NISSAN X-TRAIL 2001 Service Manual PDF

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
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Use the Chart Below to Help You Find the Cause of the Symptom.EBS00L7Q
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
Top of
engine
Rocker
cover
Cylinder
headTicking or
clickingCA—AB—Tappet
noiseValve clearanceEM-53
Rattle C A — A B CCamshaft
bearing
noiseCamshaft journal clear-
ance
Camshaft runoutEM-51EM-51
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 oil clearance (Small
end)EM-89
EM-91
Slap or
rapA ——BBAPiston
slap noisePiston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsionEM-94EM-90
EM-90
EM-91
Knock A B C B B BConnect-
ing rod
bearing
noiseConnecting rod bush-
ing oil clearance (Small
end)
Connecting rod bear-
ing clearance (Big end)EM-91EM-91
Knock A B — A B CMain
bearing
noiseMain bearing oil clear-
ance
Crankshaft runoutEM-95EM-95
Front of
engine
Timing
chain
coverTapping or
tickingA A —BBBTiming
chain and
chain ten-
sioner
noiseTiming chain cracks
and wear
Timing chain tensioner
operationEM-37
Front of
engineSqueak-
ing or fizz-
ingAB—B—CDrive belts
(Sticking
or slip-
ping)Drive belts deflection
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CreakingA B ABABDrive belts
(Slipping)Idler pulley bearing
operation
Squall
CreakA B —BABWater
pump
noiseWater pump operationCO-18,
"WATER
PUMP"

EM-12
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DRIVE BELTS
DRIVE BELTS
PFP:02117
Checking Drive BeltsEBS00KN7
WARNING:
Be sure to perform when the engine is stopped.
●Make sure that the indicator (single line notch on fixed side) of drive belt auto-tensioner is within the pos-
sible use range (between three line notches on moving side).
NOTE:
●Check the drive belt auto-tensioner indicator (single line notch on fixed side) when the engine is cold.
●When the new drive belt is installed, the indicator (single line notch on fixed side) should be within the
range A.
●Visually check entire belt for wear, damage or cracks.
●If the indicator (single line notch on fixed side) is out of possible use range or belt is damaged, replace the
belt.
Tension AdjustmentEBS00KN8
Belt tensioning is not necessary, as it is automatically adjusted by drive belt auto-tensioner.
Removal and InstallationEBS00KN9
REMOVAL
1. Remove splash cover on RH undercover.
2. With box wrench, and while securely holding the hexagonal part
in pulley center of drive belt auto-tensioner, move the wrench
handle in the direction of arrow (loosening direction of ten-
sioner).
CAUTION:
Avoid placing hand in a location where pinching may occur
if the holding tool accidentally comes off.
3. Insert a rod approximately 6 mm (0.24 in) in diameter into retain-
ing boss to fix auto-tensioner pulley.
●Leave auto-tensioner pulley arm locked until belt is installed
again.
4. Loosen drive belt from water pump pulley in sequence, and remove it.
PBIC1234E
KBIA0088E

DRIVE BELTS
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INSTALLATION
1. With box wrench, and while securely holding the hexagonal part in pulley center of drive belt auto-ten-
sioner, 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.
2. Insert a rod approximately 6 mm (0.24 in) in diameter into retaining boss to fix auto-tensioner pulley.
3. Hook drive belt onto all pulleys except for water pump. Hook drive belt onto water pump pulley at the end.
CAUTION:
Confirm belts are completely set to pulleys.
4. Release auto-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 to EM-12, "
Checking Drive
Belts" .
Removal and Installation of Drive Belt Auto-TensionerEBS00KNA
REMOVAL
1. Remove splash cover on RH undercover.
2. Remove drive belt.
●Keep auto-tensioner pulley fixed with a tool such as a short-length screwdriver.
3. Remove drive belt auto-tensioner.
●Remove and install drive belt auto-tensioner by fixing auto-tensioner pulley.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
Install drive belt auto-tensioner carefully not to damage the water pump pulley.
SBIA0235E

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AIR CLEANER AND AIR DUCT
AIR CLEANER AND AIR DUCT
PFP:16500
Removal and InstallationEBS00KNB
REMOVAL
1. Remove mass air flow sensor harness clamp.
2. Disconnect harness connector from mass air flow sensor.
3. Remove air duct, air cleaner case/ mass air flow sensor.
●Add 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.
●Do not shock it.
●Do not disassembly it.
●Do not touch its sensor.
5. Remove resonator in fender lifting left fender protector.
INSTALLATION
1. Attach each joint aligning marks put at removal. Screw clamps firmly.
2. Install in the reverse order of removal.
PBIC1136E
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 filter

AIR CLEANER AND AIR DUCT
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CHANGING AIR CLEANER FILTER
1. Remove clips and lift up air cleaner upper case.
2. Remove air cleaner filter.

