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Nissan Murano Z50 (2003 year). Manual - part 126

EXHAUST MANIFOLD AND THREE WAY CATALYST

EM-25

Revision; 2004 April

2003 Murano

Three Way Catalyst Supports

Install in the numerical order as shown.

: 19 - 25 N·m (2.0 - 2.5 kg-m, 14 - 18 ft-lb)

PBIC1174E

EM-26

OIL PAN AND OIL STRAINER

Revision; 2004 April

2003 Murano

OIL PAN AND OIL STRAINER

PFP:11110

Removal and Installation

ABS0036T

REMOVAL
2WD Model

WARNING:

Do not remove the oil pan until the exhaust system and cooling system have completely cooled off.

CAUTION:

When removing the upper oil pan from the engine, first remove the crankshaft position sensor (POS).
Be careful not to damage sensor edges or signal plate teeth.

Remove splash guard (RH).

Remove the front RH road wheel and tire with power tool.

Drain engine oil. Refer to

LU-8, "Changing Engine Oil"

Drain engine coolant. Refer to

CO-8, "Changing Engine Coolant"

CAUTION:

●

Perform when engine is cold.

●

Do not spill engine coolant on the drive belts.

Remove oil filter. Refer to

LU-9, "OIL FILTER"

CAUTION:

Do not spill engine oil on the drive belts.

Gasket

Upper oil pan

Baffle plate

O-ring

Oil pressure switch

Relief valve

Oil cooler

Oil cooler connector

Oil filter

10. Gasket

11.

Oil strainer

12. Gasket

13. Drain plug

14. Lower oil pan

15. Rear cover plate

16.

Heated oxygen sensor (bank 2) har-
ness clamp (2WD models)

17. Crankshaft position sensor (POS)

PBIC1175E

OIL PAN AND OIL STRAINER

EM-27

Revision; 2004 April

2003 Murano

Remove oil cooler and water pipes. Refer to

LU-10, "OIL COOLER"

Remove drive belts. Refer to

EM-11, "DRIVE BELTS"

Remove A/C compressor with piping connected, and temporarily secure it aside. Refer to

ATC-151,

"Components"

Remove exhaust front tube. Refer to

EX-3, "EXHAUST SYSTEM"

10. Remove the heated oxygen sensor 2 (bank 2) and remove the three way catalyst (manifold) (bank 2) from

the exhaust manifold. Refer to

EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"

11. Loosen lower oil pan bolts with power tool in reverse order of

illustration to remove.

12. Insert a seal cutter (special service tool) between the lower oil

pan and the upper oil pan.

CAUTION:

●

Be careful not to damage the mating surface.

●

Do not insert a screwdriver, this will damage the mating
surfaces.

13. Slide seal cutter (special service tool) by tapping on the side of

the tool with a hammer. Remove lower oil pan.

14. Remove oil strainer.

15. Remove the oil pressure switch. Refer to

LU-6, "Inspection"

16. Remove crankshaft position sensor (POS).

PBIC0782E

SEM365E

SEM960F

SEM575GA

EM-28

OIL PAN AND OIL STRAINER

Revision; 2004 April

2003 Murano

CAUTION:

●

Handle carefully to avoid dropping and shocks.

●

Do not disassemble.

●

Do not allow metal powder to adhere to magnetic part at sensor tip.

●

Do not place sensors in a location where they are exposed to magnetism.

17. Remove the four engine-to-transaxle bolts.

18. Remove upper oil pan.

●

Loosen bolts in reverse order as shown with power tool.

19. Insert an appropriate size tool into the notch of the upper oil pan

as shown (1).
Pry off the upper oil pan by moving the tool up and down as
shown (2).

20. Remove O-rings from the bottom of the cylinder block and oil

pump body.

SEM949G

PBIC1636E

SEM155F

PBIC1144E

OIL PAN AND OIL STRAINER

EM-29

Revision; 2004 April

2003 Murano

21. Remove oil pan gaskets.

AWD Model

WARNING:

Do not remove the oil pan until the exhaust system and cooling system have completely cooled off.

CAUTION:

When removing the upper oil pan from the engine, first remove the crankshaft position sensor (POS).
Be careful not to damage sensor edges or signal plate teeth.

