Nissan Pathfinder (2008 year). Manual - part 354

FUEL PRESSURE

EC-949

< ON-VEHICLE MAINTENANCE >

[VK56DE]

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8.

If result is unsatisfactory, go to next step.

9.

Check the following.
• Fuel hoses and fuel tubes for clogging
• Fuel filter for clogging
• Fuel pump
• Fuel pressure regulator for clogging
If OK, replace fuel pressure regulator.
If NG, repair or replace.

10. Before disconnecting Fuel Pressure Gauge and Fuel Pressure Adapter J-44321-6, release fuel pressure

to zero. Refer to "FUEL PRESSURE RELEASE".

At idling:

Approximately 350 kPa (3.57 kg/cm

2

, 51 psi)

EC-950

< ON-VEHICLE MAINTENANCE >

[VK56DE]

EVAP LEAK CHECK

EVAP LEAK CHECK

How to Detect Fuel Vapor Leakage

INFOID:0000000001538029

CAUTION:

• Never use compressed air or a high pressure pump.
• Do not exceed 4.12 kPa (0.042 kg/cm

2

, 0.6 psi) of pressure in EVAP system.

NOTE:
• Do not start engine.
• Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.

 WITH CONSULT-III

1.

Attach the EVAP service port adapter securely to the EVAP service port.

2.

Also attach the pressure pump and hose to the EVAP service port adapter.

3.

Turn ignition switch ON.

4.

Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT MODE” with CONSULT-III.

5.

Touch “START”. A bar graph (Pressure indicating display) will appear on the screen.

6.

Apply positive pressure to the EVAP system until the pressure indicator reaches the middle of the bar
graph.

7.

Remove EVAP service port adapter and hose with pressure pump.

8.

Locate the leak using a leak detector. Refer to 

EC-517,

"Description"

.

 WITHOUT CONSULT-III

1.

Attach the EVAP service port adapter securely to the EVAP ser-
vice port (2).

-

EVAP canister purge volume control solenoid valve

-

: Vehicle front

2.

Also attach the pressure pump with pressure gauge to the EVAP
service port adapter.

SEF200U

ALBIA0349ZZ

SEF462UA

EVAP LEAK CHECK

EC-951

< ON-VEHICLE MAINTENANCE >

[VK56DE]

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3.

Apply battery voltage between the terminals of EVAP canister
vent control valve (3) to make a closed EVAP system.

-

Fuel filler pipe (top of frame view) (1)

-

EVAP control system pressure sensor (2)

-

EVAP ccanister (4)

-

Drain filter (5)

-

: Vehicle front

4.

To locate the leak, deliver positive pressure to the EVAP system until pressure gauge points reach 1.38 to
2.76 kPa (0.014 to 0.028 kg/cm

2

, 0.2 to 0.4 psi).

5.

Remove EVAP service port adapter and hose with pressure pump.

6.

Locate the leak using a leak detector. Refer to 

EC-517, "Description"

AWBIA0134ZZ

EC-952

< ON-VEHICLE REPAIR >

[VK56DE]

EVAP CANISTER

ON-VEHICLE REPAIR

EVAP CANISTER

Component Inspection

INFOID:0000000001538030

EVAP CANISTER

Check EVAP canister as follows:

1.

Block port B.

2.

Blow air into port A and check that it flows freely out of port C.

3.

Release blocked port B.

4.

Apply vacuum pressure to port B and check that vacuum pres-
sure exists at the ports A and C.

5.

Block port A and B.

6.

Apply pressure to port C and check that there is no leakage.

Removal and Installation

INFOID:0000000001538031

EVAP CANISTER

Tighten EVAP canister as shown in the figure.

EVAP CANISTER VENT CONTROL VALVE

1.

Turn EVAP canister vent control valve counterclockwise.

2.

Remove the EVAP canister vent control valve.

Always replace O-ring with a new one.

PBIB2568E

 : N-·m (kg-m, in-lb)

BBIA0566E

BBIA0567E

SERVICE DATA AND SPECIFICATIONS (SDS)

EC-953

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Fuel Pressure

INFOID:0000000001538032

Idle Speed and Ignition Timing

INFOID:0000000001538033

*: Under the following conditions:

• Air conditioner switch: OFF

• Electric load: OFF (Lights and heater fan)

• Steering wheel: Kept in straight-ahead position

Calculated Load Value

INFOID:0000000001538034

Mass Air Flow Sensor

INFOID:0000000001538035

*: Engine is warmed up to normal operating temperature and running under no load.