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INTAKE MANIFOLD
INTAKE MANIFOLD
PFP:14003
Removal and InstallationEBS00KNC
QR20DE
PBIC1260E
1. Bracket 2. PCV hose 3. Intake manifold collector
4. Gasket 5. Electric throttle control actuator 6. Intake manifold support
7.EVAP canister purge volume control
solenoid valve8. Vacuum hose 9. Intake manifold
10. Ground cable

INTAKE MANIFOLD
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QR25DE
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain the coolant when the engine is hot.
1. Disconnect mass air flow sensor harness connector from mass air flow sensor and clamp.
2. Release fuel pressure. Refer to EC-775, "
FUEL PRESSURE RELEASE" [QR20DE (WITH EURO-OBD)],
EC-1139, "
FUEL PRESSURE RELEASE" [QR20DE (WITHOUT EURO-OBD)], EC-42, "FUEL PRES-
SURE RELEASE" [QR25DE (WITH EURO-OBD)] or EC-452, "FUEL PRESSURE RELEASE" [QR25DE
(WITHOUT EURO-OBD)].
3. Remove air cleaner case and air duct assembly. Refer to EM-14, "
AIR CLEANER AND AIR DUCT" .
4. Drain coolant when engine is cooled. Refer to CO-9, "
DRAINING ENGINE COOLANT" .
SBIA0229E
1. Bracket 2. PCV hose 3. Intake manifold collector
4. Gasket 5. Electric throttle control actuator 6. Intake manifold support
7.EVAP canister purge volume control
solenoid valve8. Vacuum hose 9. Intake manifold
10. Vacuum reservoir tank 11. VIAS control solenoid valve

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INTAKE MANIFOLD
5. Disconnect fuel hose quick connector on engine side.
●Using 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:
●Pull quick connector holding A position in illustration.
●Do not pull with lateral force applied. O-ring inside quick connector may be damaged.
●Prepare container and cloth beforehand as fuel will leak out.
●Avoid fire and sparks.
●Be sure to cover openings of disconnected pipes with plug or plastic bag to avoid fuel leakage
and entry of foreign materials.
6. Disconnect fuel hose quick connector at vehicle piping side, perform as follows.
a. Remove quick connector cap.
b. Hold the sides of the connector, push in tubs and pull out the
tube. (The figure is shown for reference only.)
●If the connector and the tube are stuck together, push and pull
several times until they start to move. Then disconnect them
by pulling.
CAUTION:
●The quick connector can be disconnected when the
tabs are completely depressed. Do not twist it more
than necessary.
●Do not use any tools to disconnect the quick connec-
tor.
●Keep the resin tube away from heat. Be especially careful when welding near the tube.
●Prevent acid liquid such as battery electrolyte etc. from getting on the resin tube.
KBIA0268E
KBIA0702E
KBIA0701E
SFE562A

INTAKE MANIFOLD
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●Do not bend or twist the tube during installation and removal.
●Do not remove the remaining retainer on tube.
●When the tube is replaced, also replace the retainer with a new one.
●To keep clean the connecting portion and to avoid
damage and foreign materials, cover them completely
with plastic bags or something similar.
7. Loosen mounting bolts diagonally in reverse order shown, and
remove electric throttle control actuator.
CAUTION:
●Handle carefully to avoid any shock.
●Do not disassemble.
8. Disconnect intake manifold collector harness, vacuum hose, and PCV hose.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
9. Remove intake manifold collector mounting bolts on the support.
For QR20DE
Loosen mounting bolts and nuts in order from No. 5 to 1, and
remove intake manifold collector.
●Disregard No. 6 when loosening.
For QR25DE
Loosen mounting bolts and nuts in order from No. 7 to 1, and
remove intake manifold collector.
●Disregard No. 8 when loosening.
10. Disconnect harness and power steering piping from intake man-
ifold and fuel tube assembly, and move them a side.
11. Remove intake manifold mounting bolts on the support.
PBIC0163E
EMJ1612D
KBIA0234E
SBIA0230E

EM-20
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INTAKE MANIFOLD
For QR20DE
Loosen mounting bolts and nuts in order from No. 5 to 1, and
remove intake manifold assembly.
●Disregard No. 6 when loosening.
For QR25DE
Loosen mounting bolts and nuts in order from No. 5 to 1, and
remove intake manifold assembly.
●Disregard No. 6 when loosening.
INSPECTION AFTER REMOVAL
Surface Distortion
Using straightedge and feeler gauge, inspect surface distortion of
intake manifold collector and intake manifold surface.
INSTALLATION
Install in the reverse order of removal paying attention to the following.
Intake Manifold Bolts and Nuts
For QR20DE
Tighten in numerical order as shown in the figure.
NOTE:
No. 6 means double tightening of bolt No. 1.
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SBIA0231E
Standard: 0.1 mm (0.004 in)
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