Remove engine assembly from vehicle, and separate front suspension member, transaxle and transfer
assembly from engine. Refer to

EM-95, "Removal and Installation"

Install engine slingers. Refer to

EM-100, "CYLINDER BLOCK"

install engine sub-attachment to right side of cylinder block, then lift engine, and mount it onto the engine
stand. Refer to

EM-100, "CYLINDER BLOCK"

Drain engine oil. Refer to

LU-8, "Changing Engine Oil"

Remove oil filter. Refer to

LU-9, "OIL FILTER"

CAUTION:

Do not spill engine oil on the drive belt.

Remove oil cooler and water pipes. Refer to

LU-10, "OIL COOLER"

Remove the heated oxygen sensor 2 (bank 2) and remove the three way catalyst (manifold) (bank 2) from
the exhaust manifold. Refer to

EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"

Loosen lower oil pan bolts with power tool in reverse order of
illustration to remove.

Insert a seal cutter (special service tool) between the lower oil
pan and the upper oil pan.

CAUTION:

●

Be careful not to damage the mating surface.

●

Do not insert a screwdriver, this will damage the mating
surfaces.

PBIC1145E

PBIC0782E

SEM365E

EM-30

OIL PAN AND OIL STRAINER

Revision; 2004 April

2003 Murano

10. Slide seal cutter (special service tool) by tapping on the side of

the tool with a hammer. Remove lower oil pan.

11. Remove oil strainer.

12. Remove the oil pressure switch. Refer to

LU-6, "Inspection"

13. Remove upper oil pan.

●

Loosen bolts in reverse order as shown with power tool.

14. Insert an appropriate size tool into the notch of the upper oil pan

as shown (1).
Pry off the upper oil pan by moving the tool up and down as
shown (2).

SEM960F

SEM575GA

PBIC1636E

SEM155F

OIL PAN AND OIL STRAINER

EM-31

Revision; 2004 April

2003 Murano

15. Remove O-rings from the bottom of the cylinder block and oil

pump body.

16. Remove oil pan gasket.

INSPECTION AFTER REMOVAL

●

Clean oil strainer if any object attached.

INSTALLATION

Install in the upper oil pan in the order below.

Use a scraper to remove old liquid gasket from mating surfaces.

●

Also remove the old liquid gasket from mating surface of
the cylinder block.

●

Remove the old liquid gasket from the bolt holes and
threads.

CAUTION:

Do not scratch or damage the mating surfaces when clean-
ing off the old liquid gasket.

Apply Genuine RTV Silicone Sealant or equivalent, to the front
timing chain case gasket and the rear oil seal retainer gasket as
shown. Refer to

GI-46, "RECOMMENDED CHEMICAL PROD-

UCTS AND SEALANTS"

PBIC1144E

PBIC1145E

MEM108A

SEM964E

EM-32

OIL PAN AND OIL STRAINER

Revision; 2004 April

2003 Murano

●

To install, align protrusion of oil pan gasket with notches of
front timing chain case and rear oil seal retainer.

●

Install oil pan gasket with smaller arc to front timing chain
case side.

Install new O-rings on the cylinder block and oil pump side.

Apply a continuous bead of sealant to the cylinder block mating
surface of the upper oil pan to a limited portion as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

CAUTION:

●

For bolt holes with marks (5 locations), apply liquid
gasket outside the holes.

●

Apply a bead of 4.5 to 5.5 mm (0.177 to 0.217 in) diameter
to area “A”.

●

Attaching should be done within 5 minutes after coating.

Install the upper oil pan.

●

Tighten bolts in numerical order as shown.

●

There are two types of mounting bolts. Refer to the following
for locating bolts.

Install the four engine-to-transaxle bolts. (2WD models)

Install oil strainer to oil pump.

Install the lower oil pan in the order below.

PBIC1145E

PBIC1144E

100 mm (3.97 in)

: 5, 7, 8, 11

25 mm (0.98 in)

: Except the above

KBIA1078E

PBIC1636E

OIL PAN AND OIL STRAINER

EM-33

Revision; 2004 April

2003 Murano

Use a scraper to remove old liquid gasket from mating surfaces.

