NISSAN X-TRAIL 2003 Electronic Repair Manual

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
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NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting —Engine NoiseEBS009QM
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NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
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.
A: Closely related B: Related C: Sometimes related —: Not relatedLocation
of noiseType of
noiseOperating condition of engine
Source of
noiseCheck itemRefer-
ence page Before
warm-
upAfter
warm-
upWhen
start-
ingWhen
idlingWhen
racingWhile
driving
To p o f
engine
Rocker
cover
Cylinder
headTick ing or
clickingCA—AB—Tappet
noiseValve clearanceEM-40
Rattle C A — A B CCamshaft
bearing
noiseCamshaft journal clear-
ance
Camshaft runoutEM-38EM-38
Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil panSlap or
knock—A—BB—Piston pin
noisePiston and piston pin
clearance
Connecting rod bush-
ing clearanceEM-83
EM-83
Slap or
rapA ——BBAPiston
slap noisePiston-to-bore clear-
ance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsionEM-82EM-82
EM-82
EM-82
Knock A B CBBBConnect-
ing rod
bearing
noiseConnecting rod bush-
ing clearance (Small
end)
Connecting rod bear-
ing clearance (Big end)EM-83EM-83
Knock A B — A B CMain
bearing
noiseMain bearing oil clear-
ance
Crankshaft runoutEM-88EM-87
Front of
engine
Timin g
chain
coverTa p p i n g o r
tickingA A —BBBTiming
chain and
chain ten-
sioner
noiseTiming chain cracks
and wear
Timing chain tensioner
operationEM-47
EM-43
Front of
engineSqueak-
ing or fizz-
ingAB—B—CDrive belts
(Sticking
or slip-
ping)Drive belts deflection
EM-13
CreakingA B ABABDrive belts
(Slipping)Idler pulley bearing
operation
Squall
CreakA B —BABWater
pump
noiseWater pump operationCO-19,
"WATER
PUMP"

DRIVE BELTS
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DRIVE BELTSPFP:02117
Checking Drive BeltsEBS009QO
WA RN ING:
Be sure to perform when the engine is stopped.
lMake sure that the stamp mark of auxiliary drive belt auto-tensioner is within the usable range.
NOTE:
lCheck the automatic tensioner indication when the engine is cold.
lWhen the new drive belt is installed, the range should be A.
lVisually check entire belt for wear, damage or cracks.
lIf the indicator is out of allowable use range or belt is damaged, replace the belt.
Tension AdjustmentEBS009QP
lBelt tensioning is not necessary, as it is automatically adjusted by auto-tensioner.
Removal and InstallationEBS009QQ
REMOVAL
1. Remove front RH engine side cover.
2. With box wrench, and while securely holding the hexagonal part
in pulley center of automatic tensioner, move the wrench handle
in the direction of arrow (loosening direction of tensioner).
CAUTION:
Avoid placing hand in a location where pinching may occur
if the holding tool accidentally comes off.
3. Insert a rod approximately 6mm (0.24in) in diameter through the
rear of engine into holding boss to fix tensioner pulley.
lLeave tensioner pulley arm locked until belt is installed again.
4. Loosen auxiliary drive belt from water pump pulley in sequence,
and remove it.
INSTALLATION
1. With box wrench, and while securely holding the hexagonal part in pulley center of automatic tensioner,
move the wrench handle in the direction of arrow [loosening direction of tensioner].
CAUTION:
Avoid placing hand in a location where pinching may occur if the holding tool accidentally comes off.
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DRIVE BELTS
2. Insert a rod approximately 6 mm (0.24in) in diameter through the rear of engine into holding boss to fix
tensioner pulley.
3. Hook auxiliary drive belt onto all pulleys except for water pump. Hook belt onto water pump pulley at the
end.
CAUTION:
Confirm belts are completely set to pulleys.
4. Release tensioner, and apply tensions to belt.
5. Turn crankshaft pulley clockwise several times to equalize tension between each pulley.
6. Confirm tensions of belt at indicator is within the allowable use range. Refer toEM-13, "
Checking Drive
Belts".
Removal and Installation of Auxiliary Drive Belt Auto- tensionerEBS009QR
REMOVAL
1. Remove front RH engine side cover.
2. Remove auxiliary drive belt.
lKeep tensioner pulley fixed with a tool such as a short-length screwdriver.
3. Remove alternator and then auxiliary drive belt auto-tensioner.
lRemove and install auxiliary drive belt auto-tensioner by fixing tension pulley.
INSTALLATION
lInstall in the reverse order of removal.
CAUTION:
Install auxiliary drive belt auto-tensioner carefully not to damage the water pump pulley.
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AIR CLEANER AND AIR DUCT
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AIR CLEANER AND AIR DUCTPFP:16500
Removal and InstallationEBS009QS
REMOVAL
1. Remove mass air flow sensor harness clamp.
2. Remove harness connector from mass air flow sensor.
3. Remove air duct, air cleaner case/ mass air flow sensor.
lAdd marks as necessary for easier installation.
4. Remove mass air flow sensor from air cleaner case.
CAUTION:
Handle mass air flow sensor with following cares.
lDo not shock it.
lDo not disassembly it.
lDo not touch its sensor.
5. Remove resonator in fender lifting left fender protector.
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1 Air cleaner case upper 2 Clamp 3 Air duct
4 Bracket 5 Mass air flow sensor 6 O-ring
7 Grommet 8 Resonator 9 Mounting rubber
10 Air cleaner case lower 11 Air cleaner element

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AIR CLEANER AND AIR DUCT
INSTALLATION
1. Attach each joint aligning marks put at removal. Screw clamps firmly.
2. Install in the reverse order of removal.
CHANGING AIR CLEANER ELEMENT
1. Remove clips and lift up air cleaner upper case.
2. Remove air cleaner element.

