Nissan Murano Z51 (2008 year). Manual - part 85

CHG

ALTERNATOR

CHG-25

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Removal and Installation

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REMOVAL

1.

Disconnect the negative battery terminal.

2.

Remove engine cover.

3.

Remove front wheel and tire (RH).

4.

Remove splash guard (RH) Refer to 

EXT-23, "FENDER PROTECTOR : Exploded View"

.

5.

Remove air cleaner and air duct assembly. Refer to 

CO-8, "Draining"

.

6.

Remove drive belt. Refer to 

EM-13, "Removal and Installation"

.

7.

Remove A/C compressor. Refer to 

HA-37, "Removal and Installation"

.

8.

Remove idler pulley. 

9.

Disconnect the oil pressure switch.

10. Disconnect the alternator harness connectors.

11. Remove the alternator bolt and nuts, using power tools.

12. Slide the alternator out and remove.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

1.

Rear bearing

2.

Rotor assembly

3.

Retainer

4.

Front bearing

5.

Front bracket assembly

6.

Through bolt

7.

Pulley

8.

Pulley nut

9.

Stator assembly

10. IC voltage regulator assembly

11.

Diode assembly

12. Rear bracket assembly

13. Terminal set

Refer to 

GI-4, "Components"

 for symbols in the figure.

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ALTERNATOR

• Temporarily tighten all of alternator bolt and nuts. And then

tighten them in numerical order shown in the figure.

• Be sure to tighten “B” terminal nut carefully.
• Install alternator and check tension of belt. Refer to 

EM-26, "Exploded View"

.

• For this model, the power generation voltage variable control system that controls the power gener-

ation voltage of the alternator has been adopted. Therefore, the power generation voltage variable
control system operation inspection should be performed after replacing the alternator, and then
make sure that the system operates normally. Refer to 

CHG-22, "Inspection Procedure"

.

Inspection

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ALTERNATOR PULLEY INSPECTION

Perform the following.
• Make sure that alternator pulley does not rattle.
• Make sure that alternator pulley nut is tight.

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CHG

SERVICE DATA AND SPECIFICATIONS (SDS)

CHG-27

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Alternator

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*: Adjustment range of power generation voltage variable control is 11.4 – 15.6 V.

Type

A003TJ1791

MITSUBISHI make

Nominal rating

[V - A]

12 – 130

Ground polarity

Negative

Minimum revolution under no-load (When 13.5 V is ap-
plied)

[rpm]

Less than 1,300

Hot output current (When 13.5 V is applied)

[A/rpm]

More than 61/1,500

More than 109/2,500
More than 129/5,000

Regulated output voltage

[V]

14.1 – 14.7

*

Minimum length of brush

[mm (in)]

More than 5.00 (0.197)

Brush spring pressure

[N (g, oz)]

4.1 – 5.3 (418 – 541, 14.7 – 19.1)

Slip ring minimum outer diameter

[mm (in)]

More than 22.1 (0.870)

Rotor (Field coil) resistance

[

Ω

]

1.8  –  2.2

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ENGINE

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SECTION 

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CONTENTS

ENGINE COOLING SYSTEM

FUNCTION DIAGNOSIS ...............................

2

DESCRIPTION ....................................................

2

Engine Cooling System ...........................................

2

Engine Cooling System Schematic .........................

2

SYMPTOM DIAGNOSIS  ...............................

3

OVERHEATING CAUSE ANALYSIS  ..................

3

Troubleshooting Chart ..............................................

3

PRECAUTION ...............................................

5

PRECAUTIONS ...................................................

5

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................

5

Liquid Gasket ...........................................................

5

PREPARATION ............................................

7

PREPARATION ...................................................

7

Special Service Tool  .................................................

7

Commercial Service Tools .......................................

7

ON-VEHICLE MAINTENANCE .....................

8

ENGINE COOLANT  ............................................

8

Inspection ..................................................................

8

Draining .....................................................................

8

Refilling .....................................................................

9

Flushing ...................................................................

10

RADIATOR .........................................................

12

RADIATOR CAP ........................................................

12

RADIATOR CAP : Inspection ..................................

12

RADIATOR ................................................................

12

RADIATOR : Inspection  ..........................................

12

ON-VEHICLE REPAIR .................................

13

RADIATOR ........................................................

13

Exploded View .........................................................

13

Removal and Installation  .........................................

13

Inspection ................................................................