●

Also remove old liquid gasket from mating surface of
upper oil pan.

Apply a continuous bead of sealant to the lower oil pan.

●

Use Genuine RTV Silicone Sealant or equivalent. Refer to

●

Be sure the sealant is 4.5 - 5.5 mm (0.177 - 0.217 in) wide.

●

Attaching should be done within 5 minutes after coating.

Install lower oil pan.

●

Tighten the bolts in the numerical order as shown.

Install oil pan drain plug.

●

Refer to illustration of components of former page for installation direction of washer.

Install in the reverse order of removal after this step.

At least 30 minutes after oil pan is installed, pour engine oil.

SEM958F

PBIC1146E

PBIC0782E

EM-34

OIL PAN AND OIL STRAINER

Revision; 2004 April

2003 Murano

INSPECTION AFTER INSTALLATION

●

Before starting engine, check the levels of engine coolant, engine oil and working fluid. If less than
required quantity, fill to the specified level.

●

Use procedure below to check for fuel leakage.

–

Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.

–

Start engine. With engine speed increased, check again for fuel leakage at connection points.

●

Run engine to check for unusual noise and vibration.

●

Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil and working
fluid, fuel and exhaust gas.

●

Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.

●

After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to
specified level, if necessary.

IGNITION COIL

EM-35

Revision; 2004 April

2003 Murano

IGNITION COIL

PFP:22448

Removal and Installation

ABS0032I

REMOVAL

Remove the engine cover. Refer to

EM-16, "INTAKE MANIFOLD COLLECTOR"

Disconnect the mass air flow sensor electrical connector and remove the air cleaner and air duct assem-
bly. Refer to

EM-14, "Removal and Installation"

Remove the RH windshield wiper arm and the RH front cowl top cover. Refer to

EI-21, "COWL TOP"

Remove the intake manifold collector (upper and lower), gasket, and electric throttle control actuator.
Refer to

EM-16, "Removal and Installation"

The intake manifold collector (upper) should be moved aside with water hoses connected.

Remove ignition coil.

INSTALLATION

Installation is in the reverse order of removal.

Ignition coil

Spark plug

Rocker cover (left bank)

PBIC1176E

EM-36

SPARK PLUG (PLATINUM-TIPPED TYPE)

Revision; 2004 April

2003 Murano

SPARK PLUG (PLATINUM-TIPPED TYPE)

PFP:22401

Removal and Installation

ABS0033P

REMOVAL

Remove engine cover. Refer to

EM-16, "INTAKE MANIFOLD COLLECTOR"

Remove ignition coil. Refer to

EM-35, "IGNITION COIL"

Remove spark plug using spark plug wrench (commercial ser-
vice tool).

INSPECTION AFTER REMOVAL

●

Use 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:

●

Frequent engine starts

●

Low ambient temperatures

The cold type spark plug is suitable when spark plug knock occurs with the standard type spark plug under
conditions such as:

●

Extended highway driving

●

Frequent high engine revolution

CAUTION:

●

Do not drop or shock spark plug.

●

Do not use a wire brush for cleaning.

●

If plug tip is covered with carbon, spark plug cleaner may
be used.

SEM294A

Make

NGK

Standard type

PLFR5A-11

Hot type

PLFR4A-11

Cold type

PLFR6A-11

Gap (Nominal)

: 1.1 mm (0.043 in)

Cleaner air pressure:

Less than 588 kPa (6 kg/cm

, 85 psi)

Cleaning time:

Less than 20 seconds

SMA773C

SPARK PLUG (PLATINUM-TIPPED TYPE)

EM-37

Revision; 2004 April

2003 Murano

●

Checking and adjusting plug gap is not required between
change intervals.

INSTALLATION

●

Install in the reverse order of removal.

SMA806CA

EM-38

FUEL INJECTOR AND FUEL TUBE

Revision; 2004 April

2003 Murano

FUEL INJECTOR AND FUEL TUBE

PFP:16600

Removal and Installation

ABS0032K

CAUTION:

Do not remove or disassemble parts unless instructed as shown in the figure.

REMOVAL

WARNING:

To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.

