Nissan Murano Z50 (2003 year). Manual — part 125
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
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NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
PFP:00003
NVH Troubleshooting —Engine Noise
ABS00327
SEM706G
EM-10
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision; 2004 April
2003 Murano
Use the Chart Below to Help You Find the Cause of the Symptom.
ABS00328
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
C
A
—
A
B
—
Tappet
noise
Valve clearance
Rattle
C
A
—
A
B
C
Camshaft
bearing
noise
Camshaft runout
Camshaft journal clear-
ance
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
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 bush-
ing clearance (Small
end)
Connecting rod bear-
ing clearance (Big end)
Knock
A
B
—
A
B
C
Main
bearing
noise
Main bearing oil clear-
ance
Crankshaft runout
Front of
engine
Timing
chain
cover
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
operation
Squall
Creak
A
B
—
B
A
B
Water
pump
noise
Water pump operation
DRIVE BELTS
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DRIVE BELTS
PFP:02117
Checking Drive Belts
ABS00329
WARNING:
Be sure to perform when the engine is stopped.
1.
Inspect belts for cracks, fraying, wear and oil. If necessary, replace.
2.
Inspect drive belt deflection or tension at a point on the belt mid-
way between pulleys.
●
Inspection should be done only when engine is cold, or over
30 minutes after engine is stopped.
●
Measure belt tension with tension gauge (BT3373-F or equiv-
alent) at points marked shown in the figure.
●
When measuring deflection, apply 98 N (10 kg, 22 lb) at the
marked point.
●
Adjust if belt deflection exceeds the limit or if belt tension is
not within specifications.
CAUTION:
●
When checking belt deflection or tension immediately after installation, first adjust it to the
specified value. Then, after turning the crankshaft two turns or more, re-adjust to the specified
value to avoid variation in deflection between pulleys.
●
Tighten idler pulley lock nut by hand and measure deflec-
tion or tension without looseness.
Belt Deflection and Tension
*: If belt tension gauge cannot be installed at check points shown, check drive belt tension at different location on the belt.
Tension Adjustment
ABS0036V
CAUTION:
●
When belt is replaced with a new one, adjust it to value for “New belt” to accommodate for insuffi-
cient adaptability with pulley grooves.
PBIC1161E
PBIC1162E
Deflection adjustment Unit: mm (in)
Tension adjustment* Unit: N (kg, lb)
Used belt
New belt
Used belt
New belt
Limit
After adjustment
Limit
After adjustment
Alternator and
air conditioner
compressor
7 (0.28)
4.2 - 4.6
(0.17 - 0.18)
3.7 - 4.1
(0.15 - 0.16)
294 (30, 66)
730 - 818
(74.5 - 83.5,
164 - 184)
838 - 926
(85.5 - 94.5,
188 - 208)
Power steering
oil pump
11 (0.43)
7.3 - 8
(0.29 - 0.30)
6.5 - 7.2
(0.26 - 0.28)
196 (20, 44)
495 - 583
(50.5 - 59.5,
111 - 131)
603 - 691
(61.5 - 70.5,
135.6 - 155.4)
Applied pushing
force
98 N (10 Kg, 22 lb)
—
Portion
Belt tightening method for adjustment
Power steering oil pump belt
Adjusting bolt on power steering oil pump
Alternator and air conditioner compressor belt
Adjusting bolt on idler pulley
EM-12
DRIVE BELTS
Revision; 2004 April
2003 Murano
●
When deflection or tension of belt being used exceeds “Used belt limit”, adjust it to value for
“After adjustment of used belt”.
●
When checking belt deflection or tension immediately after installation, first adjust it to the speci-
fied value. Then, after turning the crankshaft two turns or more, re-adjust to the specified value to
avoid variation in deflection between pulleys.
●
When installing belt, make sure that it is correctly engaged with pulley groove.
●
Keep oil and water away from belt.
●
Do not twist or bend belt excessively.
ALTERNATOR AND AIR CONDITIONER COMPRESSOR BELT
1.
Remove splash guard (RH).
2.
Loosen idler pulley lock nut (A) and adjust tension by turning
adjusting bolt (B).
●
For specified belt tension, refer to
3.
Tighten lock nut (A).
4.
Tighten adjusting bolt (B).