INTAKE MANIFOLD
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INTAKE MANIFOLDPFP:14003
Removal and InstallationEBS009QT
REMOVAL
WA RN ING:
To avoid the danger of being scalded, never drain the coolant when the engine is hot.
1. Remove mass air flow sensor harness connector from mass air flow sensor and clamp.
2. Release fuel pressure.
Refer toEC-34, "
FUEL PRESSURE RELEASE"(WITH EURO-OBD),EC-399, "FUEL PRESSURE
RELEASE"(WITHOUT EURO-OBD).
3. Remove air cleaner case and air duct assembly.
Refer toEM-15, "
Removal and Installation".
4. Drain coolant when engine is cooled. Refer toCO-9, "
DRAINING ENGINE COOLANT".
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1 Bracket 2 PCV hose 3 Intake manifold collector
4 Gasket 5 Electric throttle control actuator 6 Intake manifold support
7EVAP canister purge volume control
solenoid valve8 Vacuum hose 9 Intake manifold

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INTAKE MANIFOLD
5. Disconnect fuel hose quick connector on engine side (The same
apply to the quick connector on vehicle side).
lUsing tool of quick connector release (here in after “release”),
perform the following steps to disconnect quick connector.
a. Remove quick connector cap.
b. With the sleeve side of release facing quick connector, install
release onto fuel tube.
c. Insert release into quick connector until sleeve contacts and
goes no further. Hold the release on that position.
CAUTION:
Inserting the release hard will not disconnect quick connec-
tor. Hold release where it contacts and goes no further.
d. Draw and pull out quick connector straight from fuel tube.
CAUTION:
lPull quick connector holding A position in illustration.
lDo not pull with lateral force applied. O-ring inside quick connector may be damaged.
lPrepare container and cloth beforehand as fuel will leak out.
lAvoid fire and sparks.
lBe sure to cover openings of disconnected pipes with plug or plastic bag to avoid fuel leakage
and entry of foreign materials.
6. Loosen mounting bolts diagonally, and remove electric throttle control actuator.
CAUTION:
Handle carefully to avoid any shock.
7. Disconnect intake manifold collector harness, vacuum hose, and PCV hose.
CAUTION:
lCover engine openings to avoid entry of foreign materials.
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INTAKE MANIFOLD
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8. Remove intake manifold collector mounting bolts on the support.
9. Loosen mounting bolts and nuts in order from 5 to 1, and
remove intake manifold collector.
lDisregard 6 when loosening.
10. Disconnect harness and power steering piping from intake man-
ifold and fuel tube assembly, and move them a side.
11. Loosen bolts in reverse order of illustration to remove intake
manifold assembly.
lDisregard No.6 when loosening.
INSPECTION AFTER REMOVAL
Surface Distortion
lUsing straightedge and feeler gauge, inspect surface distortion
of intake manifold collector and intake manifold surface.
INSTALLATION
lInstall in the reverse order of removal paying attention to the following.
Tightening Intake Manifold bolts and nuts
lTighten in numerical order as shown in the figure.
NOTE:
No.6 means double tightening of bolt 1.
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Standard : 0.1 mm (0.004 in)
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INTAKE MANIFOLD
Tightening Intake Manifold collector bolts and nuts
lTighten in numerical order as shown in the figure.
NOTE:
No.6 means double tightening of bolts 1.
Installation of Electric Throttle Control Actuator
lTighten fixing bolts of electric throttle control actuator equally and diagonally in several steps.
lAfter installation perform procedure inEM-20, "INSPECTION AFTER INSTALLATION".
Connecting Quick Connector of Fuel Hose
lInstall quick connector as follows. (The steps are the same for quick connectors on engine side and vehi-
cle)
1. Make sure no foreign substances are deposited in and around tube and quick connector and no damage
on them.
2. Thinly apply new engine oil around the fuel tube tip end.
3. Align center to insert quick connector straightly into fuel tube.
lInsert fuel tube into quick connector until the first spool on fuel
tubes is inserted completely and the second one is positioned
slightly below the quick connectors bottom end.
CAUTION:
lHold A position in illustration when inserting fuel tube
into quick connector.
lCarefully align center to avoid inclined insertion to pre-
vent damage to O-ring inside quick connector.
lInsert until you hear a “click” sound and actually feel the
engagement.
lTo avoid misidentification of engagement with a similar sound, be sure to perform the next step.
4. Before clamping fuel hose with hose clamps, pull quick connector hard by hand holding A position. Make
sure it is completely engaged (connected) so that it does not come out from fuel tube.
NOTE:
Recommended pulling force is 50 N (5.1 kg, 11.2 lb).
5. Install quick connector cap on quick connector joint.
lDirect arrow mark on quick connector cap to upper side (The
figure shows quick connector cap for engine side).
6. Install fuel hose to hose clamp.
INSPECTION AFTER INSTALLATION
lCheck connections for fuel leakage.
1. Start the engine, and run it for a few minutes with engine at idle.
2. Stop the engine, and check for fuel leakage both visually and by odor of gasoline.
NOTE:
Use mirrors for checking on invisible points.
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