Remove the engine cover. Refer to

EM-16, "INTAKE MANIFOLD COLLECTOR"

Release the fuel pressure. Refer to

EC-66, "FUEL PRESSURE RELEASE"

Remove the RH windshield wiper arm and the RH cowl top cover. Refer to

EI-21, "Removal and Installa-

tion"

Remove radiator cover grille, air duct (inlet), air cleaner case, air duct assembly and mass air flow sensor.
Refer to

EM-14, "AIR CLEANER AND AIR DUCT"

Disconnect electric throttle control actuator and engine coolant hoses.

CAUTION:

Handle carefully to avoid any shock to the electric throttle control actuator.

Disconnect vacuum hose, fuel injectors electrical connectors, and PCV hose.

CAUTION:

Cover any engine openings to avoid the entry of any foreign material.

Remove the vacuum tank from intake manifold collector (lower).

Disconnect the power steering hose bracket.

Fuel tube

Insulator

Clip

O-ring (black)

Fuel injector

O-ring (green)

Fuel damper

O-ring

Fuel feed hose (with damper)

10. Quick connector

11.

Quick connector cap

PBIC1177E

FUEL INJECTOR AND FUEL TUBE

EM-39

Revision; 2004 April

2003 Murano

Remove the intake manifold collector (upper and lower). Refer to

EM-16, "INTAKE MANIFOLD COLLEC-

TOR"

The intake manifold collector (upper) should be moved aside with water hoses connected.

10. Remove fuel feed hose (with damper) from fuel tube.

CAUTION:

●

While hoses are disconnected, plug them to prevent fuel from draining.

●

Do not separate fuel damper and fuel feed hose.

11. Disconnect fuel feed hose (with damper) quick connector at vehicle piping side. When separating fuel

feed hose and centralized under-floor piping connection, disconnect quick connector with the following
procedure.

Remove quick connector cap from quick connector.

Disconnect quick connector from centralized under-floor piping
as follows:

CAUTION:

Disconnect quick connector by using quick connector
release (special service tool: J-45488), not by picking out
retainer tabs.

With the sleeve side of quick connector release facing quick
connector, install quick connector release onto fuel tube.

ii.

Insert quick connector release into quick connector until sleeve
contacts and goes no further. Hold quick connector release on
that position.

CAUTION:

Inserting quick connector release hard will not disconnect
quick connector. Hold quick connector release where it
contacts and goes no further.

iii.

Draw and pull out quick connector straight from centralized
under-floor piping.

CAUTION:

●

Pull quick connector holding “A” position as shown in
the figure.

●

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.

●

Keep parts away from heat source. Especially, be careful when welding is performed around
them.

●

Do not expose parts to battery electrolyte or other acids.

●

Do not bend or twist connection between quick connector and fuel hose (with damper) during
installation/removal.

PBIC1178E

PBIC1179E

PBIC1898E

EM-40

FUEL INJECTOR AND FUEL TUBE

Revision; 2004 April

2003 Murano

●

To keep clean the connecting portion and to avoid dam-
age and foreign materials, cover them completely with
plastic bags or something similar.

12. Remove harness connector from fuel injector.

13. Loosen mounting bolts in numerical order in the figure, and

remove fuel tube and fuel injector assembly.

CAUTION:

Do not tilt it, or remaining fuel in pipes may flow out from
pipes.

14. Remove fuel injector from fuel tube with following procedure.
a.

Open and remove clip.

Remove fuel injector from the fuel tube by pulling straight.

CAUTION:

●

Be careful with remaining fuel that may go out from fuel
tube.

●

Be careful not to damage injector nozzles during
removal.

●

Do not bump or drop fuel injectors.

●

Do not disassemble fuel injectors.

15. Remove fuel damper from fuel tube.

INSTALLATION

Install fuel damper.

●

When handling O-rings, be careful of the following:

CAUTION:

●

Handle O-ring with bare hands. Never wear gloves.

●

Lubricate O-ring with new engine oil.

●

Do not clean O-ring with solvent.

●

Make sure that O-ring and its mating part are free of foreign material.

PBIC1899E

SEC030D

SBIA0364E

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