15

COOLING FAN ..................................................

16

Exploded View .........................................................

16

Removal and Installation  .........................................

16

Disassembly and Assembly .....................................

17

Inspection ................................................................

17

WATER PUMP  ..................................................

18

Exploded View .........................................................

18

Removal and Installation  .........................................

18

Inspection ................................................................

21

WATER INLET AND THERMOSTAT ASSEM-
BLY ....................................................................

23

Exploded View .........................................................

23

Removal and Installation  .........................................

23

Inspection ................................................................

24

WATER OUTLET AND WATER PIPING  ..........

25

Exploded View .........................................................

25

Removal and Installation  .........................................

25

Inspection ................................................................

26

SERVICE DATA AND SPECIFICATIONS 
(SDS) ............................................................

27

SERVICE DATA AND SPECIFICATIONS 
(SDS) .................................................................

27

Periodical Maintenance Specification ......................

27

Radiator ...................................................................

27

Thermostat ..............................................................

27

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DESCRIPTION

FUNCTION DIAGNOSIS

DESCRIPTION

Engine Cooling System

INFOID:0000000003304273

Engine Cooling System Schematic

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OVERHEATING CAUSE ANALYSIS

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SYMPTOM DIAGNOSIS

OVERHEATING CAUSE ANALYSIS

Troubleshooting Chart

INFOID:0000000003304275

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 pa-
per 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 density

—

Insufficient engine coolant

Engine coolant leakage

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 leakage into 
cooling system

Cylinder head deterioration

Cylinder head gasket deteri-
oration

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OVERHEATING CAUSE ANALYSIS

Except cool-
ing system 
parts mal-
function

—

Overload on engine

Abusive driving

High engine rpm under no 
load

Driving in low gear for ex-
tended time

Driving at extremely high 
speed

Powertrain system malfunc-
tion

—

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

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PRECAUTIONS

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000004754455

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 AIRBAG” and “SEAT BELT” of this
Service Manual.

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 performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.

• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-

vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors while ignition switch is
ON or engine is running, never use air or electric power tools or strike near the sensor(s) with a hammer.
Heavy vibration may activate the sensor(s), deploy the airbag(s), possibly cause serious injury.
When using air or electric power tools or hammers, always turn OFF ignition switch, disconnect the battery,
and wait 3 minutes or more before performing any service.

Liquid Gasket

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REMOVAL OF LIQUID GASKET SEALING

• After removing mounting nuts and bolts, separate the mating sur-

face using the seal cutter [SST: KV10111100 (J-37228)] (A) and
remove old liquid gasket sealing.     

CAUTION:

Be careful not to damage the mating surfaces.

• Tap (B) the seal cutter [SST: KV10111100 (J-37228)] to insert it,

and then slide (C) it by tapping on the side as shown in the figure.

• In areas where seal cutter [SST: KV10111100 (J-37228)] is difficult

to use, use a plastic hammer to lightly tap the parts, to remove it.

CAUTION:

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

LIQUID GASKET APPLICATION PROCEDURE

1.

Using a scraper (A), remove old liquid gasket adhering to the liq-
uid gasket application surface and the mating surface.
• Remove liquid gasket completely from the groove of the liquid

gasket application surface, mounting bolts, and bolt holes.

2.

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

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PRECAUTIONS

3.

Attach liquid gasket tube to the tube presser (commercial ser-
vice tool).
Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-17, "Recommended Chemical Products and Sealants"

.

4.

Apply liquid gasket without breaks to the specified location with
the specified dimensions.
• If there is a groove for the liquid gasket application, apply liq-

uid gasket to the groove.

• As for the bolt holes (B), normally apply liquid gasket inside

the holes. Occasionally, it should be applied outside the holes.
Check to read the text of service manual.

• Within five minutes of liquid gasket application, install the mat-

ing component.

• If liquid gasket protrudes, wipe it off immediately.
• Never retighten after mounting bolts and nuts the installation.
• After 30 minutes or more have passed from the installation, fill

engine oil and engine coolant.

