2003 NISSAN X-TRAIL sensor

EM-22
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EXHAUST MANIFOLD AND THREE WAY CATALYST
EXHAUST MANIFOLD AND THREE WAY CATALYST
PFP:14004
Removal and InstallationEBS00BL7
REMOVAL
1. Remove heated oxygen sensors.
lFollow below steps to remove each heated oxygen sensor.
a. Remove engine under cover.
b. Remove harness connector of each heated oxygen sensor, and harness from bracket and middle clamp.
c. Using heated oxygen sensor wrench, remove heated oxygen
sensors.
CAUTION:
lBe careful not to damage heated oxygen sensor.
lDiscard 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; use a new one.
2. Remove exhaust manifold and three way catalyst assembly.
a. Remove exhaust manifold cover lower.
b. Remove exhaust front tube. Refer toEX-2, "
EXHAUST SYS-
TEM".
PBIC0279E
1Exhaust manifold and three way cata-
lyst assembly2 Gasket 3 Exhaust manifold cover
4 Heated oxygen sensor 1 5 Heated oxygen sensor 2
KBIA0094E

EXHAUST MANIFOLD AND THREE WAY CATALYST
EM-23
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c. Remove exhaust manifold cover upper.
d. Loosen nuts in reverse order of illustration to remove exhaust
manifold and catalytic converter.
lDisregard the numerical order No.6 and 7 when loosening.
3. Remove exhaust manifold and three way catalyst loosening nuts
in reverse order in the figure.
INSPECTION AFTER REMOVAL
Surface Distortion
lUse a reliable straightedge and feeler gauge to check the flat-
ness of exhaust manifold fitting surface.
INSTALLATION
lInstall in the reverse order of removal paying attention to the following.
Tightening Exhaust Manifold Nuts
lTighten nuts in the numerical order shown in the figure.
lNo.6 and 7 indicate double tightening of bolts 1 and 3.
Installation of Heated Oxygen Sensor
CAUTION:
lDo not over torque the heated oxygen sensor. Doing so may cause damage to the heated oxygen
sensor, resulting in the MIL coming on.
KBIA0045E
Standard : 0.3mm (0.012in)
KBIA0046E
KBIA0045E

CAMSHAFT
EM-33
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CAMSHAFTPFP:13001
Removal and InstallationEBS009R0
CAUTION:
Apply new engine oil to parts marked in illustration before installation.
REMOVAL
lThe following procedure describes removing and installing camshaft without removing front cover. If the
front cover is removed or installed, removal of No.1 camshaft bracket is easier before step 8. Installation is
easier after step 3. Regarding removal and installation of front cover, refer toEM-43, "
TIMING CHAIN".
1. Release fuel pressure. Refer toEC-34, "
FUEL PRESSURE RELEASE",EC-399, "FUEL PRESSURE
RELEASE".
2. Remove parts listed below.
lIgnition Coil; Refer toEM-27, "Removal and Installation".
lRocker cover; Refer toEM-31, "Removal and Installation".
3. Remove power steering reservoir tank.
4. Remove Intake valve timing control cover.
KBIA0244E
1 Camshaft bracket 2 Washer 3 Front cover
4 Chain guide 5 Chain tensioner 6 O-ring
7 Spring 8 Chain tensioner plunger 9Intake valve timing control solenoid
valve
10 Intake valve timing control cover 11 Camshaft sprocket (EXH) 12 Camshaft sprocket (INT)
13 Valve lifter 14 Camshaft (EXH) 15 Camshaft (INT)
16 Camshaft position sensor (PHASE)

