Infiniti FX35, FX50 (S51). Manual - part 963

EM-152

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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SERVICE DATA AND SPECIFICATIONS (SDS)

Unit: mm (in)

MAIN BEARING OIL CLEARANCE

Unit: mm (in)

*: Actual clearance

Connecting Rod Bearing

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CONNECTING ROD BEARING

Unit: mm (in)

UNDERSIZE

Unit: mm (in)

CONNECTING ROD BEARING OIL CLEARANCE

Unit: mm (in)

*: Actual clearance

Items

Thickness

Main journal diameter

0.25 (0.0098)

2.633 - 2.641 (0.1037 - 0.1040)

Grind so that bearing clearance is the specified value.

Items

Standard

Limit

Main bearing oil clearance

0.035 - 0.045 (0.0014 - 0.0018)*

0.065 (0.0026)

Grade number

Thickness

Identification color (mark)

0

1.497 - 1.500 (0.0589 - 0.0591)

Black

1

1.500 - 1.503 (0.0591 - 0.0592)

Brown

2

1.503 - 1.506 (0.0592 - 0.0593)

Green

3

1.506 - 1.509 (0.0593 - 0.0594)

Yellow

4

1.509 - 1.512 (0.0594 - 0.0595)

Blue

Items

Thickness

Crank pin journal diameter

0.25 (0.0098)

1.626 - 1.634 (0.0640 - 0.0643)

Grind so that bearing clearance is the specified value.

Items

Standard

Limit

Connecting rod bearing oil clearance

0.040 - 0.053 (0.0016 - 0.0021)*

0.070 (0.0028)

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

EM-153

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting - Engine Noise

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

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1.

Locate the area where noise occurs.

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EM-154

< SYMPTOM DIAGNOSIS >

[VK50VE]

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

2.

Confirm the type of noise.

3.

Specify the operating condition of the engine.

4.

Check specified noise source.

If necessary, repair or replace these parts.

A: Closely related

B: Related

C: Sometimes related

—: Not related

Location 

of noise

Type of 

noise

Operating condition of engine

Source of 

noise

Check item

Refer-

ence page

Before 

warm-

up

After 

warm-

up

When 

start-

ing

When 

idling

When 

racing

While 

driving

Top of en-
gine
Rocker 
cover
Cylinder 
head

Ticking or 
clicking

C

A

—

A

B

—

Tappet 
noise

Valve clearance

EM-169

Rattle

C

A

—

A

B

C

Camshaft 
bearing 
noise

Camshaft runout
Camshaft journal oil 
clearance

EM-236

Crank-
shaft pul-
ley
Cylinder 
block 
(Side of 
engine)
Oil pan

Slap or 
knock

—

A

—

B

B

—

Piston pin 
noise

Piston to piston pin oil 
clearance
Connecting rod bushing 
oil clearance

EM-265

Slap or 
rap

A

—

—

B

B

A

Piston 
slap noise

Piston to cylinder bore 
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend 
and torsion

EM-265

Knock

A

B

C

B

B

B

Connect-
ing rod 
bearing 
noise

Connecting rod bushing 
oil clearance
Connecting rod bearing 
oil clearance 

EM-265

Knock

A

B

—

A

B

C

Main bear-
ing noise

Main bearing oil clear-
ance
Crankshaft runout

EM-265

Front of 
engine
Timing 
chain case

Tapping or 
ticking

A

A

—

B

B

B

Timing 
chain and 
timing 
chain ten-
sioner 
noise

Timing chain cracks 
and wears
Timing chain tensioner 
operation

EM-225

Front of 
engine

Squeak-
ing or fizz-
ing

A

B

—

B

—

C

Drive belts 
(Sticking 
or slip-
ping)

Drive belts deflection

EM-164

Creaking

A

B

A

B

A

B

Drive belts 
(Slipping)

Idler pulley bearing op-
eration

Squall
Creak

A

B

—

B

A

B

Water 
pump 
noise

Water pump operation

CO-45

PRECAUTIONS

EM-155

< PRECAUTION >

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PRECAUTION

PRECAUTIONS

Precaution for Procedure without Cowl Top Cover

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When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.

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

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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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

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 “SRS AIR BAG”.

• 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition 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 3 minutes before performing any service.

Precaution Necessary for Steering Wheel Rotation after Battery Disconnect

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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.

For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.

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