Nissan Pathfinder. Manual - part 543
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
EM-11
< SYSTEM DESCRIPTION >
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Use the Chart Below to Help You Find the Cause of the Symptom
INFOID:0000000009177884
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. Repair or replace the identified part as necessary.
A: Closely related B: Related C: Sometimes related —: Not related
7.
Timing chain and chain
tensioner noise
8.
Drive belt noise (Sticking/Slipping)
9.
Tappet noise
A.
Valve
B.
Valve mechanism
C.
Rotation mechanism
D.
Drive belt
E.
Timing chain
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 en-
gine
Rocker
cover
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
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 clear-
ance
Piston ring side clear-
ance
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 clear-
ance
Crankshaft runout
Front of
engine
Timing
chain cov-
er
Tapping or
ticking
A
A
—
B
B
B
Timing
chain and
chain ten-
sioner
noise
Timing chain cracks
and wear
Timing chain tensioner
operation
Front of
engine
Squeak-
ing or fizz-
ing
A
B
—
B
—
C
Drive belts
(Sticking
or slip-
ping)
Drive belts deflection
Creaking
A
B
A
B
A
B
Drive belts
(Slipping)
Idler pulley bearing op-
eration
Squall
Creak
A
B
—
B
A
B
Water
pump
noise
Water pump operation