CAMSHAFT
EM-35
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c. Secure hexagonal part of camshaft with a tool such as a span-
ner. Loosen camshaft sprocket mounting bolts and remove the
camshaft sprockets.
CAUTION:
lDo not rotate crankshaft or camshaft while timing chain is
removed. It causes interference between valve and piston.
NOTE:
lChain tension holding work is not necessary. Crank sprocket
and timing chain do not disconnect structurally while front cover
is attached.
8. Loosen mounting bolts in the reverse order shown in the figure,
and remove camshaft brackets and camshafts.
lRemove No.1 camshaft bracket by slightly tapping it with a
soft tool such as a plastic hammer.
9. Remove valve lifter.
lCheck mounting positions, and store them without mixing
them up.
INSTALLATION
1. Install valve lifter.
lInstall them in the same positions they were in prior to removal.
2. Install camshaft.
lDistinction between intake and exhaust camshafts is performed with a difference of shapes of rear end.
Intake : Signal plate shape for camshaft position (PHASE) sensor.
Exhaust : Cone end shape.
lInstall camshafts so that knock pins on the front side are posi-
tioned as shown in the figure.
KBIA0049E
KBIA0245E
KBIA0246E
KBIA0051E

EM-62
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ENGINE ASSEMBLY
1. Release fuel pressure. Refer toEC-34, "FUEL PRESSURE RELEASE"(WITH EURO-OBD),EC-399,
"FUEL PRESSURE RELEASE"(WITHOUT EURO-OBD).
2. Remove engine hood.
3. Drain coolant from radiator drain plug.
4. Remove the following parts.
lLH/RH under cover
lLH/RH Front wheel
lBattery
lAuxiliary drive belt; Refer toEM-14, "Removal and Installation of Auxiliary Drive Belt Auto- tensioner".
lAir duct and air cleaner case assembly; Refer toEM-15, "Removal and Installation".
lAlternator
lRadiator and radiator fan assembly; Refer toCO-12, "RADIATOR".
5. Disconnect engine room harness from the engine side and set it aside for easier work.
6. Disconnect all the body-side vacuum hoses and air hoses at engine side.
Engine room LH
7. Disconnect fuel hose, and plug it to prevent fuel from draining. Refer toEM-17, "
INTAKE MANIFOLD"
8. Disconnect heater hose, and install plug it to prevent engine coolant from draining.
9. Disconnect select cable from transaxle (A/T models).
10. Remove clutch operating cylinder from transaxle, and move it aside (M/T models).
11. Disconnect shift cable from transaxle (M/T models).
Engine room RH
12. Remove engine coolant reservoir tank.
13. Remove air conditioner compressor with piping connected from engine. Temporarily secure it on body
with a rope to avoid putting load on it.
Vehicle underbody
14. Remove exhaust front tube.
15. Remove propeller shaft.
16. Remove steering shaft from steering gear.
17. Disconnect power steering fluid cooler piping at a point between body and engine.
18. Remove ABS sensor from brake caliper.
19. Remove brake caliper with piping connected from steering knuckle. Temporarily secure it on body with a
rope to avoid load on it.
20. Remove LH/RH suspension from steering knuckle under strut.
Removal
21. Install engine slingers into front left of cylinder head and rear right of cylinder head.
lUse alternator bracket mounting bolt holes for the frontside.
22. Lift with hoist and secure the engine in position.Slinger bolts:
Front: 51.0 - 64.7 N·m (5.2 - 6.6 kg-m, 38 - 47 ft-lb)
Rear: 24.5 - 31.4 N·m (2.5 - 3.2 kg-m, 18 - 23 ft-lb)
KBIA0255E

EM-64
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CYLINDER BLOCK
CYLINDER BLOCK
PFP:11010
Disassembly and AssemblyEBS009R8
KBIA0258E
1 Cylinder block 2 O-ring 3 Crankshaft position sensor (POS)
4 Knock sensor 5 Oil pressure switch 6 Lower cylinder block
7 Lower cylinder block bolt 8 Snap ring 9 Connecting rod
10 Connecting rod bearing 11 Connecting rod bearing cap 12 Connecting rod bolt
13 Piston 14 Oil ring 15 Second ring
16 Top ring 17 Piston pin 18 Thrust bearing
19 Main bearing upper 20 Crankshaft 21 Main bearing lower
22 Rear oil seal 23 Pilot convertor 24 Signal plate
25 Drive plate 26 Reinforce plate 27 Flywheel

