Nissan Note [13/334] Noise vibration and harshness nvh troubleshooting

Nissan Note [13/334] Noise vibration and harshness nvh troubleshooting
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-13
[CR]
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.
BBS002N2
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
CAAB
Tappet
noise
Valve clearance EM-47
Rattle C A A B C
Camshaft
bearing
noise
Camshaft journal clear-
ance
Camshaft runout
EM-45
EM-44
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-85
EM-87
Slap or
rap
ABBA
Piston
slap noise
Piston-to-bore clear-
ance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsion
EM-89
EM-86
EM-86
EM-87
Knock ABCBBB
Connect-
ing rod
bearing
noise
Connecting rod bush-
ing clearance (Small
end)
Connecting rod bear-
ing clearance (Big end)
EM-87
EM-87
Knock A B A B C
Main
bearing
noise
Main bearing oil clear-
ance
Crankshaft runout
EM-92
EM-91
Front of
engine
Timing
chain
cover
Tapping or
ticking
AABBB
Timing
chain and
chain
tensioner
noise
Timing chain cracks
and wear
Timing chain tensioner
operation
EM-53
EM-51
Front of
engine
Squeak-
ing or fizz-
ing
ABBC
Drivebelts
(Sticking
or slip-
ping)
Drive belts deflection
EM-14
CreakingABABAB
Drivebelts
(Slipping)
Idler pulley bearing
operation
Squall
Creak
ABBAB
Water
pump
noise
Water pump operation CO-17

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