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
L
M
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
Rattle
C
A
—
A
B
C
Camshaft
bearing
noise
Camshaft journal clearance
Camshaft runout
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
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
Knock
A
B
C
B
B
B
Connect-
ing rod
bearing
noise
Connecting rod bushing clearance
(Small end) Connecting rod bearing
clearance (Big end)
Knock
A
B
—
A
B
C
Main bear-
ing noise
Main bearing oil clearance
Crankshaft runout
Timing belt
cover
Whine or
hissing
C
A
—
A
A
—
Timing belt
noise (too
tight)
Loose timing belt
Belt contacting case
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
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