2003 NISSAN X-TRAIL check engine

DRIVE BELTS
EM-13
[QR20DE]
C
D
E
F
G
H
I
J
K
L
MA
EM
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.
PBIC0256E
KBIA0088E

EM-14
[QR20DE]
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.
KBIA0092E

EM-20
[QR20DE]
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.
KBIA0234E
KBIA0272E
KBIA0298E

EM-26
[QR20DE]
OIL PAN AND OIL STRAINER
c. Tighten bolts in numerical order as shown.
lNo.10, 11and 18 indicate double tightening of bolts 1,2 and 3.
NOTE:
Refer to the below for locating bolts.
M6´20 mm (0.79 in) : No. 19, 20
M8´25 mm (0.98 in) : No. 1, 3, 4, 9
M8x45mm(1.77in):No.2,5,6,7,8,17
M8 x100mm (3.97 in) : No. 12, 13, 14, 15,16
d. Tighten transmission joint bolts.
e. Install rear plate cover.
3. Install lower oil pan.
lUse Genuine Liquid gasket or equivalent.
lTighten bolts in numerical order as shown.
4. Install oil pan drain plug.
lRefer to illustration of components of former page for installation direction of washer.
5. Install in the reverse order of removal after this step.
lPour engine oil or start engine at least 30 minutes after oil pan is installed.
INSPECTION AFTER INSTALLATION
lCheck for leakage of engine oil when engine is warmed.
KBIA0097E
KBIA0098E
KBIA0096E

EM-28
[QR20DE]
SPARK PLUG
SPARK PLUG
PFP:22401
Removal and InstallationEBS009QX
REMOVAL
1. Remove ignition coil. Refer toEM-27, "Removal and Installation".
2. Remove spark plug with suitable spark plug wrench.
INSPECTION AFTER REMOVAL
lUse standard type spark plug for normal condition.
The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions
such as.
lfrequent engine starts.
llow ambient temperatures.
The cold type spark plug is suitable when spark plug knock occurs with the standard type spark plug under
conditions such as.
lextended highway driving.
lfrequent high engine revolution.
1. Check plug gap of each spark plug. Adjust or replace if necessary.
lUse a wire brush for cleaning, if necessary.
INSTALLATION
lInstall in the reverse order of removal.
Make NGK
Standard type LFR5A-11
Hot type LFR4A-11
Cold type LFR6A-11
SEM294A
Gap :
1.0 - 1.1mm (0.039 - 0.043 in)
SMA476
: 19.6 - 29.4 N·m (2.0 - 3.0 kg-m, 15 - 21 ft-lb)

EM-30
[QR20DE]
FUEL INJECTOR AND FUEL TUBE
INSTALLATION
1. Install O-rings to fuel injector paying attention to the items below.
lLubricate O-rings by smearing new engine oil.
lBe careful not to scratch it with a tool or fingernails during installation. Also be careful not to twist
or stretch O-ring. If O-ring was stretched while it is attached, do no insert it into fuel tube immedi-
atly.
2. Install fuel injector to fuel tube with the following procedure.
lInsert clip into clip mounting groove on fuel injector.
lInsert clip so that projection A of fuel injector matches notch A of
the clip.
lDo not reuse clip. Replace it with a new one.
lBe careful to keep clip from interfering with O-ring. If interfer-
ence occurs, replace O-ring.
3. Insert fuel injector into fuel tube with clip attached.
lInsertitwhilematchingittotheaxialcenter.
lInsert fuel injector so that projection B of fuel injector matches
notch B of the clip.
lMake sure that fuel tube flange is securely fixed in flange fixing
groove on clip.
lMake sure that installation is complete by checking that fuel
injector does not rotate or come off.
4. Install fuel tube assembly with the following procedure.
a. Insert the tip of each fuel injector into intake manifold.
b. Tighten mounting bolts in two steps in the numerical order
shown in the figure.
5. Install intake manifold collector. Refer toEM-17, "
INTAKE MANI-
FOLD".
6. Connect fuel hose. Refer toEM-17, "
INTAKE MANIFOLD".
7. Install all removed parts in the reverse order of removal.
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.
CAUTION:
Do not touch the engine immediately after stopped as engine becomes extremely hot.
KBIA0240E
1st step: 9.3 - 10.8 N·m (0.95 - 1.1 kg-m, 0.7 - 0.8 ft-lb)
2nd step: 20.6 - 26.5 N·m (2.1 - 2.7 kg-m, 16 - 19 ft-lb)
KBIA0239E

EM-40
[QR20DE]
CAMSHAFT
ValveLifterHoleDiameter
lUsing inside micrometer, measure diameter of valve lifter hole of
cylinder head.
Calculation of Valve Lifter Clearance
(Valve lifter clearance) = (hole diameter of valve lifter) – (outer diam-
eter of valve lifter).
lWhen out of specified range, referring to each specification of outer and inner diameter, replace either or
both valve lifter and cylinder head.
Valve ClearanceEBS009R1
INSPECTION
lPerform inspection as follows after removal, installation or replacement of camshaft or valve-related parts,
or if there is unusual engine conditions due to changes in valve clearance over time (starting, idling, and/
or noise).
1. Warm up engine. Then stop it.
2. Remove front RH engine side cover.
3. Remove rocker cover.
Refer toEM-31, "
Removal and Installation".
4. Turn crankshaft pulley in normal direction (clockwise when
viewed from front) to align TDC identification notch (without
paint mark) with timing indicator.
5. At this time, check that the both intake and exhaust cam noses
of No. 1 cylinder face outside.
lIf they do not face outside, turn crankshaft pulley once more. Standard:
34.000 - 34.021 mm (1.3386 - 1.3394 in)
Standard:
0.020 - 0.056 mm (0.0008 - 0.0022 in)
PBIC0043E
KBIA0190E
KBIA0400J

CAMSHAFT
EM-41
[QR20DE]
C
D
E
F
G
H
I
J
K
L
MA
EM
6. By referring to the figure, measure valve clearances at locations
marked X as shown in the table below (locations indicated with
black arrow in figure) with a feeler gauge.
lNo.1 cylinder compression TDC.
lUse a feeler gauge, measure clearance between valve and camshaft.
*Reference data at approximately 20°C(68°F)
CAUTION:
If inspection was carried out with cold engine, check that values with fully warmed up engine are still
within specifications.
7. Turn crankshaft one revolution (360°) and align mark on crankshaft pulley with pointer.
8. By referring to the figure, measure valve clearances at locations
marked X as shown in the table below (locations indicated with
black arrow in figure).
lNo.4 cylinder compression TDC.
9. If out of specifications, adjust as follows.
ADJUSTMENT
lPerform adjustment depending on selected head thickness of valve lifter.
lThe specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differ-
ences caused by temperature. Use the specifications for hot engine condition to adjust.
1. Remove camshaft. Refer toEM-33, "
Removal and Installation".
2. Remove the valve lifters at the locations that are outside the standard.
KBIA0248E
Cylinder No.1 No.2 No.3 No.4
Valve INT EXH INT EXH INT EXH INT EXH
Measurable´´´x
KBIA0185E
Valve clearance standard:
Hot Intake : 0.32 - 0.40 mm (0.013 - 0.016 in)
Exhaust : 0.33- 0.41 mm (0.013 - 0.016 in)
Cold* Intake : 0.24 - 0.32 mm (0.009- 0.013 in)
Exhaust : 0.26- 0.34 mm (0.010 - 0.013 in)
Cylinder No.1 No.2 No.3 No.4
Valve INT EXH INT EXH INT EXH INT EXH
Measurable x´x´
KBIA0249E