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B ENGINE

LU
SECTION
ENGINE LUBRICATION SYSTEM C

E
CONTENTS
PRECAUTIONS ......................................................... 2. OIL COOLER ........................................................... 11
. F
Precautions for Supplemental Restraint System Removal and Installation ....................................... 11 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- REMOVAL .......................................................... 11
.
SIONER" ................................................................. 2
. INSPECTION AFTER REMOVAL ...................... 12 . G
Precautions for Liquid Gasket ................................. 2 . INSTALLATION .................................................. 12 .
LIQUID GASKET APPLICATION PROCEDURE 2 ..... INSPECTION AFTER INSTALLATION ............... 12 .
PREPARATION .......................................................... 4
. OIL PUMP ................................................................ 13
.
H
Special Service Tools .............................................. 4. Removal and Installation ....................................... 13 .
Commercial Service Tools ....................................... 4 . REMOVAL .......................................................... 13
.
LUBRICATION SYSTEM ........................................... 5 . INSTALLATION .................................................. 13 .
Lubrication Circuit ................................................... 5
. INSPECTION AFTER INSTALLATION ............... 13 . I
System Chart .......................................................... 6
. Disassembly and Assembly ................................... 13 .
ENGINE OIL .............................................................. 7
. DISASSEMBLY .................................................. 13 .
Inspection ................................................................ 7
. INSPECTION AFTER DISASSEMBLY ............... 14 . J
ENGINE OIL LEVEL ............................................ 7 . ASSEMBLY ........................................................ 15
.
ENGINE OIL APPEARANCE ............................... 7 . SERVICE DATA AND SPECIFICATIONS (SDS) ..... 16 .
ENGINE OIL LEAKAGE ....................................... 7 . Standard and Limit ................................................. 16
.
K
OIL PRESSURE CHECK ..................................... 8 . OIL PRESSURE ................................................. 16 .
Changing Engine Oil ............................................... 9 . OIL CAPACITY (APPROXIMATE) ...................... 16 .
OIL FILTER .............................................................. 10
. OIL PUMP .......................................................... 16
.
Changing Oil Filter ................................................ 10
. REGULATOR VALVE ......................................... 16 . L

Revision: September 2005 LU-1 2006 Pathfinder
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EBS00T2H

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 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 whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
q To avoid rendering the SRS inoperative, 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 per-
formed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Liquid Gasket EBS00QCE

LIQUID GASKET APPLICATION PROCEDURE
1. Remove old liquid gasket adhering to the liquid gasket applica-
tion surface and the mating surface, Using scraper.
q Remove liquid gasket completely from the groove of the liquid
gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign materials.

PBIC0003E

3. Attach liquid gasket tube to Tool.
Tool number : WS39930000 ( -- )
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-47, "Recommended Chemical Products and Sealants" .
4. Apply liquid gasket without breaks to the specified location with
the specified dimensions.
q If there is a groove for the liquid gasket application, apply liq-
uid gasket to the groove.

WBIA0567E

Revision: September 2005 LU-2 2006 Pathfinder
PRECAUTIONS

q As for the bolt holes, normally apply liquid gasket inside the
holes. Occasionally, it should be applied outside the holes. A
Make sure to read the text of service manual.
q Within five minutes of liquid gasket application, install the mat-
ing component. LU
q If liquid gasket protrudes, wipe it off immediately.

q Do not retighten nuts or bolts after the installation.

q After 30 minutes or more have passed from the installation, fill C
engine oil and engine coolant.
CAUTION: SEM159F
If there are specific instructions in this manual, observe them. D

Revision: September 2005 LU-3 2006 Pathfinder
PREPARATION

PREPARATION PFP:00002

Special Service Tools EBS00QCF

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description
(Kent-Moore No.)
Tool name
ST25051001 Measuring oil pressure
(J-25695-1) Maximum measuring range: 2,452 kPa (25
Oil pressure gauge kg/cm2 , 356 psi)

NT050

ST25052000 Adapting oil pressure gauge to oil pan (upper)
(J-25695-2)
Hose

S-NT559

KV10115801 Removing oil filter
(J-38956) a: 64.3 mm (2.531 in)
Oil filter wrench

S-NT375

WS39930000 Pressing the tube of liquid gasket
( -- )
Tube presser

NT052

Commercial Service Tools EBS00QCG

Tool name Description
Power tool Loosening nuts and bolts

PBIC0190E

Deep socket Removing and installing oil pressure sensor
a: 24 mm (0.94 in)

PBIC2072E

Revision: September 2005 LU-4 2006 Pathfinder
LUBRICATION SYSTEM

LUBRICATION SYSTEM PFP:15010
A
Lubrication Circuit EBS00QCH

PBIC2821E

Revision: September 2005 LU-5 2006 Pathfinder
LUBRICATION SYSTEM

System Chart EBS00QCI

PBIC2822E

Revision: September 2005 LU-6 2006 Pathfinder
ENGINE OIL

ENGINE OIL PFP:KLA92
A
Inspection EBS00QCJ

ENGINE OIL LEVEL
Before starting the engine make sure the vehicle is parked on a flat and level surface, then check the oil level. LU
If the engine is already running, turn it off and allow 10 minutes before checking.
1. Pull out oil level gauge and wipe it clean.
2. Insert oil level gauge and make sure the engine oil level is within C
the range as indicated on gauge.
3. If the engine oil is out of range, add oil as necessary.
D

PBIC2823E
F
ENGINE OIL APPEARANCE
q Check engine oil for white milky or excessive contamination.
q If engine oil becomes milky, it is highly probable that it is contaminated with engine coolant. Repair or G
replace damaged parts.
ENGINE OIL LEAKAGE H
Check for oil leakage around the following areas:
q Oil pans (lower and upper)
q Oil pan drain plug I
q Oil pressure sensor
q Oil filter
q Oil cooler J
q Water pump cover
q Chain tensioner cover
K
q Intake valve timing control cover and intake valve timing control solenoid valve
q Mating surface between cylinder block and cylinder head
q Mating surface between lower cylinder block and cylinder block L
q Mating surface between cylinder head and rocker cover
q Mating surface between front timing chain case and rear timing chain case
q Mating surface between rear timing chain case and cylinder head M
q Mating surface between rear timing chain case and cylinder block
q Mating surface between rear timing chain case and lower cylinder block
q Mating surface between rear timing chain case and oil pan (upper)
q Crankshaft oil seals (front and rear)
q Oil level gauge guide
q Camshaft position sensor (PHASE)

Revision: September 2005 LU-7 2006 Pathfinder
ENGINE OIL

OIL PRESSURE CHECK
WARNING:
q Be careful not to burn yourself, as engine oil may be hot.
q Oil pressure check should be done in "Parking position" (A/T models).
1. Check engine oil level. Refer to LU-7, "ENGINE OIL LEVEL" .
2. Remove undercover with power tool.
3. Disconnect oil pressure sensor harness connector.
4. Disconnect harness connector at oil pressure sensor, and
remove oil pressure sensor.
CAUTION:
Do not drop or shock oil pressure sensor.

LBIA0424E

5. Install Tools.
Tool numbers : ST25051001 (J-25695-1)
: ST25052000 (J-25695-2)

WBIA0571E

6. Start engine and warm it up to normal operating temperature.
7. Check oil pressure with engine running under no-load.
NOTE:
When engine oil temperature is low, engine oil pressure becomes high.
Engine oil pressure [Engine oil temperature at 80

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