Infiniti QX56 (Z62). Manual - part 641

EM-4

< PRECAUTION >

PRECAUTIONS

If turning the steering wheel is required with the battery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.

OPERATION PROCEDURE

Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.

Turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)

Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.

Perform the necessary repair operation.

When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)

Perform self-diagnosis check of all control units using CONSULT-III.

Precaution for Drain Engine Coolant and Engine Oil

INFOID:0000000006289509

Drain engine coolant and engine oil when engine is cooled.

Precaution for Disconnecting Fuel Piping

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• Before starting work, check 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 Handling High Pressure Fuel System

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• High pressure fuel system components are between high pressure fuel pump and fuel injector.
• Always release fuel pressure and never start the engine when performing removal and installation.
• When removing or installing parts without releasing fuel pressure, fuel may be splashed and, if fuel contacts

skin or eyes, it may cause inflammation.

Precaution for Removal and Disassembly

INFOID:0000000006289512

• When instructed to use SST, use specified tools. Always be careful to work safely, avoid forceful or unin-

structed operations.

• Exercise maximum care to avoid damage to mating or sliding surfaces.
• Cover openings of engine system with tape or the equivalent, if necessary, to seal out foreign materials.
• Mark and arrange disassembly parts in an organized way for easy troubleshooting and 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
where noted in the step.

Precaution for Inspection, Repair and Replacement

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

Precaution for Assembly and Installation

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• 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.

• Dowel pins are used for several parts alignment. When replacing and reassembling parts with dowel pins,

check that dowel pins are installed in the original position.

PRECAUTIONS

EM-5

< PRECAUTION >

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

Before assembly, oil sliding surfaces well.

• Release air within route when refilling after draining engine coolant.
• After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and

exhaust gases for leakage.

Parts Requiring Angle Tightening

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• Use angle wrench [SST: KV10112100 (BT8653-A)] for the final tightening of the following engine parts:
- Cylinder head bolts
- Main bearing cap bolts
- Main bearing cap sub bolts
- Connecting rod cap bolts
- Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angle

tightening)

• Ensure thread and seat surfaces are clean and coated with engine oil.

Precaution for Liquid Gasket

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REMOVAL OF LIQUID GASKET SEALING

• After removing mounting nuts and bolts, separate the mating sur-

face using the seal cutter [SST:KV10111100 (J-37228)] (A) and
remove old liquid gasket sealing.

CAUTION:

Be careful not to damage the mating surfaces.

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

on the side as shown in the figure.

• In areas where the seal cutter is difficult to use, lightly tap the parts

using a plastic hammer to remove it.

CAUTION:

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

LIQUID GASKET APPLICATION PROCEDURE

Using a scraper (A), remove old liquid gasket adhering to the liq-
uid gasket application surface and the mating surface.
• Remove liquid gasket completely from the groove of the liquid

gasket application surface, mounting bolts and bolt holes.

Wipe the liquid gasket application surface and the mating sur-
face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.

Attach liquid gasket tube to the tube presser (commercial ser-
vice tool).
Use Genuine RTV Silicone Sealant or equivalent. Refer to

Apply liquid gasket without gaps to the specified location accord-
ing to the specified dimensions.
• If there is a groove for liquid gasket application, apply liquid

gasket to the groove.

JPBIA0052ZZ

JPBIA0053ZZ

EMA0622D

EM-6

< PRECAUTION >

PRECAUTIONS

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

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

• Within 5 minutes of liquid gasket application, install the mating

component.

• If liquid gasket protrudes, wipe it off immediately.
• Do not retighten mounting bolts or nuts after the installation.
• After 30 minutes or more have passed from the installation, fill

engine oil and engine coolant.

CAUTION:

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

Definitions of Bank Names

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• In this manual, each bank name is defined as per the following:

• For cylinder numbers and bank layout, refer to the figure.

: Groove

: Inside

JPBIA0010ZZ

: Bank 2 (The conventional right bank)

: Bank 1 (The conventional left bank)

: Engine front

Bank 1

: The bank side including cylinder No. 1
(odd-numbered cylinder side)

Bank 2

: The other bank side of the above
(even-numbered cylinder side)

JPBIA2064ZZ

PREPARATION

EM-7

< PREPARATION >

PREPARATION

Special Service Tool

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Tool number
(Kent-Moore No.)
Tool name

Description

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
(J26336-A), but part (2) is not so.

KV10107902
(J-38959)
Valve oil seal puller

Removing valve oil seal

KV10115600
(J-38958)
Valve oil seal drift

Installing valve oil seal
Use side A (G)
a: 20 (0.79) dia.          d: 8 (0.31) dia.
b: 13 (0.51) dia.           e: 10.7 (0.421)
c: 10.3 (0.406) dia.         f: 5 (0.20)
H: Side B
                                              Unit: mm (in)

EM03470000
(J-8037)
Piston ring compressor

Installing piston assembly into cylinder bore

KV10111100
(J-37228)
Seal cutter

Removing steel oil pan and front cover

KV10112100
(BT8653-A)
Angle wrench

Tightening bolts for bearing cap, cylinder
head, etc.

PBIC1650E

S-NT011

JPBIA0396ZZ

S-NT044

S-NT046

S-NT014

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