POWER STEERING OIL PUMP BELT
1.
Remove splash guard (RH).
2.
Loosen adjusting bolt (C).
3.
Loosen power steering oil pump mounting bolt (D).
●
Bolt head (D) is engine rear side.
4.
Adjust by turning adjusting bolt (E).
●
For specified belt tension, refer to
NOTE:
Adjusting bolt (E) is loosened with counter-clockwise rotation.
5.
Tighten bolt (C), then bolt (D).
Removal and Installation
ABS0036W
REMOVAL
1.
Remove splash guard (RH).
2.
Fully loosen each belt by following the guidelines in
. Remove alternator and
air conditioner compressor belt and then power steering oil pump belt.
CAUTION:
Grease is applied to idler pulley adjusting bolt. Be careful to keep grease away from the belt.
: 30.4 - 39.2 N·m (3.1 - 3.9 kg-m, 23 - 28 ft-lb)
: 3.9 - 6.9 N·m (0.4 - 0.7 kg-m, 35 - 61 in-lb)
PBIC1163E
Tightening torque:
Bolt (C) : 24.5 - 31.4 N·m (2.5 - 3.2 kg-m, 18 - 23 ft-lb)
Bolt (D) : 36.3 - 50.0 N·m (3.7 - 5.1 kg-m, 27 - 36 ft-lb)
DRIVE BELTS
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INSTALLATION
1.
Install belts to pulley in reverse order of removal.
CAUTION:
●
Make sure belt is correctly engaged with the pulley groove.
●
Check for oil and engine coolant on belt and each pulley groove.
2.
3.
Tighten each adjusting bolt and nut to the specified torque.
4.
Make sure that tension of each belt is within the standard.
EM-14
AIR CLEANER AND AIR DUCT
Revision; 2004 April
2003 Murano
AIR CLEANER AND AIR DUCT
PFP:16500
Removal and Installation
ABS0033C
REMOVAL
1.
Remove RH and LH both side radiator cover grills.
2.
Remove air duct (inlet).
3.
Disconnect harness connector from the mass air flow sensor.
4.
Disconnect the tube clamp at the electric throttle control actuator and at the mass air flow sensor.
5.
Remove PCV hose, air cleaner case (upper) with the mass air flow sensor attached.
6.
Remove mass air flow sensor from air cleaner case (upper), as necessary.
CAUTION:
Handle mass air flow sensor with care.
●
Do not shock it.
●
Do not disassemble it.
●
Do not touch its sensor.
7.
Remove resonator in the fender, lifting left fender protector, as necessary.
1.
Air cleaner case (lower)
2.
Air cleaner filter
3.
Air cleaner case (upper)
4.
Air duct assembly
5.
Harness bracket
6.
Mass air flow sensor
7.
O-ring
8.
PCV hose
9.
Clip
10. Radiator cover grill (RH side)
11. Air duct (inlet)
12.
Radiator cover grill (LH side)
13. Resonator
14. Bracket
15.
Grommet
16. Bracket
PBIC1806E
AIR CLEANER AND AIR DUCT
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INSTALLATION
Installation is in the reverse order of removal.
CHANGING AIR CLEANER FILTER
1.
Unhook the air cleaner case (lower) side clips and lift up the air cleaner case (upper).
2.
Remove the air cleaner filter.
PBIC1165E
EM-16
INTAKE MANIFOLD COLLECTOR
Revision; 2004 April
2003 Murano
INTAKE MANIFOLD COLLECTOR
PFP:14003
Removal and Installation
ABS0032E
1.
Electric throttle control actuator
2.
Gasket
3.
Intake manifold collector (upper)
4.
PCV hose
5.
Harness bracket
6.
Gasket
7.
Power valve
8.
VIAS control solenoid valve
9.
Vacuum tank
10. Gasket
11. Intake manifold collector (lower)
12.
EVAP canister purge volume control
solenoid valve
13. Gasket
14. EVAP hose
15. Support bracket
PBIC1166E
INTAKE MANIFOLD COLLECTOR
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REMOVAL
WARNING:
To avoid the danger of being scalded, never drain the coolant when the engine is hot.
1.
Remove engine cover.
2.
