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.

Precaution for Drain Engine Coolant

INFOID:0000000001281959

Drain engine coolant when engine is cooled.

Precaution for Disconnecting Fuel Piping

INFOID:0000000001281960

• 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:0000000001281961

• 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:0000000001281962

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

Precaution for Assembly and Installation

INFOID:0000000001281963

• Use torque wrench to tighten bolts or nuts to specification.
• When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the

ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is specified,
do exactly as specified.

• Replace with new gasket, packing, oil seal or O-ring.
• Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for

any restriction and blockage.

• Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.

Before assembly, oil sliding surfaces well.

PRECAUTIONS

EM-5

< PRECAUTION >

[VQ40DE]

• Release air within route when refilling after draining engine coolant.
• Before starting engine, apply fuel pressure to fuel lines with turning ignition switch ON (with engine stopped).

Then make sure that there are no leaks at fuel line connections.

• After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and

exhaust gasses for leakage.

Parts Requiring Angle Tightening

INFOID:0000000001281964

• For the final tightening of the following engine parts use Tool:

- Cylinder head bolts
- Lower cylinder block bolts
- Connecting rod cap bolts
- Crankshaft pulley bolt (No angle wrench is required as bolt flange is provided with notches for angle tighten-

ing)

• Do not use a torque value for final tightening.
• The torque value for these parts are for a preliminary step.
• Ensure thread and seat surfaces are clean and coated with engine oil.

Precaution for Liquid Gasket

INFOID:0000000001281965

REMOVAL OF LIQUID GASKET SEALING

• After removing nuts and bolts, separate the mating surface and

remove old liquid gasket sealing using Tool.

CAUTION:

Be careful not to damage the mating surfaces.

• Tap seal cutter to insert it (1), and then slide it by tapping on the

side (2) as shown.

• In areas where Tool is difficult to use, use plastic hammer to lightly

tap the parts, to remove it.

CAUTION:

If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.

LIQUID GASKET APPLICATION PROCEDURE

Remove the old liquid gasket adhering to the gasket application
surface and the mating surface using suitable tool.
• Remove liquid gasket completely from the groove of the gas-

ket application surface, bolts, and bolt holes.

Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign materials.

Tool number

: KV10112100 (BT-8653-A)

Tool number

: KV10111100 (J-37228)

WBIA0566E

PBIC0003E

EM-6

< PRECAUTION >

[VQ40DE]

PRECAUTIONS

Attach liquid gasket tube to the Tool.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

Apply the liquid gasket without breaks to the specified location
with the specified dimensions.

• If there is a groove for the liquid gasket application, apply the

liquid gasket to the groove.

• As for bolt holes, normally apply the liquid gasket inside the

holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of this manual.

• Within five minutes of liquid gasket application, install the mat-

ing component.

• If the liquid gasket protrudes, wipe it off immediately.
• Do not retighten nuts or bolts after the installation.
• Wait 30 minutes or more after installation, before refilling the

engine with engine oil and engine coolant.

CAUTION:

If there are specific instructions in this manual, observe them.

Tool number

: WS39930000 (

—

)

WBIA0567E

SEM159F

PREPARATION

EM-7

< PREPARATION >

[VQ40DE]

PREPARATION

Special Service Tool

INFOID:0000000001281966

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number
(Kent-Moore No.)
Tool name

Description

ST0501S000
(

—

)

Engine stand assembly
1. ST05011000
(

—

)

Engine stand
2. ST05012000
(

—

)

Base

Disassembling and assembling engine

—

(J-45488)
Quick connector release

Removing fuel tube quick connectors in en-
gine room
(Available in SEC. 164 of PARTS CATALOG:
Part No. 16441 6N210)

KV10111100
(J-37228)
Seal cutter

Removing oil pan (lower and upper), front and
rear timing chain case, etc.

