Nissan Frontier. Manual

EM-2

INTAKE VALVE TIMING CONTROL .................

Intake Valve Timing Control Solenoid Valve ..........

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

Exploded View ........................................................

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

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

Exploded View ........................................................

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

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

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

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

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

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

Exploded View ........................................................

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

Exploded View ........................................................

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

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

UNIT REMOVAL AND INSTALLATION .....

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

Exploded View ........................................................

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

UNIT DISASSEMBLY AND ASSEMBLY ....

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

Exploded View ........................................................

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

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

HOW TO SELECT PISTON AND BEARING ...

101

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

101

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

108

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

108

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

108

VQ40DE

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

119

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

119

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

119

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

119

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

119

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

119

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

119

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

120

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

120

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

120

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

122

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

122

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

122

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

124

SYSTEM DESCRIPTION ..........................

127

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

127

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

127

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

127

PERIODIC MAINTENANCE ......................

129

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

129

Exploded View ......................................................

129

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

129

Adjustment ............................................................

129

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

129

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

130

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

131

Exploded View ......................................................

131

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

131

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

132

Exploded View ......................................................

132

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

132

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

134

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

134

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

138

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

138

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

140

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

140

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

140

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

141

Exploded View ......................................................

141

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

141

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

142

Exploded View ......................................................

142

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

142

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

145

Exploded View ......................................................

145

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

145

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

147

Exploded View ......................................................

147

Removal and Installation (Three Way Catalyst) ....

147

Removal and Installation (Exhaust Manifold) ........

148

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

151

Exploded View ......................................................

151

EM-4

< PRECAUTION >

[QR25DE]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

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

INFOID:0000000010149728

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 SR and SB section of this Service Man-

ual.

WARNING:

• 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 performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• 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 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 electric 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 three minutes before performing any service.

Precaution for Drain Engine Coolant

INFOID:0000000009478028

Drain engine coolant when engine is cooled.

Precaution for Disconnecting Fuel Piping

INFOID:0000000009478029

• Before starting work, make sure no fire or spark producing items are in the work area.

• Release fuel pressure before disconnecting and disassembly.

• After disconnecting pipes, plug openings to stop fuel leakage.

Precaution for Removal and Disassembly

INFOID:0000000009478030

• When instructed to use special service tools, use the specified tools. Always be careful to work safely, avoid

forceful or uninstructed operations.

• Exercise maximum care to avoid damage to mating or sliding surfaces.

• Cover openings of engine system with tape or equivalent, if necessary, to seal out foreign materials.

• Mark and arrange disassembly parts in an organized way for easy troubleshooting and re-assembly.

• When loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally

opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be used

in the step.

Precaution for Inspection, Repair and Replacement

INFOID:0000000009478031

Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and

replace if necessary.

Nissan Frontier. Manual - part 703