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Nissan Frontier. Manual - part 732

SERVICE DATA AND SPECIFICATIONS (SDS)

EM-117

< SERVICE DATA AND SPECIFICATIONS (SDS)

[QR25DE]

Unit: mm (in)

*: Always check with the Parts Department for the latest parts information.

Undersize

Unit: mm (in)

Bearing Oil Clearance

Unit: mm (in)

CONNECTING ROD BEARING

Grade number*

Thickness

Identification color

Remarks

1.973 - 1.976 (0.0777 - 0.0778)

Black

Grade and color are the same
for upper and lower bearings.

1.976 - 1.979 (0.0778 - 0.0779)

Brown

1.979 - 1.982 (0.0779 - 0.0780)

Green

1.982 - 1.985 (0.0780 - 0.0781)

Yellow

1.985 - 1.988 (0.0781 - 0.0783)

Blue

1.988 - 1.991 (0.0783 - 0.0784)

Pink

1.991 - 1.994 (0.0784 - 0.0785)

Purple

1.994 - 1.997 (0.0785 - 0.0786)

White

UPR

1.973 - 1.976 (0.0777 - 0.0778)

Black

Grade and color are different
for upper and lower bearings.

LWR

1.976 - 1.979 (0.0778 - 0.0779)

Brown

UPR

1.976 - 1.979 (0.0778 - 0.0779)

Brown

LWR

1.979 - 1.982 (0.0779 - 0.0780)

Green

UPR

1.979 - 1.982 (0.0779 - 0.0780)

Green

LWR

1.982 - 1.985 (0.0780 - 0.0781)

Yellow

UPR

1.982 - 1.985 (0.0780 - 0.0781)

Yellow

LWR

1.985 - 1.988 (0.0781 - 0.0783)

Blue

UPR

1.985 - 1.988 (0.0781 - 0.0783)

Blue

LWR

1.988 - 1.991 (0.0783 - 0.0784)

Pink

UPR

1.988 - 1.991 (0.0783 - 0.0784)

Pink

LWR

1.991 - 1.994 (0.0784 - 0.0785)

Purple

UPR

1.991 - 1.994 (0.0784 - 0.0785)

Purple

LWR

1.994 - 1.997 (0.0785 - 0.0786)

White

SEM685D

Item

Thickness

Main journal diameter

US 0.25 (0.0098)

2.106 - 2.114 (0.0829 - 0.0832)

Grind so that bearing clearance is the specified value.

Main bearing oil clearance

Standard

No. 1, 3 and 5

0.028 - 0.042 (0.0011 - 0.0017)

No. 2 and 4

0.041 - 0.056 (0.0016 - 0.0022)

Limit

0.1 (0.004)

EM-118

< SERVICE DATA AND SPECIFICATIONS (SDS)

[QR25DE]

SERVICE DATA AND SPECIFICATIONS (SDS)

*: Always check with the Parts Department for the latest parts information.

Undersize

Unit: mm (in)

Bearing Oil Clearance

Unit: mm (in)

Grade number*

Thickness mm (in)

Identification color

1.493 - 1.496 (0.0588 - 0.0589)

Black

1.496 - 1.499 (0.0589 - 0.0590)

Brown

1.499 - 1.502 (0.0590 - 0.0591)

Green

1.502 - 1.505 (0.0591 - 0.0593)

Yellow

1.505 - 1.508 (00.593 - 0.0594)

Blue

Item

Thickness

Crank pin journal diameter

US 0.25 (0.0098)

1.624 - 1.632 (0.0639 - 0.0643)

Grind so that bearing clearance is the specified value.

Connecting rod bearing oil clearance

Standard

0.035 - 0.045 (0.0014 - 0.0018)

Limit

0.10 (0.0039)

PRECAUTIONS

EM-119

< PRECAUTION >

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PRECAUTION

PRECAUTIONS

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

INFOID:0000000010150966

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:0000000009478084

Drain engine coolant when engine is cooled.

Precaution for Disconnecting Fuel Piping

INFOID:0000000009478085

• 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:0000000009478086

• 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:0000000009478087

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

replace if necessary.

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< PRECAUTION >

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PRECAUTIONS

Precaution for Assembly and Installation

INFOID:0000000009478088

• 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.

• 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:0000000009478089

• 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:0000000009478090

REMOVAL OF LIQUID GASKET

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

remove the old liquid gasket using Tool.

CAUTION:

Do not damage the mating surfaces.

• Tap the seal cutter to insert it (1).

• In areas where the Tool is difficult to use, lightly tap to slide it (2).

LIQUID GASKET APPLICATION PROCEDURE

1. Remove the old liquid gasket adhering to the gasket application

surface and the mating surface using suitable tool.

• Remove the 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 material.

Tool number

: KV10112100 (BT-8653-A)

Tool number

: KV10111100 (J-37228)

WBIA0566E

PBIC0003E

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