Nissan Pathfinder (2009 year). Manual - part 387
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
EM-153
< FUNCTION DIAGNOSIS >
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C
D
E
F
G
H
I
J
K
L
M
A
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P
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Use the Chart Below to Help You Find the Cause of the Symptom
INFOID:0000000003939533
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.
1.
Timing chain
2.
Intake valve
3.
Exhaust valve
4.
Drive belt
5.
Water pump
A.
VTC noise
B.
Tappet noise
C.
Camshaft bearing noise
D.
Valve mechanism
E.
Rotation mechanism
F.
Piston pin noise
G.
Piston slap noise
H.
Main bearing noise
I.
Connecting rod bearing noise
J.
Drive belt noise (slipping)
K.
Drive belt noise (stick/slipping)
L.
Water pump noise
M.
Timing chain and chain tensioner noise
Location of
noise
Type of
noise
Operating condition of engine
Source of
noise
Check item
Refer-
ence page
Be-
fore
warm-
up
After
warm-
up
When
start-
ing
When
idling
When
racing
While
driv-
ing
Top of en-
gine
Rocker cov-
er
Cylinder
head
Ticking or
clicking
C
A
—
A
B
—
Tappet noise
Valve clearance
Rattle
C
A
—
A
B
C
Camshaft
bearing noise
Camshaft journal clear-
ance
Camshaft runout
Crankshaft
pulley
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 clear-
ance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsion
Knock
A
B
C
B
B
B
Connecting
rod bearing
noise
Connecting rod bushing
oil clearance (Small
end)
Connecting rod bearing
clearance (Big end)
Knock
A
B
—
A
B
C
Main bearing
noise
Main bearing oil clear-
ance
Crankshaft runout
Front of en-
gine
Chain case
cover
Front cover
Tapping
or ticking
A
A
—
B
B
B
Timing chain
and chain
tensioner
noise
Timing chain cracks
and wear
Timing chain tensioner
operation
2009 Pathfinder