Nissan Pathfinder (2009 year). Manual — part 387
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
EM-153
< FUNCTION DIAGNOSIS >
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Use the Chart Below to Help You Find the Cause of the Symptom
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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
EM-154
< FUNCTION DIAGNOSIS >
[VK56DE]
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
A: Closely related
B: Related
C: Sometimes related
—: Not related
Front of en-
gine
Squeak-
ing or
fizzing
A
B
—
B
—
C
Drive belts
(Sticking or
slipping)
Drive belts deflection
Creaking
A
B
A
B
A
B
Drive belts
(Slipping)
Idler pulley bearing op-
eration
Squall
Creaking
A
B
—
B
A
B
Water pump
noise
Water pump operation
Rattle
—
—
A
—
—
—
VTC
VTC lock pin clearance
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
2009 Pathfinder
DRIVE BELTS
EM-155
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ON-VEHICLE MAINTENANCE
DRIVE BELTS
Exploded View
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Checking Drive Belts
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WARNING:
Be sure to perform when the engine is stopped.
1.
Remove air duct and resonator assembly when inspecting drive belt.
2.
Make sure that indicator (single line notch) of each auto tensioner is within the allowable working range
(between three line notches).
NOTE:
• Check the drive belt auto tensioner indication when the engine is cold.
• The indicator notch is located on the moving side of the drive belt auto tensioner.
3.
Visually check entire belt for wear, damage or cracks.
4.
If the indicator is out of allowable working range or belt is damaged, replace the belt. Refer to
Adjustment
INFOID:0000000003939536
There is no manual drive belt tension adjustment. The drive belt tension is automatically adjusted by the drive
belt auto tensioner.
Removal and Installation
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REMOVAL
1.
Remove the air duct and resonator assembly. Refer to
EM-167, "Removal and Installation"
1.
Drive belt
2.
Power steering pump pulley
3.
Generator pulley
4.
Crankshaft pulley
5.
A/C compressor
6.
Idler pulley
7.
Cooling fan pulley
8.
Water pump pulley
9.
Drive belt auto tensioner
A.
Allowable working range
LBIA0391E
2009 Pathfinder
EM-156
< ON-VEHICLE MAINTENANCE >
[VK56DE]
DRIVE BELTS
2.
Install Tool on drive belt auto tensioner pulley bolt, move in the
direction of arrow (loosening direction of tensioner) as shown.
WARNING:
Avoid placing hand in a location where pinching may occur
if the holding tool accidentally comes off.
3.
Remove the drive belt.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Make sure belt is securely installed around all pulleys.
• Rotate the crankshaft pulley several turns clockwise to equalize belt tension between pulleys.
• Make sure belt tension is within the allowable working range, using the indicator notch on the drive belt auto
tensioner. Refer to
EM-155, "Checking Drive Belts"
Drive Belt Auto Tensioner and Idler Pulley
INFOID:0000000003939538
REMOVAL
1.
Remove the air duct and resonator assembly. Refer to
EM-167, "Removal and Installation"
2.
Remove the drive belt. Refer to
EM-155, "Removal and Installation"
.
3.
Remove the drive belt auto tensioner and idler pulley using power tool.
INSTALLATION
Installation is in the reverse order of removal.
Tool number
:
—
(J-46535)
WBIA0537E
WBIA0607E
1.
Drive belt auto tensioner
2.
Idler pulley
2009 Pathfinder
AIR CLEANER FILTER
EM-157
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AIR CLEANER FILTER
Exploded View
INFOID:0000000003939539
Removal and Installation
INFOID:0000000003939540
REMOVAL
NOTE:
• The viscous paper type filter does not need cleaning between replacement intervals.
• Replace the air filter as necessary for periodic maintenance. Refer to
MA-7, "Introduction of Periodic Mainte-
.
1.
Unhook clips, and lift air cleaner case (upper).
2.
Remove the air cleaner filter.
INSTALLATION
1.
Installation is in the reverse order of removal.
1.
Air cleaner case (lower)
2.
Air cleaner filter
3.
Air cleaner case (upper)
4.
Air duct and resonator assembly
⇐
Front
ALBIA0413GB
2009 Pathfinder
EM-158
< ON-VEHICLE MAINTENANCE >
[VK56DE]
SPARK PLUG
SPARK PLUG
Exploded View
INFOID:0000000003939541
Removal and Installation
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REMOVAL
1.
Remove engine room cover using power tool. Refer to
EM-166, "Removal and Installation"
.
2.
Remove ignition coil. Refer to
EM-179, "Removal and Installation"
3.
Remove spark plug using suitable tool.
CAUTION:
Do not drop or shock it.
INSPECTION AFTER REMOVAL
• Do not use a wire brush for cleaning.
• If the spark plug tip is covered with carbon, a spark plug cleaner
may be used.
1.
Ignition coil
2.
Spark plug
WBIA0796E
SEM294A
Cleaner air pressure
: Less than 588 kPa (5.9 bar, 6 kg/
cm
2
, 85 psi)
Cleaning time
: Less than 20 seconds
SMA773C
2009 Pathfinder
SPARK PLUG
EM-159
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• Checking and adjusting spark plug gap is not required between
change intervals.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Do not drop or shock spark plug.
SMA806CA
Make
NGK
Standard type
DILFR5A-11
Gap (Nominal)
1.1 mm (0.043 in)
2009 Pathfinder
EM-160
< ON-VEHICLE MAINTENANCE >
[VK56DE]
CAMSHAFT VALVE CLEARANCE
CAMSHAFT VALVE CLEARANCE
Valve Clearance
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INSPECTION
NOTE:
Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts,
or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or
noise).
1.
Warm up the engine. Then stop the engine.
2.
Remove the engine room cover. Refer to
EM-166, "Removal and Installation"
3.
Remove the air cleaner and air duct assembly. Refer to
4.
Remove the RH bank and LH bank rocker covers using power tool. Refer to
.
5.
Turn the crankshaft pulley in the normal direction (clockwise
when viewed from engine front) to align TDC identification notch
(without paint mark) with timing indicator.
6.
At this time, make sure both the intake and exhaust cam noses
of No. 1 cylinder (top front on LH bank) face outside.
• If they do not face outside, turn crankshaft pulley once more.
KBIA2476E
KBIA0400J
2009 Pathfinder
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