Nissan Murano Z50 (2003 year). Manual - part 58

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.

WARNING:

●

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

●

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

●

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.

Precautions for Liquid Gasket

ABS004RI

REMOVAL OF LIQUID GASKET SEALING

●

After removing the mounting bolts and nuts, separate the mating
surface using a seal cutter and remove the liquid gasket sealing.

CAUTION:

Be careful not to damage the mating surfaces.

●

In areas where the cutter is difficult to use, use a plastic hammer
to lightly tap the area where the liquid gasket is applied.

CAUTION:

If for some unavoidable reason a tool such as a flat-bladed
screwdriver is used, be careful not to damage the mating
surfaces.

LIQUID GASKET APPLICATION PROCEDURE

Using a scraper, remove the old liquid gasket adhering to the
gasket application surface and the mating surface.

●

Remove the liquid gasket completely from the groove of the
gasket application surface, mounting bolts, and bolt holes.

Wipe the gasket application surface and the mating surface with
white gasoline (lighting and heating use) to remove adhering
moisture, grease and foreign materials.

Attach the liquid gasket tube to the tube presser.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

PBIC0002E

PBIC0003E

PRECAUTIONS

CO-3

Revision; 2004 April

2003 Murano

Apply the liquid gasket without breaks to the specified location
with the specified dimensions.

●

If there is a groove for the liquid gasket application, apply the
gasket to the groove.

●

As for the bolt holes, normally apply the gasket inside the
holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of service manual.

●

Within five minutes of gasket application, install the mating
component.

●

If the liquid gasket protrudes, wipe it off immediately.

●

Do not retighten after the installation.

●

After 30 minutes or more have passed from the installation, fill
the engine oil and engine coolant.

CAUTION:

If there are specific instructions in this manual, observe
them.

EMA0622D

SEM159F

CO-4

PREPARATION

Revision; 2004 April

2003 Murano

PREPARATION

PFP:00002

Special Service Tools

ABS0035A

The actual shapes of Kent-Moore tools may from those of special service tools illustrated here.

Commercial Service Tools

ABS0035B

Tool number
(Kent-Moore No.)
Tool name

Description

WS39930000
( – )
Tube pressure

Pressing the tube of liquid gasket

EG17650301
(J33984-A)
Radiator cap tester adapter

Adapting radiator cap tester to radiator cap
and radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)

KV99103510
( – )
Radiator plate pliers A

Installing radiator upper and lower tanks

KV99103520
( – )
Radiator plate pliers B

Removing radiator upper and lower tanks

S-NT052

S-NT564

S-NT224

S-NT225

Tool name

Description

Power tool

Loosening bolts and nuts

PBIC0190E

OVERHEATING CAUSE ANALYSIS

CO-5

Revision; 2004 April

2003 Murano

OVERHEATING CAUSE ANALYSIS

PFP:00012

Troubleshooting Chart

ABS0035C

Symptom

Check items

Cooling sys-
tem parts
malfunction

Poor heat transfer

Water pump malfunction

Worn or loose drive belt

—

Thermostat stuck closed

—

Damaged fins

Dust contamination or
paper clogging

Physical damage

Clogged radiator cooling
tube

Excess foreign material
(rust, dirt, sand, etc.)

Reduced air flow

Cooling fan does not oper-
ate

Fan assembly

—

High resistance to fan rota-
tion

Damaged fan blades

Damaged radiator shroud

—

Improper engine coolant
mixture ratio

—

Poor engine coolant quality

—

Engine coolant viscosity

—

Insufficient engine coolant

Engine coolant leaks

Cooling hose

Loose clamp

Cracked hose

Water pump

Poor sealing

Radiator cap

Loose

Poor sealing

Radiator

O-ring for damage, deterio-
ration or improper fitting

Cracked radiator tank

Cracked radiator core

Reservoir tank

Cracked reservoir tank

Overflowing reservoir tank

Exhaust gas leaks into
cooling system

Cylinder head deterioration

Cylinder head gasket dete-
rioration

CO-6

OVERHEATING CAUSE ANALYSIS

Revision; 2004 April

2003 Murano

Except cool-
ing system
parts mal-
function

—

Overload on engine

Abusive driving

High engine rpm under no
load

Driving in low gear for
extended time

Driving at extremely high
speed

Powertrain system mal-
function

—

Installed improper size
wheels and tires

Dragging brakes

Improper ignition timing

Blocked or restricted air
flow

Blocked bumper

—

Blocked radiator grille

Installed car brassiere

Mud contamination or
paper clogging

Blocked radiator

—

Blocked condenser

Blocked air flow

Installed large fog lamp

Symptom

Check items

COOLING SYSTEM

CO-7

Revision; 2004 April

2003 Murano

COOLING SYSTEM

PFP:21020

Cooling Circuit

ABS0034X

PBIC1647E

PBIC1648E

CO-8

ENGINE COOLANT

Revision; 2004 April

2003 Murano

ENGINE COOLANT

PFP:KQ100

Inspection

ABS0035F

LEVEL CHECK

●

Check if the reservoir tank engine coolant level is within the MIN
to MAX range when the engine is cool.

●

Adjust the coolant level as necessary.

LEAK CHECK

●

To check for leaks, apply pressure to the cooling system with the
tester.

WARNING:

Never remove the radiator cap when the engine is hot. Serious
burns could occur from high pressure coolant escaping from
the radiator.

