Nissan Murano Z51 (2008 year). Manual - part 172

SPARK PLUG

EM-17

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6.

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

INSTALLATION

Install in the reverse order of removal.

Inspection

INFOID:0000000003304097

INSPECTION AFTER REMOVAL

Use the standard type spark plug for normal condition.

CAUTION:

• Never drop or shock spark plug.
• Never use a wire brush for cleaning.
• If plug tip is covered with carbon, spark plug cleaner may be

used.

• Spark plug gap adjustment is not required between replace-

ment intervals.

• Measure spark plug gap. When it exceeds the limit, replace

spark plug even if it is within the specified replacement mile-
age. Refer to 

EM-142, "Spark Plug"

.

a

: 14 mm (0.55 in)

JPBIA0030ZZ

Spark plug (Standard type)

: Refer to 

EM-142, "Spark Plug"

.

Cleaner air pressure:

Less than 588 kPa (6 kg/cm

2

, 85 

psi)

Cleaning time:

Less than 20 seconds

SMA773C

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Revision: 2008 October

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EM-18

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CAMSHAFT VALVE CLEARANCE

CAMSHAFT VALVE CLEARANCE

Inspection and Adjustment

INFOID:0000000003304098

INSPECTION

Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if
there is unusual engine conditions regarding valve clearance.
In cases of removing/installing or replacing camshaft and valve-
related parts, or of unusual engine conditions due to changes in
valve clearance (found malfunctions during stating, idling or causing
noise), perform inspection as follows:

1.

Remove rocker covers (bank 1 and bank 2). Refer to 

EM-50, "Exploded View"

.

2.

Measure the valve clearance as follows:

a.

Set No. 1 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley clockwise to align timing mark

(grooved line without color) (

) with timing indicator.

• Check that intake and exhaust cam nose on No. 1 cylinder

(engine front side of bank 1) are located as shown in the fig-
ure.

• If not, turn crankshaft one revolution (360 degrees) and align

as shown in the figure.

b.

Use a feeler gauge, measure the clearance between valve lifter
and camshaft.

: Engine front

JPBIA0164ZZ

SEM727G

: Engine front

JPBIA0044ZZ

Valve clearance

: Refer to 

EM-142, "Camshaft"

.

SEM139D

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CAMSHAFT VALVE CLEARANCE

EM-19

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• By referring to the figure, measure the valve clearances at

locations marked “

×

” as shown in the table below (locations

indicated in the figure).

• No. 1 cylinder at compression TDC

c.

Rotate crankshaft by 240 degrees clockwise (when viewed from engine front) to align No. 3 cylinder at
TDC its compression stroke.
NOTE:
Mark a position 240 degrees (b) from a corner of the hexagonal
part of crankshaft pulley mounting bolt as shown in the figure.
Use the hexagonal part as a guide. 

: Engine front

Measuring position [bank 1 (A)]

No. 1 CYL.

No. 3 CYL. 

No. 5 CYL.

No. 1 cylinder at com-

pression TDC

EXH (C)

×

 (B)

INT (D)

×

 (E)

Measuring position [bank 2 (H)]

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 1 cylinder at com-

pression TDC

INT (D)

×

 (F)

EXH (C)

×

 (G)

JPBIA0165ZZ

1

: Crankshaft pulley

A

: Paint mark

JPBIA0166ZZ

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EM-20

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CAMSHAFT VALVE CLEARANCE

• By referring to the figure, measure the valve clearances at

locations marked “

×

” as shown in the table below (locations

indicated in the figure).

• No. 3 cylinder at compression TDC

d.

Rotate crankshaft by 240 degrees clockwise (when viewed from engine front) to align No. 5 cylinder at
TDC of compression stroke.
NOTE:
Mark a position 240 degrees (b) from a corner of the hexagonal
part of crankshaft pulley mounting bolt as shown in the figure.
Use the hexagonal part as a guide. 

: Engine front

Measuring position [bank 1 (A)]

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 3 cylinder at com-

pression TDC

EXH (C)

×

 (B)

INT (D)

×

 (E)

Measuring position [bank 2 (H)]

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 3 cylinder at com-

pression TDC

INT (D)

×

 (F)

EXH (C)

×

 (G)

JPBIA0167ZZ

1

: Crankshaft pulley

A

: Paint mark

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CAMSHAFT VALVE CLEARANCE

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• By referring to the figure, measure the valve clearances at

locations marked “

×

” as shown in the table below (locations

indicated in the figure).

• No. 5 cylinder at compression TDC

3.

Perform adjustment if the measured value is out of the standard. Refer to “ADJUSTMENT”.

ADJUSTMENT

• Perform adjustment depending on selected head thickness of valve lifter.
1.

Measure the valve clearance. Refer to “INSPECTION”.

2.

Remove camshaft. Refer to 

EM-94, "Exploded View"

.

3.

Remove valve lifters at the locations that are out of the standard.

4.

Measure the center thickness of the removed valve lifters with a
micrometer (A).

5.

Use the equation below to calculate valve lifter thickness for replacement.