CAUTION:

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

EMA0622D

A

:  Groove

: Inside

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PREPARATION

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PREPARATION

PREPARATION

Special Service Tool

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

Commercial Service Tools

INFOID:0000000003304278

Tool number
(Kent-Moore No.)
Tool name

Description

KV10111100
(J-37228)
Seal cutter

Removing water pump cover

NT046

Tool name

Description

Tube presser

Pressing the tube of liquid gasket

Power tool

Loosening nuts and bolts

Radiator cap tester

Checking radiator and radiator cap

Radiator cap tester adapter

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

S-NT052

PBIC0190E

PBIC1982E

S-NT564

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CO-8

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ENGINE COOLANT

ON-VEHICLE MAINTENANCE

ENGINE COOLANT

Inspection

INFOID:0000000003304279

LEVEL 

• Check if the reservoir tank engine coolant level is within the “MIN”

to “MAX” when the engine is cool.

• Adjust the engine coolant level if necessary.

LEAKAGE

• To check for leakage, apply pressure to the cooling system with the

radiator cap tester (commercial service tool) (A) and radiator cap
tester adapter (commercial service tool) (B).

WARNING:

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

CAUTION:

Higher test pressure than specified may cause radiator dam-
age.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.

• If anything is found, repair or replace damaged parts.

Draining

INFOID:0000000003304280

WARNING:

• To avoid being scalded, never change engine coolant when the engine is hot.
• Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn radiator cap a

quarter of a turn to release built-up pressure. Then turn radiator cap all the way.

1.

Remove engine under cover.

2.

Open radiator drain plug (1) at the bottom of radiator, and then
remove radiator cap. 

When draining all of engine coolant in the system, open water drain plugs on cylinder block. Refer
to 

EM-86, "Setting"

.

3.

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

A

:  MAX

B

:  MIN

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Testing pressure

: Refer to 

CO-27, "Radiator"

.

PBIC5121J

: Vehicle front

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ENGINE COOLANT

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4.

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

CO-10, "Flushing"

.

Refilling

INFOID:0000000003304281

1.

Install reservoir tank if removed and radiator drain plug.

CAUTION:

Be sure to clean drain plug and install with new O-ring.

If water drain plugs on cylinder block are removed, close and tighten them. Refer to 

EM-118, "Dis-

assembly and Assembly"

.

2.

Check that each hose clamp has been firmly tightened.

3.

Remove air duct assembly and air cleaner cases (upper and lower) assembly. Refer to 

EM-27, "Exploded

View"

.

4.

Disconnect heater hose (1) at the position (

) in the figure.

5.

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

CAUTION:

Never adhere the engine coolant to electronic equipments.
(alternator etc.)
• Pour engine coolant through engine 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.

• When engine coolant overflows disconnected heater

hose, connect heater hose, and continue filling the engine
coolant.

• Use Genuine NISSAN Long Life Antifreeze/Coolant or

equivalent mixed with water (distilled or demineralized).
Refer to 

MA-15, "FOR NORTH AMERICA : Fluids and Lubri-

cants"

 (for North America) or 

MA-16, "FOR MEXICO : Fluids

and Lubricants"

 (for Mexico).

Tightening torque

: Refer to 

CO-13, "Exploded View"

.

: Vehicle front

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Engine coolant capacity

: Refer to 

CO-27, "Periodical Maintenance Spec-

ification"

.

(With reservoir tank at “MAX” level)

Reservoir tank engine coolant capacity

: Refer to 

CO-27, "Periodical Maintenance 

Specification"

.

(At “MAX” level)

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CO-10

< ON-VEHICLE MAINTENANCE >

ENGINE COOLANT

6.

Install air duct assembly and air cleaner cases (upper and lower) assembly. Refer to 

EM-27, "Exploded

View"

.

7.

Install radiator cap.

8.

Warm up engine until opening thermostat. Standard for warming-up time is approximately 10 minutes at
3,000 rpm.
• Check thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.

CAUTION:

Watch water temperature gauge so as not to overheat engine.

9.

Stop the engine and cool down to less than approximately 50

°

C (122

°

F).

• Cool down using fan to reduce the time.
• If necessary, refill radiator up to filler neck with engine coolant.

CAUTION:

Never adhere the engine coolant to electronic equipments. (alternator etc.)

10. Refill reservoir tank to “MAX” level line with engine coolant.

11. Repeat steps 7 through 10 two or more times with radiator cap installed until engine coolant level no

longer drops. 

12. Check cooling system for leakage with engine running.
13. Warm up the engine, and check for sound of engine coolant flow while running engine from idle up to

3,000 rpm with heater temperature controller set at several position between “COOL” and “WARM”.
• Sound may be noticeable at heater unit.

