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Nissan Altima L32. Manual - part 643

EM-108

< SERVICE DATA AND SPECIFICATIONS (SDS)

[QR25DE]

SERVICE DATA AND SPECIFICATIONS (SDS)

*: Total indicator reading

MAIN BEARING

Unit: mm. (in)

Undersize

Unit: mm. (in)

Bearing Clearance

Unit: mm. (in)

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

Size U.S.

Thickness

Main journal diameter

0.25 (0.0098)

2.106 - 2.114 (0.0829 - 0.0832)

Grind so that bearing clearance is the spec-
ified value.

Main bearing oil clearance

Standard

No.1, 3, and 5

0.012 - 0.022 (0.0005 - 0.0009)

No.2 and 4

0.018 - 0.028 (0.0007 - 0.0011)

Limit

0.1 (0.004)

SERVICE DATA AND SPECIFICATIONS (SDS)

EM-109

< SERVICE DATA AND SPECIFICATIONS (SDS)

[QR25DE]

CONNECTING ROD BEARING

Undersize

Unit: mm. (in)

Bearing Clearance

Unit: mm. (in)

FLYWHEEL

Unit: mm. (in)

Grade number

Thickness mm. (in)

Identification color (mark)

0 (upper)

1.496 - 1.493 (0.0589 - 0.0588)

Black

0 (lower)

1.496 - 1.493 (0.0589 - 0.0588)

Black

01 (upper)

1.496 - 1.493 (0.0589 - 0.0588)

Black

01 (lower)

1.499 - 1.496 (0.0590 - 0.0589)

Brown

1 (upper)

1.499 - 1.496 (0.0590 - 0.0589)

Brown

1 (lower)

1.499 - 1.496 (0.0590 - 0.0589)

Brown

12 (upper)

1.499 - 1.496 (0.0590 - 0.0589)

Brown

12 (lower)

1.502 - 1.499 (0.0591 - 0.0590)

Green

2 (upper)

1.502 - 1.499 (0.0591 - 0.0590)

Green

2 (lower)

1.502 - 1.499 (0.0591 - 0.0590)

Green

23 (upper)

1.502 - 1.499 (0.0591 - 0.0590)

Green

23 (lower)

1.507 - 1.502 (0.0593 - 0.0591)

Yellow

3 (upper)

1.507 - 1.502 (0.0593 - 0.0591)

Yellow

3 (lower)

1.507 - 1.502 (0.0593 - 0.0591)

Yellow

34 (upper)

1.507 - 1.502 (0.0593 - 0.0591)

Yellow

34 (lower)

1.508 - 1.505 (0.0594 - 0.0593)

Blue

4 (upper)

1.508 - 1.505 (0.0594 - 0.0593)

Blue

4 (lower)

1.508 - 1.505 (0.0594 - 0.0593)

Blue

Size U.S.

Thickness

Crank pin journal diameter

0.25 (0.0098)

1.622 - 1.630 (0.0639 - 0.0642)

Grind so that bearing clearance is the spec-
ified value.

Connecting rod bearing clear-
ance

Standard

0.035 - 0.045 (0.0014 - 0.0018)

Limit

0.10 (0.0039)

Deflection of flywheel contact
surface to the clutch

Limit

0.45 (0.0177) or less under no load

Axial displacement at 250
(9.84) dia

Limit

1.3 (0.051) or less under 100 N (22.48 kg-f)

Movement amount (A) and (B)
on circumference of the fly-
wheel (transmission side)

Standard

35 (1.38) or less

EM-110

< PRECAUTION >

[VQ35DE]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

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

INFOID:0000000004202138

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.

Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000004501332

NOTE:

• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-

tion, then disconnect both battery cables.

• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both

battery cables.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.

This vehicle is equipped with a push-button ignition switch and a steering lock unit.

If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.

If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure

below before starting the repair operation.

OPERATION PROCEDURE

1. Connect both battery cables.

NOTE:

Supply power using jumper cables if battery is discharged.

2. Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.

(At this time, the steering lock will be released.)

3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-

nected and the steering wheel can be turned.

4. Perform the necessary repair operation.
5. 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.)

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

Precaution for Drain Coolant

INFOID:0000000004202139

• Drain coolant when engine is cooled.

Precaution for Disconnecting Fuel Piping

INFOID:0000000004202140

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

PRECAUTIONS

EM-111

< PRECAUTION >

[VQ35DE]

• Release fuel pressure before disassembly.

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

Precaution for Removal and Disassembly

INFOID:0000000004202141

• 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 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

INFOID:0000000004202142

• 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:0000000004202143

• 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 oil or 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 after draining 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 coolant, fuel, oil, and exhaust systems for

leakage.

Parts Requiring Angular Tightening

INFOID:0000000004202144

• Use an angle wrench for the final tightening of the following engine parts:

- Cylinder head bolts

- Main bearing cap bolts

- Connecting rod cap nuts

- Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angular

tightening)

• 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:0000000004202145

REMOVAL OF LIQUID GASKET SEALING

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

remove the sealant using Tool.

CAUTION:

Be careful not to damage the mating surfaces.

• In areas where the cutter is difficult to use, use a plastic hammer to

lightly tap (1) the cutter where the RTV Silicone Sealant is applied.

Use a plastic hammer to slide the cutter (2) by tapping on the side.

CAUTION:

Tool number

: KV10111100 (J-37228)

WBIA0566E

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