: Engine front

Measuring position [bank 1 (A)]

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 5 cylinder at 

compression TDC

EXH (C)

×

 (B)

INT (D)

×

 (E)

Measuring position [bank 2 (H)]

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 5 cylinder at 

compression TDC

INT (D)

×

 (F)

EXH (C)

×

 (G)

JPBIA0168ZZ

JPBIA0169ZZ

Valve lifter thickness calculation:

t = t

1

 + (C

1 

– C

2

)

t

= Valve lifter thickness to be replaced

t

1

= Removed valve lifter thickness

C

1

= Measured valve clearance

C

2

= Standard valve clearance:

Intake

: 0.30 mm (0.012 in) 

Exhaust

: 0.33 mm (0.013 in) 

Revision: 2008 October

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EM-22

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CAMSHAFT VALVE CLEARANCE

• Thickness of new valve lifter can be identified by stamp marks

on the reverse side (inside the cylinder).
Stamp mark 788P indicates 7.88 mm (0.3102 in) in thickness.

Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of
0.02 mm (0.0008 in) (when manufactured at factory). Refer to 

EM-142, "Camshaft"

.

6.

Install selected valve lifter.

7.

Install camshaft. Refer to 

EM-94, "Exploded View"

.

8.

Manually turn crankshaft pulley a few turns. 

9.

Check that the valve clearances for cold engine are within the specifications by referring to the specified
values. Refer to 

EM-18, "Inspection and Adjustment"

.

10. Install all removal parts in the reverse order of removal. 

11. Warm up the engine, and check for unusual noise and vibration.

A

:  Stamp

B

: Thickness of valve lifter

JPBIA0170ZZ

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COMPRESSION PRESSURE

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COMPRESSION PRESSURE

Inspection

INFOID:0000000003304099

1.

Warm up engine thoroughly. Then, stop it.

2.

Release fuel pressure. Refer to 

EC-545, "Inspection"

.

3.

Disconnect fuel pump fuse to avoid fuel injection during measurement. Refer to 

EC-21,

"Component Parts Location"

.

4.

Remove engine cover. Refer to 

EM-25, "Exploded View"

.

5.

Remove ignition coil and spark plug from each cylinder. Refer to 

EM-50, "Exploded View"

.

6.

Connect engine tachometer (not required in use of CONSULT-III).

7.

Install compression gauge with an adapter (commercial service
tool) onto spark plug hole.

• Use the adapter whose picking up end inserted to spark plug

hole is smaller than 20 mm (0.79 in) in diameter. Otherwise, it
may be caught by cylinder head during removal.

8.

With accelerator pedal fully depressed, turn ignition switch to “START” for cranking. When the gauge
pointer stabilizes, read the compression pressure and the engine rpm. Perform these steps to check each
cylinder.

CAUTION:

Always use a fully charged battery to obtain the specified engine speed.
• If the engine speed is out of the specified range, check battery liquid for proper gravity. Check the

engine speed again with normal battery gravity. 

• If compression pressure is below minimum value, check valve clearances and parts associated with

combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.

• If some cylinder has low compression pressure, pour small amount of engine oil into the spark plug hole

of the cylinder to recheck it for compression.

- If the added engine oil improves the compression, piston rings may be worn out or damaged. Check pis-

ton rings and replace if necessary.

- If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-

functioning. Check valves for damage. Replace valve or valve seat accordingly.

• If two adjacent cylinders have respectively low compression pressure and their compression remains

low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.

9.

After inspection is completed, install removed parts.

PBIC0900E

a

: 20 mm (0.79 in)

JPBIA0171ZZ

Compression pressure

: Refer to 

EM-141, "General Specification"

.

Revision: 2008 October

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EM-24

< ON-VEHICLE MAINTENANCE >

COMPRESSION PRESSURE

10. Start the engine, and check that the engine runs smoothly.

11. Perform trouble diagnosis. If DTC appears, erase it. Refer to 

EC-127, "Description"

.

Revision: 2008 October

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ENGINE COVER

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ON-VEHICLE REPAIR

ENGINE COVER

Exploded View

INFOID:0000000003304131

Removal and Installation

INFOID:0000000003304132

REMOVAL

1.

Remove radiator core support covers (RH and LH) and air duct (inlet). Refer to 

EM-27, "Exploded View"

.

2.

Remove engine cover mounting bolts (A) and (B).

3.

Draw and pull out engine cover from engine cover mounting bolts (C) and (D).

CAUTION:

Pull engine cover from mounting bolt (D) holding with hand the position (E) as shown in the figure.

4.

Remove engine cover mounting bolts (C) and (D) if necessary.

INSTALLATION

Install in the reverse order of removal.

1.

Engine cover

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1712GB

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EM-26

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DRIVE BELT AUTO TENSIONER AND IDLER PULLEY

DRIVE BELT AUTO TENSIONER AND IDLER PULLEY

Exploded View

INFOID:0000000003304100

Removal and Installation

INFOID:0000000003304101

Removal

1.

Remove drive belt. Refer to 

EM-13, "Removal and Installation"

.

• Keep auto-tensioner pulley arm locked after drive belt is removed.

2.

