Nissan Frontier D22. Manual — part 693

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING

EM-79

[VG33E and VG33ER]

C

D

E

F

G

H

I

J

K

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A

EM

NVH TROUBLESHOOTING CHART — ENGINE NOISE

Use the chart 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 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

Reference

page

Be
fo

re

wa

rm

-u

p

A

fte

r wa

rm-

u

p

W
h

en st

ar

ting

W
h

e

n

id
lin

g

W
hen r

a

ci

ng

W
h

ile

d

riv

in

g

Top of
engine
Rocker
cover
Cylinder
head

Ticking or
clicking

C

A

—

A

B

—

Tappet
noise

Hydraulic valve lifter

EM-116

Rattle

C

A

—

A

B

C

Camshaft
bearing
noise

Camshaft journal clearance
Camshaft runout

EM-111

,

EM-110

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 bushing clearance

EM-133

,

EM-140

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-135

,

EM-133

,

EM-134

,

EM-134

Knock

A

B

C

B

B

B

Connect-
ing rod
bearing
noise

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

EM-140

,

EM-139

Knock

A

B

—

A

B

C

Main bear-
ing noise

Main bearing oil clearance
Crankshaft runout

EM-137

,

EM-136

Timing belt
cover

Whine or
hissing

C

A

—

A

A

—

Timing belt
noise (too
tight)

Loose timing belt
Belt contacting case

EM-93

Clatter

A

B

—

C

A

—

Timing belt
noise (too
loose)

Front of
engine

Squeak-
ing or fizz-
ing

A

B

—

B

—

C

Other
drive belts
(Sticking
or slipping)

Drive belts deflection

MA-24

Creaking

A

B

A

B

A

B

Other
drive belts
(Slipping)

Idler pulley bearing operation

Squall
Creak

A

B

—

B

A

B

Water
pump
noise

Water pump operation

CO-26

EM-80

[VG33E and VG33ER]

OUTER COMPONENT PARTS

OUTER COMPONENT PARTS

PFP:00100

Removal and Installation

EBS00GTB

VG33E

WBIA0185E

OUTER COMPONENT PARTS

EM-81

[VG33E and VG33ER]

C

D

E

F

G

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A

EM

1.

PCV valve

2.

Intake manifold collector

3.

Gasket

4.

Copper washer

5.

Water outlet

6.

Thermal transmitter

7.

Fresh air inlet

8.

Engine coolant temperature sensor

9.

Intake manifold

10. Distributor

11.

O-ring

12. Water pump

13. Fuel injector cap

14. Insulator

15. Fuel injector

16. Engine cooling fan

17. Fuel tube

18. Fuel pressure regulator

19. Fuel feed hose

20. Fuel return hose

21. Throttle body

22. Air relief plug

23. EGR guide tube

24. EGR temperature sensor

25. EGRC solenoid valve

26. EGR tube

27. EGR control valve

28. EGRC-BPT valve

29. Throttle opener

30. Ground

31. IACV-AAC valve assembly

EM-82

[VG33E and VG33ER]

OUTER COMPONENT PARTS

VG33ER

WBIA0186E

1.

PCV valve

2.

Intake manifold collector

3.

Gasket

4.

Copper washer

5.

Water outlet

6.

Thermal transmitter