Drain engine coolant, or when water hose is disconnected,
attach plug to prevent engine coolant leakage. Refer to
CAUTION:
Perform when engine is cold.
3.
Remove air duct. Refer to
4.
Remove electric throttle control actuator.
●
Loosen bolts in the reverse order of that shown in the figure.
CAUTION:
●
Handle carefully to avoid any shock to the electric throt-
tle control actuator.
●
Do not disassemble.
5.
Disconnect vacuum hose and water hose from intake manifold collector (upper and lower).
6.
Disconnect EVAP canister purge volume control solenoid valve mounting bolt from intake manifold collec-
tor (lower).
7.
Remove VIAS control solenoid valve and vacuum tank.
8.
Remove the RH windshield wiper arm and RH front cowl top cover. Refer to
9.
Disconnect the power steering hose bracket.
10. Remove intake manifold collector support bracket.
11. Remove PCV hose [between intake manifold collector (upper) and RH rocker cover].
12. Loosen bolts in reverse order of illustration with power tool, and
remove intake manifold collector (upper and lower) assembly
with power tool.
PBIC1167E
SEM711G
SEM713G
EM-18
INTAKE MANIFOLD COLLECTOR
Revision; 2004 April
2003 Murano
13. Loosen bolts in reverse order of illustration to remove intake
manifold collector (upper) with power tool.
14. Remove power valve in reverse order of illustration.
INSPECTION AFTER REMOVAL
Surface Distortion
●
Using straightedge and feeler gauge, inspect the surface distor-
tion of intake manifold collector (lower).
●
If it exceeds the limit, replace the intake manifold collector.
INSTALLATION
●
Install in the reverse order of removal paying attention to the following.
Installation of Power Valve
●
Tighten in numerical order as shown in the figure.
SEM712G
SEM714G
Limit
: 0.1 mm (0.004 in)
PBIC1168E
: 17.6 - 21.6 N·m (1.8 - 2.2 kg-m, 13 - 15 ft-lb)
SEM714G
INTAKE MANIFOLD COLLECTOR
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Installation of Intake Manifold Collector (Upper)
●
Tighten in numerical order as shown in the figure.
Installation of Intake Manifold Collector (Lower)
●
Tighten in numerical order as shown in the figure.
NOTE:
Tighten mounting bolts to secure gasket (lower), intake manifold col-
lector (lower), gasket (upper).
Installation of Electric Throttle Control Actuator
●
Install gasket with three protrusions for installation check facing any direction other than upward or down-
ward.
●
Tighten in numerical order as shown in the figure.
●
Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of the electric throttle control actuator is discon-
nected. Refer to
EC-64, "Throttle Valve Closed Position
●
Perform the “Idle Air Volume Learning” and “Throttle Valve
Closed Position Learning” when the electric throttle control actu-
ator is replaced. Refer to
EC-64, "Idle Air Volume Learning"
: 17.6 - 21.6 N·m (1.8 - 2.2 kg-m, 13 - 15 ft-lb)
SEM712G
: 17.6 - 21.6 N·m (1.8 - 2.2 kg-m, 13 - 15 ft-lb)
SEM713G
: 7.2 - 9.6 N·m (0.74 - 0.97 kg-m, 64 - 84 in-lb)
SEM711G
EM-20
INTAKE MANIFOLD
Revision; 2004 April
2003 Murano
INTAKE MANIFOLD
PFP:14003
Removal and Installation
ABS0033D
REMOVAL
1.
Release fuel pressure. Refer to
EC-66, "FUEL PRESSURE RELEASE"
2.
Remove intake manifold collector (upper and lower). Refer to
EM-16, "INTAKE MANIFOLD COLLECTOR"
.
3.
Remove fuel tube and fuel injector assembly. Refer to
EM-38, "FUEL INJECTOR AND FUEL TUBE"
4.
Loosen bolts and nuts in reverse order of illustration to remove
intake manifold assembly with power tool.
INSPECTION AFTER REMOVAL
Surface Distortion
●
Using straightedge and feeler gauge, inspect the surface distor-
tion of each surface on intake manifold.
●
If it exceeds the limit, replace the intake manifold.
1.
Intake manifold
2.
Gasket
PBIC1169E
PBIC0778E
Limit
: 0.1 mm (0.04 in)
PBIC0870E
INTAKE MANIFOLD
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INSTALLATION
Install in the reverse order of removal paying attention to the following.