CAUTION:

Higher test pressure than specified may cause radiator dam-
age.

Changing Engine Coolant

ABS0035V

WARNING:

●

To avoid being scalded, never change the engine coolant when the engine is hot.

●

Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn
to release built-up pressure. Then turn the cap all the way.

DRAINING ENGINE COOLANT

Remove radiator drain hole cap on engine undercover.

Open radiator drain plug at the bottom of radiator and remove
the radiator filler cap.

●

Be careful not to allow engine coolant to contact the drive
belts.

SMA412B

Testing pressure : 157 kPa (1.6 kg/cm

, 23 psi)

SLC756A

PBIC1204E

ENGINE COOLANT

CO-9

Revision; 2004 April

2003 Murano

When draining all of the engine coolant for engine removal or
repair, open the drain plugs on the engine-right and left sides
and the engine-front side.

Remove the reservoir tank, drain the engine coolant and clean the tank before installing.

Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush the engine cooling system. Refer to

CO-11, "FLUSHING COOLING SYSTEM"

PBIC1205E

PBIC1285E

PBIC0846E

CO-10

ENGINE COOLANT

Revision; 2004 April

2003 Murano

REFILLING ENGINE COOLANT

Install reservoir tank if removed, and radiator drain plug.

Close and tighten cylinder block drain plugs securely if removed.

●

Apply sealant to the threads of the cylinder block drain plugs.

●

Use Genuine Thread Sealant or equivalent. Refer to

GI-46, "RECOMMENDED CHEMICAL PROD-

UCTS AND SEALANTS"

Fill radiator, and reservoir tank if removed, to specified level.

●

Pour engine coolant through coolant filler neck slowly of
less than 2 (2-1/8 US qt,1-3/4 lmp qt) a minute to allow
air in system to escape.

●

Use genuine Nissan anti-freeze coolant or equivalent
mixed with water (distilled or demineralized. Refer to

MA-

Warm up engine to normal operating temperature with radiator
cap installed.

Run engine at 3,000 rpm for 10 seconds and return to idle
speed.

●

Repeat two or three times.

Stop engine and cool down to less than approximately 50

(122

F).

●

Cool down using a fan to reduce the time.

●

If necessary, refill radiator up to filler neck with engine coolant.

Refill reservoir tank to MAX level line with engine coolant.

Repeat steps 4 through 7 two or more times with radiator cap installed until engine coolant level no longer
drops.

Check cooling system for leaks with engine running.

10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000 r

pm with heater temperature controller set at several position between COOL and WARM.

●

Sound may be noticeable at heater unit.

11. Repeat step 10 three times.

12. If sound is heard, bleed air from cooling system by repeating step 4 through 8 until engine coolant level no

longer drops.

●

Clean excess engine coolant from engine.

Radiator drain plug:

: 0.78 - 1.56 N·m (0.08 - 0.15 kg-m, 7 - 13 in-lb)

Cylinder block drain plug (LH):

: 59 - 65 N·m (6.1 - 6.6 kg-m, 44 - 47 ft-lb)

Cylinder block drain plug (RH):

: 24.5 - 29.4 N·m (2.5 - 2.9 kg-m, 18 - 21 ft-lb)

Cylinder block drain plug (Front side):

: 7.8 - 11.8 N·m (0.8 - 1.2 kg-m, 69 - 104 in-lb)

Engine coolant capacity
(with reservoir tank at MAX level)

: Approximately 9.2 (9-3/4 US qt, 8-1/8 lmp qt)

SMA182B

Reservoir tank capacity (at MAX level)

: 0.8 (7/8 US qt, 3/4 lmp qt)

SMA412B

ENGINE COOLANT

CO-11

Revision; 2004 April

2003 Murano

FLUSHING COOLING SYSTEM

Fill radiator with water until water spills from the air relief hole, then close air relief plug. Fill radiator and
reservoir tank with water and reinstall radiator cap.

Run engine and warm it up to normal operating temperature.

Rev engine two or three times under no-load.

Stop engine and wait until it cools down.

Drain the water from the system. Refer to

MA-15, "DRAINING ENGINE COOLANT"

Repeat steps 1 through 5 until clear water begins to drain from the radiator.

CO-12

RADIATOR

Revision; 2004 April

2003 Murano

RADIATOR

PFP:21400

Removal and Installation

ABS0035H

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator.

REMOVAL

Remove undercover.

Drain engine coolant. Refer to

MA-15, "Changing Engine Coolant"

CAUTION:

Perform when the engine is cold.

Remove air duct and radiator cover grills. Refer to

EM-14, "Removal and Installation"

Disconnect CVT fluid cooler hoses.

●

Install plug to avoid leakage of CVT fluid.

Remove reservoir tank and bracket.

Disconnect upper and lower radiator hoses.

Remove battery and battery tray, and move fuse box aside.

Remove radiator cooling fan assembly.

Bracket

Reservoir tank filler cap

Reservoir tank

Bracket

Clamp

Reservoir tank hose

Radiator upper clip

Mounting rubber

Radiator cap

10. Radiator

11.

Mounting rubber

12. Clamp

13. CVT fluid cooler hose

14. Clamp

15. Radiator hose (lower)

16. CVT fluid cooler hose

17. O-ring

18. Drain plug

19. Radiator hose (upper)

20. Radiator cooling fan assembly

PBIC1206E

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