Infiniti Q45 (FY33). Manual - part 411

Tool name

Description

Front oil seal drift

NT049

Installing front oil seal

a = 65 mm (2.56 in) dia.
b = 45 mm (1.77 in) dia.

Rear oil seal drift

NT049

Installing rear oil seal

a = 100 mm (3.94 in) dia.
b = 80 mm (3.15 in) dia.

GI

MA

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

HA

EL

IDX

PREPARATION

Commercial Service Tools (Cont’d)

EM-5

SEM626F

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

EM-6

NVH Troubleshooting — Engine Noise

Use the table below to help you find the cause of the symptom.
1.

Locate the area where noise occurs.

2.

Confirm the type of noise.

3.

Specify the operating condition of the engine.

4.

Check the specified noise source.

If necessary, repair or replace these parts.

Location of

noise

Type of

noise

Operating condition of engine

Source of

noise

Check item

Reference

page

Before

warm-up

After

warm-up

When

starting

When

idling

When

racing

While

driving

Top of
engine
Rocker
cover
Cylinder
head

Ticking or
clicking

C

A

—

A

B

—

Tappet
noise

Hydraulic lash adjuster

EM-39

Rattle

C

A

—

A

B

C

Camshaft
bearing
noise

Camshaft journal clearance
Camshaft runout

EM-35, 36

Crankshaft
pulley
Cylinder
block (Side
of engine)
Oil pan

Slap or
knock

—

A

—

B

B

—

Piston pin
noise

Piston and piston pin clear-
ance
Connecting rod bushing
clearance

EM-47, 52

Slap or rap

A

—

—

B

B

A

Piston slap
noise

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

EM-48, 47

Knock

A

B

C

B

B

B

Connecting
rod bearing
noise

Connecting rod bushing
clearance (Small end)
Connecting rod bearing
clearance (Big end)

EM-52, 51

Knock

A

B

—

A

B

C

Main bear-
ing noise

Main bearing oil clearance
Crankshaft runout

EM-49, 50

Front of
engine
Timing
chain cover

Tapping or
ticking

A

A

—

B

B

B

Timing
chain and
chain ten-
sioner noise

Timing chain cracks and
wear

EM-18

Front of
engine

Squeaking
or fizzing

A

B

—

B

—

C

Other drive
belts (Stick-
ing or slip-
ping)

Drive belt deflection

MA section
(“Checking
Drive Belts”,
“ENGINE
MAINTE-
NANCE”)

Creaking

A

B

A

B

A

B

Other drive
belts (Slip-
ping)

Idler pulley bearing operation

Squall
Creak

A

B

—

B

A

B

Water pump
noise

Water pump operation

LC section
(“Water
Pump
Inspection”,
“ENGINE
COOLING
SYSTEM”)

A: Closely related

B: Related

C: Sometimes related

—: Not related

GI

MA

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

HA

EL

IDX

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

EM-7

SEM622FA

q

1

Intake manifold collector

q

2

EGR valve

q

3

EGR temperature sensor

q

4

Throttle body

q

5

IACV-AAC valve

q

6

Injector

q

7

Fuel tube assembly

q

8

Intake manifold

OUTER COMPONENT PARTS

EM-8