Infiniti M45 (Y34). Manual - part 518

PREPARATION

EM-9

C

D

E

F

G

H

I

J

K

L

M

A

EM

(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 dia.) for zirconia 
heated oxygen sensor
b: J-43897-12 (12 mm dia.) for titania 
heated oxygen sensor

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

Lubricating heated oxygen sensor thread 
cleaning tool when reconditioning exhaust 
system threads

(Kent-Moore No.)
Tool name

Description

AEM488

AEM489

EM-10

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

PFP:00003

NVH Troubleshooting —Engine Noise

ABS000LE

PBIC2672E

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

EM-11

C

D

E

F

G

H

I

J

K

L

M

A

EM

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

ABS000LF

1.

Locate the area where noise occurs.

2.

Confirm the type of noise.

3.

Specify the operating condition of 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 
engine
Rocker 
cover
Cylinder 
head

Ticking or 
clicking

C

A

—

A

B

—

Tappet noise

Valve clearance

EM-55

Rattle

C

A

—

A

B

C

Camshaft 
bearing noise

Camshaft journal oil 
clearance
Camshaft runout

EM-51
EM-50

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

Slap or 
knock

—

A

—

B

B

—

Piston pin 
noise

Piston and piston pin 
clearance
Connecting rod bush-
ing clearance

EM-96
EM-98

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-100
EM-97
EM-97
EM-98

Knock

A

B

C

B

B

B

Connecting 
rod bearing 
noise

Connecting rod bush-
ing clearance
Connecting rod bear-
ing oil clearance

EM-98
EM-103

Knock

A

B

—

A

B

C

Main bearing 
noise

Main bearing oil clear-
ance
Crankshaft runout

EM-103
EM-102

Front of 
engine
Front 
cover

Tapping or 
ticking

A

A

—

B

B

B

Timing chain 
and chain 
tensioner 
noise

Timing chain cracks 
and wear
Chain tensioner opera-
tion

EM-42
EM-38

Front of 
engine

Squeak-
ing or fizz-
ing

A

B

—

B

—

C

Drive belts 
(Sticking or 
slipping)

Drive belts deflection

EM-13

Creaking

A

B

A

B

A

B

Drive belts 
(Slipping)

Idler pulley bearing 
operation

Squall
Creak

A

B

—

B

A

B

Water pump 
noise

Water pump operation

CO-23, 
"INSPEC-
TION 
AFTER 
REMOVA
L"

EM-12

ENGINE ROOM COVER

ENGINE ROOM COVER

PFP:14049

Removal and Installation

ABS000LG

REMOVAL

●

Remove clips on back with clip driver for front air guide.

CAUTION:

Do not damage or scratch cover when installing or removing. 

●

Major parts and inspection points under each cover are as follows; (numbered as in illustration)

1.

Upper side of engine assembly, power steering reservoir tank, cooling fan reservoir tank

2.

Relay

3.

Cooling fan fluid cooler, power steering fluid cooling tube

4.

Engine assembly front side, drive belts, cooling fan

INSTALLATION

●

Install in the reverse order of removal.

1.

Engine cover

2.

Relay box

3.

Front air guide

4.

Air duct (inlet)

PBIC2724E