Intake Air Temperature Sensor

INFOID:0000000001538036

Engine Coolant Temperature Sensor

INFOID:0000000001538037

A/F Sensor 1 Heater

INFOID:0000000001538038

Fuel pressure at idling kPa (kg/cm

2

, psi)

Approximately 350 (3.57, 51)

Target idle speed

No-load* (in P or N position)

650

±

50 rpm

Air conditioner: ON

In P or N position

700 rpm or more

Ignition timing

In P or N position

15

°

 

±

 5

°

 BTDC

Condition

Calculated load value % (Using CONSULT-III or GST)

At idle

14.0 - 33.0

At 2,500 rpm

12.0 - 25.0

Supply voltage

Battery voltage (11 - 14V)

Output voltage at idle

1.0 - 1.3V*

Mass air flow (Using CONSULT-III or GST)

3.0 - 9.0 g·m/sec at idle*

9.0 - 28.0 g·m/sec at 2,500 rpm*

Temperature 

°

C (

°

F)

Resistance k

Ω

25 (77)

1.800 - 2.200

Temperature 

°

C (

°

F)

Resistance k

Ω

20 (68) 

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

Resistance [at 25

°

C (77

°

F)]

1.98 - 2.66

Ω

EC-954

< SERVICE DATA AND SPECIFICATIONS (SDS) 

[VK56DE]

SERVICE DATA AND SPECIFICATIONS (SDS)

Heated Oxygen sensor 2 Heater

INFOID:0000000001538039

Crankshaft Position Sensor (POS)

INFOID:0000000001538040

Refer to 

EC-683, "Component Inspection"

.

Camshaft Position Sensor (PHASE)

INFOID:0000000001538041

Refer to 

EC-687, "Component Inspection"

.

Throttle Control Motor

INFOID:0000000001538042

Fuel Injector

INFOID:0000000001538043

Fuel Pump

INFOID:0000000001538044

Resistance [at 25

°

C (77

°

F)]

8 - 10

Ω

Resistance [at 25

°

C (77

°

F)]

Approximately 1 - 15

Ω

Resistance [at 10 - 60

°

C (50 - 140

°

F)]

11.1 - 14.5

Ω

Resistance [at 25

°

C (77

°

F)]

0.2 - 5.0

Ω

EM-1

ENGINE

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SECTION 

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CONTENTS

ENGINE MECHANICAL

VQ40DE

PRECAUTION ...............................................

4

PRECAUTIONS ...................................................

4

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................

4

Precaution for Drain Engine Coolant .........................

4

Precaution for Disconnecting Fuel Piping  .................

4

Precaution for Removal and Disassembly  ................

4

Precaution for Inspection, Repair and Replace-
ment ..........................................................................

4

Precaution for Assembly and Installation  ..................

4

Parts Requiring Angle Tightening  .............................

5

Precaution for Liquid Gasket .....................................

5

PREPARATION ............................................

7

PREPARATION ...................................................

7

Special Service Tool  .................................................

7

Commercial Service Tool  ..........................................

9

FUNCTION DIAGNOSIS ..............................

11

NOISE, VIBRATION AND HARSHNESS 
(NVH) TROUBLESHOOTING  ............................

11

NVH Troubleshooting - Engine Noise  .....................

11

Use the Chart Below to Help You Find the Cause 
of the Symptom  .......................................................

11

ON-VEHICLE MAINTENANCE ....................

13

DRIVE BELTS  ....................................................

13

Checking Drive Belts ...............................................

13

Tension Adjustment  ................................................

13

Removal and Installation .........................................

13

Drive Belt Auto Tensioner and Idler Pulley  .............

14

AIR CLEANER FILTER ......................................

15

Changing Air Cleaner Filter  .....................................

15

SPARK PLUG  ...................................................

16

Changing Spark Plugs .............................................

16

CAMSHAFT VALVE CLEARANCE  ..................

18

Valve Clearance  ......................................................

18

COMPRESSION PRESSURE  ...........................

22

Compression Pressure  ............................................

22

ON-VEHICLE REPAIR .................................

24

ENGINE ROOM COVER  ...................................

24

Removal and Installation  .........................................

24

AIR CLEANER AND AIR DUCT  .......................

25

Removal and Installation  .........................................

25

INTAKE MANIFOLD COLLECTOR  ..................

26

Removal and Installation  .........................................

26

INTAKE MANIFOLD  .........................................

29

Removal and Installation  .........................................

29

EXHAUST MANIFOLD AND THREE WAY 
CATALYST ........................................................