Installation of Intake Manifold
●
If stud bolts were removed, install them and tighten to the torque
specified below.
●
Tighten all mounting bolts and nuts to specified torque in two or
more steps in numerical order shown in figure.
: 9.8 - 11.8 N·m (1.0 - 1.2 kg-m, 87 - 104 in-lb)
1st step
: 4.9 - 9.8 N·m (0.5 - 1.0 kg-m, 4 - 7 ft-lb)
2nd step and after
: 26.5 - 31.4 N·m (2.7 - 3.2 kg-m, 20 - 23 ft-lb)
PBIC0778E
EM-22
EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision; 2004 April
2003 Murano
EXHAUST MANIFOLD AND THREE WAY CATALYST
PFP:14004
Removal and Installation
ABS0032G
REMOVAL
WARNING:
●
Perform the work when the exhaust and cooling system have completely cooled down.
●
When removing the engine mounting through bolts and nuts, lift the engine up slightly for safety
with a transmission jack. Refer to
.
1.
Remove the exhaust front tube. Refer to
EX-3, "Removal and Installation"
2.
Remove rear engine mount insulator (2WD models) (when RH exhaust manifold and three way catalyst is
removed). Refer to
.
3.
Remove the RH windshield wiper arm and RH front cowl top cover (when RH exhaust manifold and three
way catalyst is removed). Refer to
1.
Heated oxygen sensor 1 (bank 1)
2.
Exhaust manifold cover
3.
Exhaust manifold (RH bank)
4.
Gasket
5.
Gasket
6.
Three way catalyst (manifold) (RH
bank)
7.
Heated oxygen sensor 2 (bank 1)
8.
Support (RH)
9.
Three way catalyst heat shield
10.
Three way catalyst (manifold) (LH
bank)
11. Heated oxygen sensor 2 (bank 2)
12. Support (LH)
13. Exhaust manifold cover
14. Exhaust manifold (LH bank)
15. Heated oxygen sensor 1 (bank 2)
PBIC1170E
EXHAUST MANIFOLD AND THREE WAY CATALYST
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4.
Remove heated oxygen sensor 1 and 2 on both LH and RH
bank.
a.
Remove harness connector of each heated oxygen sensor, and
disconnect the harness from the bracket and middle clamp.
b.
Remove both heated oxygen sensors with heated oxygen sen-
sor wrench [special service tool: KV10117100 (J3647-A) or
KV10117200 (J38365)].
CAUTION:
●
Be careful not to damage heated oxygen sensor.
●
Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; replace with a new sensor.
5.
Remove the exhaust manifold covers and the three way catalyst heat shields.
6.
Remove bolts in the reverse order of illustration to remove three
way catalyst supports (RH and LH).
7.
Remove the three way catalyst (manifold) (RH bank) and three way catalyst (manifold) (LH bank) by loos-
ening the bolts first and then removing the nuts.
8.
Remove the exhaust manifolds.
●
Loosen the nuts in the reverse order as shown.
PBIC1182E
PBIC1174E
PBIC1171E
PBIC1172E
EM-24
EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision; 2004 April
2003 Murano
INSPECTION AFTER REMOVAL
Surface Distortion
●
Use a reliable straightedge and feeler gauge to check the flat-
ness of the exhaust manifold mating surfaces.
●
If it exceeds the limit, replace the exhaust manifold.
INSTALLATION
Installation is in the reverse order of removal paying attention to the following.
CAUTION:
●
When using the heated oxygen sensor wrench [special service tool: KV10117200 (J38365)], tighten
to the middle of specified torque range, because the length of the tool may increase the actual
tightness. Do not tighten to the maximum specified torque range.
●
Before installing a heated oxygen sensor, clean the threads on the exhaust manifold using the
oxygen sensor thread cleaner tool (commercial service tool), and apply anti-seize lubricant.
●
Do not over-torque the heated oxygen sensors. Doing so may cause damage to the heated oxygen
sensors.
Exhaust Manifold
●
Install the exhaust manifold nuts in the numerical order as
shown.
Limit
: 0.3 mm (0.012 in)
PBIC1173E
PBIC1171E
PBIC1172E
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