WS39930000
(

—

)

Tube presser

Pressing the tube of liquid gasket

KV991J0050
(J-44626)
Air fuel sensor Socket

Loosening or tightening air fuel ratio A/F sen-
sor
a: 22 mm (0.87 in)

KV10114400
(J-38365)
Heated oxygen sensor wrench

Loosening or tightening heated oxygen sen-
sor 1
a: 22 mm (0.87 in)

NT042

PBIC0198E

NT046

NT052

LBIA0444E

NT636

EM-8

< PREPARATION >

[VQ40DE]

PREPARATION

KV10116200
(J-26336-A)
Valve spring compressor
1. KV10115900
(J-26336-20)
Attachment
2.KV10109220
(

—

)

Adapter

Disassembling valve mechanism
Part (1) is a component of KV10116200 (J-
26336-A), but Part (2) is not so.

KV10107902
(J-38959)
Valve oil seal puller

Replacing valve oil seal

—

(J-39386)
Valve oil seal drift

Installing valve oil seal

EM03470000
(J-8037)
Piston ring compressor

Installing piston assembly into cylinder bore

KV10112100
(BT-8653-A)
Angle wrench

Tightening bolts for bearing cap, cylinder
head, etc. in angle

ST16610001
(J-23907)
Pilot bushing puller

Removing pilot converter

Tool number
(Kent-Moore No.)
Tool name

Description

PBIC1650E

NT011

NT024

NT044

NT014

NT045

PREPARATION

EM-9

< PREPARATION >

[VQ40DE]

Commercial Service Tool

INFOID:0000000001281967

KV991J0120
(J-47128)
Seal installer

Installing rear main seal

KV10117700
(J-44716)
Ring gear stopper

Removing and installing crankshaft pulley

Tool number
(Kent-Moore No.)
Tool name

Description

LBIA0452E

NT822

Tool number
(Kent-Moore No.)
Tool name

Description

(

—

)

Power tool

Loosening nuts and bolts

KV991J0100
(J-46531)
TORX socket

Removing and installing flywheel
Size: T55

(

—

)

Spark plug wrench

Removing and installing spark plug

(J-24239-01)
Cylinder head bolt wrench

Loosening and tightening cylinder head bolt,
and used with angle wrench [SST:
KV10112100 (BT8653-A)]
a: 13 (0.51) dia.
b: 12 (0.47)
c: 10 (0.39)
Unit: mm (in)

PBIC0190E

PBIC1113E

NT047

NT583

EM-10

< PREPARATION >

[VQ40DE]

PREPARATION

(

—

)

Valve seat cutter set

Finishing valve seat dimensions

(

—

)

Piston ring expander

Removing and installing piston ring

(

—

)

Valve guide drift

Removing and installing valve guide
Intake and Exhaust:
a: 9.5 mm (0.374 in) dia.
b: 5.5 mm (0.217 in) dia.

(

—

)

Valve guide reamer

(1): Reaming valve guide inner hole
(2): Reaming hole for oversize valve guide
Intake and Exhaust:
d

: 6.0 mm (0.236 in) dia.

: 10.175 - 10.196 mm (0.4006 - 0.4014 in)

dia.

(J-43897-18)
(J-43897-12)
Oxygen sensor thread cleaner

Reconditioning the exhaust system threads
before installing a new heated oxygen sensor
(Use with anti-seize lubricant shown below.)
a: J-43897-18 [18 mm (0.71 in) dia.] for zir-
conia heated oxygen sensor
b: J-43897-12 [12 mm (0.47 in) dia.] for tita-
nia heated oxygen sensor

(

—

)

Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL specifica-
tion MIL-A-907)

Lubricating oxygen sensor thread cleaning
tool when reconditioning exhaust system
threads

(

—

)

Manual lift table caddy

Removing and installing engine

Tool number
(Kent-Moore No.)
Tool name

Description

NT048

NT030

NT015

NT016

AEM488

AEM489

ZZA1210D

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