31

Removal and Installation  .........................................

31

OIL PAN AND OIL STRAINER  .........................

36

Removal and Installation  .........................................

36

IGNITION COIL  .................................................

41

Removal and Installation  .........................................

41

ROCKER COVER  .............................................

42

Removal and Installation  .........................................

42

FUEL INJECTOR AND FUEL TUBE  ................

47

Removal and Installation  .........................................

47

FRONT TIMING CHAIN CASE  .........................

52

Removal and Installation  .........................................

52

TIMING CHAIN ..................................................

61

Removal and Installation  .........................................

61

EM-2

CAMSHAFT .......................................................

81

Removal and Installation  ........................................

81

OIL SEAL ...........................................................

90

Removal and Installation of Valve Oil Seal .............

90

Removal and Installation of Front Oil Seal  .............

90

Removal and Installation of Rear Oil Seal  ..............

91

CYLINDER HEAD  ..............................................

93

Removal and Installation  ........................................

93

Disassembly and Assembly ....................................

96

Inspection After Disassembly  .................................

98

REMOVAL AND INSTALLATION ..............

103

ENGINE ASSEMBLY .......................................

103

Removal and Installation  .......................................

103

DISASSEMBLY AND ASSEMBLY  ............

106

ENGINE UNIT  ..................................................

106

Disassembly and Assembly ...................................

106

Inspection After Disassembly  ................................

117

HOW TO SELECT PISTON AND BEARING ...

127

How to Select Piston and Bearing  .........................

127

SERVICE DATA AND SPECIFICATIONS 
(SDS) ..........................................................

132

SERVICE DATA AND SPECIFICATIONS 
(SDS) ................................................................

132

Standard and Limit  ................................................

132

VK56DE

PRECAUTION ............................................

143

PRECAUTIONS  ...............................................

143

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ................................................................

143

Precaution for Drain Engine Coolant  .....................

143

Precaution for Disconnecting Fuel Piping ..............

143

Precaution for Removal and Disassembly .............

143

Precaution for Inspection, Repair and Replace-
ment .......................................................................

143

Precaution for Assembly and Installation  ..............

143

Parts Requiring Angular Tightening .......................

144

Precaution for Liquid Gasket  .................................

144

PREPARATION ..........................................

146

PREPARATION  ...............................................

146

Special Service Tool  ..............................................

146

Commercial Service Tool  ......................................

148

FUNCTION DIAGNOSIS  ............................

150

NOISE, VIBRATION, AND HARSHNESS 
(NVH) TROUBLESHOOTING  ..........................

150

NVH Troubleshooting - Engine Noise ....................

150

Use the Chart Below to Help You Find the Cause 
of the Symptom .....................................................

151

ON-VEHICLE MAINTENANCE .................

153

DRIVE BELTS  ..................................................

153

Checking Drive Belts .............................................

153

Removal and Installation .......................................

153

Drive Belt Auto Tensioner and Idler Pulley  ...........

154

AIR CLEANER FILTER  ....................................

155

Removal and Installation .......................................

155

SPARK PLUG ...................................................

156

Removal and Installation .......................................

156

CAMSHAFT VALVE CLEARANCE  .................

158

Valve Clearance ....................................................

158

COMPRESSION PRESSURE  ..........................

163

Compression Pressure  .........................................

163

ON-VEHICLE REPAIR  ..............................

164

ENGINE ROOM COVER  ..................................

164

Removal and Installation .......................................

164

AIR CLEANER AND AIR DUCT .......................

165

Removal and Installation .......................................

165

INTAKE MANIFOLD  .........................................

166

Removal and Installation .......................................

166

EXHAUST MANIFOLD AND THREE WAY 
CATALYST .......................................................

170

Removal and Installation .......................................

170

OIL PAN AND OIL STRAINER  ........................

173

Removal and Installation .......................................

173

IGNITION COIL .................................................

177

Removal and Installation .......................................

177

ROCKER COVER .............................................

178

Removal and Installation .......................................

178

FUEL INJECTOR AND FUEL TUBE ................

180

Removal and Installation .......................................

180

TIMING CHAIN  .................................................

184

Components ..........................................................

184

Removal and Installation .......................................

185

CAMSHAFT ......................................................

193

Components ..........................................................

193

Removal and Installation .......................................

193

Inspection after Installation  ...................................

202

OIL SEAL ..........................................................

204

Removal and Installation of Valve Oil Seal  ...........

204

Removal and Installation of Front Oil Seal ............

204

Removal and Installation of Rear Oil Seal  ............

206