EM-66
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CYLINDER BLOCK
lA commercial engine stand can be used.
NOTE:
lThis example is an engine stand for holding at transaxle
mounting side with the flywheel or drive plate removed.
3. Drain engine oil and coolant from inside of engine.
4. Remove the following components and associated parts.
lExhaust manifold and three way catalyst assembly; Refer to
EM-22, "
Removal and Installation".
lIntake manifold collector; Refer toEM-17, "Removal and
Installation".
lIntake manifold and fuel tube assembly; Refer toEM-17,
"Removal and Installation".
lIgnition coil; Refer toEM-27, "Removal and Installation".
lRocker cover; Refer toEM-31, "Removal and Installation".
lOil pan and oil strainer; Refer toEM-24, "Removal and Installation".
lFront cover, timing chain and balancer unit; Refer toEM-43, "Removal and Installation".
lCamshaft; Refer toEM-33, "Removal and Installation".
lCylinder head; Refer toEM-53, "Removal and Installation".
5. Remove knock sensor.
CAUTION:
Carefully handle the sensor avoiding shocks.
6. Remove crankshaft position sensor (POS).
CAUTION:
lAvoid impacts such as a dropping.
lDo not disassemble.
lKeep it away from metal particles.
lDo not place sensor close to magnetic materials.
7. Remove flywheel (M/T models) or drive plate (A/T models). Fix crankshaft with a stopper plate, and
remove mounting bolts.
Torx bit (size T55) : Flywheel (M/T models)
Torx socket (size E20): Drive plate (A/T models)
CAUTION:
lBe careful not to damage contact surface for the clutch
disc of the flywheel.
NOTE:
lThe flywheels, two block construction, allows movement in
response to transmission side pressure, or when twisted in its
rotational direction. Therefore, some amount of noise is nor-
mal.
PBIC0085E
KBIA0141E
KBIA0062E

CYLINDER BLOCK
EM-73
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16. Install flywheel (M/T models) or drive plate (A/T models).
lInstall drive plate, reinforcement plate and pilot converter as
showninfigure.
lUsing drift of 33 mm (1.30 in) in diameter, push pilot converter
into the end of crankshaft.
17. Install knock sensor.
lMake sure that there is no foreign material on the cylinder
block mating surface and the back surface of the knock sen-
sor.
lInstall sensor with connector facing lower left by 45°as show.
lDo not tighten the mounting bolts while holding the connector.
lMake sure that the knock sensor does not interfere with other-
parts.
CAUTION:
If any impact by dropping is applied to the knock sensor,
replace it with new one.
18. Install crankshaft position (POS) sensor.
19. Install followings in reverse order of removal.
How to Select Piston and BearingEBS009R9
DESCRIPTION
*For the service parts, the grade for fitting cannot be selected between a piston pin and a connecting rod.
(Only 0 grade is available.) The information at the shipment from the plant is described as a reference.
lThe identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.
lFor reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table.
lFor details of the measurement method of each part, the reuse standards and the selection method of the
selective fitting parts, refer to the text.
KBIA0075E
KBIA0069E
Selection points Selection parts Selection items Selection methods
Between cylinder block to
crankshaftMain bearingMain bearing grade (bearing
thickness)Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)
Between crankshaft to connect-
ing rodConnecting rod bearingConnecting rod bearing grade
(bearing thickness)Combining service grades for
connecting rod big end inner
diameter and crankshaft pin
outer diameter determine con-
necting rod bearing selection.
Between cylinder block to pis-
tonPiston and piston pin assembly
Thepistonisavailabletogether
with piston pin as an assembly.Piston grade (piston outer
diameter)Piston grade = cylinder bore
grade (inner diameter of bore)
*Between piston to connecting
rod———