snap Ring ..............................................................200
FRONT FINAL DRIVE: M205
PRECAUTION .............. ..............................
201
PRECAUTIONS .............................................. .201
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ..
201
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
201
Precaution for Servicing Front Final Drive .............202
PREPARATION ..........................................203
PREPARATION .............................................. .203
Special Service Tool ............................................ ..203
Commercial Service Tool ......................................205
SYMPTOM DIAGNOSIS ............................206
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
206
NVH Troubleshooting Chart ................................ ..206
ON-VEHICLE MAINTENANCE ..................207
DIFFERENTIAL GEAR OIL ............................ .207
Changing Differential Gear Oil ...............................207
Checking Differential Gear Oil ............................. ..207
ON-VEHICLE REPAIR ...............................208
SIDE OIL SEAL .............................................. ..208
Removal and Installation .......................................208
FRONT OIL SEAL ............................................209
Removal and Installation .......................................209
CARRIER COVER .......................................... ..211
Removal and Installation .......................................211
REMOVAL AND INSTALLA TION .............212
FRONT FINAL DRIVE .................................... ..212
Removal and Installation .......................................212
DISASSEMBLY AND ASSEMBLY ...........214
FRONT FINAL DRIVE .................................... ..214
Disassembly and Assembly ................................. .214
SERVICE DATA AND SPECIFICATIONS
(SDS) ........ .................................................
231
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
231
General Specification ........................................... .231
Inspection and Adjustment ....................................231
REAR FINAL DRIVE: R230
PRECAUTION ............... ............................
233
PRECAUTIONS .............................................. ..233
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
233
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
233
Precaution for Servicing Rear Final Drive .............234
PREPARATION .........................................235
PREPARATION .............................................. ..235
Special Service Tool ............................................ .235
Commercial Service Tool ......................................239
SYMPTOM DIAGNOSIS ...........................240
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
240
NVH Troubleshooting Chart ..................................240
DESCRIPTION ................................................ ..241
Cross-Sectional View ........................................... .241
ON-VEHICLE MAINTENANCE .................242
DIFFERENTIAL GEAR OIL ..............................242
Changing Differential Gear Oil ............................. .242
Checking Differential Gear Oil ..............................242
ON-VEHICLE REPAIR ..............................243
FRONT OIL SEAL ............................................243
Revision: March 2010 2008 QX56

DLN-118
< PRECAUTION >[ATX14B]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint Syst
em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004857590
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000004857589
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56

TRANSFER OIL FILTERDLN-125
< ON-VEHICLE MAINTENANCE > [ATX14B]
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ON-VEHICLE MAINTENANCE
TRANSFER OIL FILTER
Removal and InstallationINFOID:0000000001604409
REMOVAL
1. Remove the oil filter bolts and oil filter. CAUTION:
• Do not damage center case or oil filter.
• Loosen bolts and detach oil filter evenly.
2. Remove the O-rings (1) from the oil filter (2).
3. Remove the oil filter stud from the oil filter.
4. Remove the O-ring from the oil filter stud.
INSTALLATION
1. Apply ATF to the new O-ring, and install it on the oil filter stud. CAUTION:
Do not reuse O-ring.
2. Install the oil filter stud to the oil filter.
SMT875C
WDIA0285E
SDIA3180E
SDIA3180E
Revision: March 2010 2008 QX56