14. Repeat step 13 three times.

15. If sound is heard, bleed air from cooling system by repeating step 5, and steps from 7 to 14 until engine

coolant level no longer drops. 

Flushing

INFOID:0000000003304282

1.

Install reservoir tank if removed and radiator drain plug.

CAUTION:

Be sure to clean drain plug and install with new O-ring.

If water drain plugs on cylinder block are removed, close and tighten them. Refer to 

EM-118, "Dis-

assembly and Assembly"

.

2.

Remove air duct assembly and air cleaner cases (upper and lower) assembly. Refer to 

EM-27, "Exploded

View"

.

A

: MAX 

B

:  MIN

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Tightening torque

: Refer to 

CO-13, "Exploded View"

.

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ENGINE COOLANT

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3.

Disconnect heater hose (1) at the position (

) in the figure.

4.

 Fill radiator and reservoir tank with water and reinstall radiator cap.

CAUTION:

Never adhere the water to electronic equipments. (alternator etc.)
• When water overflows disconnected heater hose, connect heater hose, and continue filling the

water.

5.

Run the engine and warm it up to normal operating temperature.

6.

Rev the engine two or three times under no-load.

7.

Stop the engine and wait until it cools down.

8.

Drain water from the system. Refer to 

CO-8, "Draining"

.

9.

Repeat steps 1 through 8 until clear water begins to drain from radiator.

: Vehicle front

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CO-12

< ON-VEHICLE MAINTENANCE >

RADIATOR

RADIATOR

RADIATOR CAP

RADIATOR CAP : Inspection

INFOID:0000000003304283

• Check valve seat (A) of radiator cap. 
- Check if valve seat is swollen to the extent that the edge of the

plunger (B) cannot be seen when watching it vertically from the
top.

- Check if valve seat has no soil and damage.
- Check that there is no dirt or damage on the valve seat of radiator

cap negative-pressure valve. 

- Check that there are no unusualness in the opening and closing

conditions of negative-pressure valve.

• Check radiator cap relief pressure.

- When connecting radiator cap to the radiator cap tester (commer-

cial service tool) and the radiator cap tester adapter (commercial
service tool) (A), apply engine coolant to the cap seal surface. 

• Replace radiator cap if there is an unusualness related to the above three.

CAUTION:

When installing radiator cap, thoroughly wipe out the radiator pipe (upper) filler neck to remove any
waxy residue or foreign material.

RADIATOR

RADIATOR : Inspection

INFOID:0000000003304284

Check radiator for mud or clogging. If necessary, clean radiator as follows:

CAUTION:

• Be careful not to bend or damage radiator fins.
• When radiator is cleaned without removal, remove all surrounding parts such as radiator cooling fan

assembly and horns. Then tape harness and connectors to prevent water from entering.

1.

Apply water by hose to the back side of the radiator core vertically downward.

2.

Apply water again to all radiator core surfaces once per minute.

3.

Stop washing if any stains no longer flow out from radiator.

4.

Blow air into the back side of radiator core vertically downward.
• Use compressed air lower than 490 kPa (5 kg/cm

2

, 71 psi) and keep distance more than 30 cm (11.81

in). 

5.

Blow air again into all the radiator core surfaces once per minute until no water sprays out.

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Standard and limit

: Refer to 

CO-27, "Radiator"

.

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RADIATOR

CO-13

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P

O

ON-VEHICLE REPAIR

RADIATOR

Exploded View

INFOID:0000000003304285

Removal and Installation

INFOID:0000000003304286

REMOVAL

1.

Reservoir tank cap

2.

Reservoir tank

3.

Clamp

4.

Reservoir tank hose

5.

Radiator cap

6.

Radiator cap adapter

7.

Radiator pipe (upper)

8.

Clamp

9.

Radiator hose (upper)

10. Radiator hose (upper)

11.

O-ring

12. Drain plug

13. Water drain hose

14. Mounting rubber (upper)

15. Radiator upper clip

16. Radiator

17. Mounting rubber (lower)

18. Radiator pipe (lower)

19. Radiator hose (lower)

20. Clamp

21. CVT fluid cooler hose

22. CVT fluid cooler hose

23. CVT fluid cooler pipe

24. CVT fluid cooler hose

25. Grommet

26. Cooling fan assembly

27. Radiator hose (lower)

A.

To water outlet

B.

To transaxle assembly

C.

To water inlet

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA2760GB

Revision: 2008 October

2009 Murano