Remove auto-tensioner and idler pulley.
• Keep auto-tensioner pulley arm locked to install or remove auto-tensioner.

Installation

Install in the reverse order of removal.

CAUTION:

If there is damage greater than peeled paint, replace drive belt auto-tensioner.

1.

Drive belt auto-tensioner

2.

Idler pulley

3.

Idler pulley

4.

Bracket

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1626GB

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AIR CLEANER AND AIR DUCT

EM-27

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AIR CLEANER AND AIR DUCT

Exploded View

INFOID:0000000003304102

Removal and Installation

INFOID:0000000003304133

REMOVAL

NOTE:
Mass air flow sensor is removable under the car-mounted condition.
1.

Remove radiator core support covers (RH and LH).

2.

Remove air duct (inlet).

3.

Disconnect harness connector from mass air flow sensor.

4.

Disconnect PCV hose.

5.

Remove air cleaner cases (upper and lower) with mass air flow sensor and air duct assembly disconnect-
ing their joints.
• Add mating marks if necessary for easier installation.

1.

Mass air flow sensor

2.

Air cleaner case (upper)

3.

Holder

4.

Air cleaner filter

5.

Clamp

6.

Air duct assembly

7.

Clamp

8.

PCV hose

9.

Air duct (inlet)

10. Grommet

11.

Collar

12. Radiator core support cover (RH)

13. Radiator core support cover (LH)

14. Grommet

15. Grommet

16. Bracket

17. Bracket

18. Collar

19. Grommet

20. Air cleaner case (lower)

A.

To electric throttle control actuator

B.

To rocker cover (bank 2)

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1670GB

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EM-28

< ON-VEHICLE REPAIR >

AIR CLEANER AND AIR DUCT

6.

Remove mass air flow sensor from air cleaner case (upper), if necessary.

CAUTION:

Handle the mass air flow sensor with following cares.
• Never shock the mass air flow sensor.
• Never disassemble the mass air flow sensor.
• Never touch the sensor of the mass air flow sensor.

INSTALLATION

Note the following, and install in the reverse order of removal.
• Align marks. Attach each joint. Screw clamps firmly.

Inspection

INFOID:0000000003304104

INSPECTION AFTER REMOVAL

Inspect air duct assembly for crack or tear.
• If anything found, replace air duct assembly.

Revision: 2008 October

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INTAKE MANIFOLD COLLECTOR

EM-29

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INTAKE MANIFOLD COLLECTOR

Exploded View

INFOID:0000000003304105

Removal and Installation

INFOID:0000000003304134

REMOVAL

WARNING:

1.

Vacuum hose

2.

Clamp

3.

Clamp

4.

PCV hose

5.

Intake manifold collector

6.

Gasket

7.

Vacuum hose

8.

Bracket

9.

Electronic controlled engine mount 
control solenoid valve

10. Vacuum hose

11.

Vacuum hose

12. Vacuum hose

13. Vacuum gallery

14. Vacuum hose

15. Vacuum hose

16. VIAS control solenoid valve 2

17. VIAS control solenoid valve 1

18.

EVAP canister purge control solenoid 
valve

19. Clamp

20. EVAP hose

21. Service port

22. Bracket

23. EVAP hose

24. EVAP hose

25. EVAP pipe

26. EVAP hose

27. Clamp

28. Water hose

29. Water hose

30. Bracket

31. Electric throttle control actuator

32. Gasket

A.

To brake booster

B.

To rocker cover (bank 1)

C.

To vacuum tube

D.

To vacuum pipe

E.

To heater pipe

F.

To water outlet

: Engine front

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1713GB

Revision: 2008 October

2009 Murano

EM-30

< ON-VEHICLE REPAIR >

INTAKE MANIFOLD COLLECTOR

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

1.

Remove engine cover. Refer to 

EM-25, "Exploded View"

.

CAUTION:

Be careful not to damage or scratch engine cover.

2.

Remove air cleaner cases (upper and lower) with mass air flow sensor and air duct assembly. Refer to

EM-27, "Exploded View"

.

3.

Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to 

CO-8, "Draining"

.

CAUTION:

Perform this step when the engine is cold.

4.

Remove front wiper arm and extension cowl top. Refer to 

WW-126, "Exploded View"

 and 

EXT-20,

"Exploded View"

.

5.

Disconnect water hoses from electric throttle control actuator.
• When engine coolant is not drained from radiator, attach plug to water hoses to prevent engine coolant

leakage.

6.

Remove electric throttle control actuator as follows:

a.

Disconnect harness connector.

b.

Loosen mounting bolts in the reverse order as shown in the fig-
ure.

CAUTION:

• Handle carefully to avoid any shock to electric throttle

control actuator.

• Never disassemble.

7.

Remove the following parts:
• Vacuum hose
• PCV hose
• High pressure piping from intake manifold: Refer to 

ST-42, "Exploded View"

.

• Electronic controlled engine mount control solenoid valve

8.

Disconnect EVAP hoses and harness connector from EVAP canister purge volume control solenoid valve.

9.

Remove EVAP canister purge volume control solenoid valve and bracket assembly.

10. Remove VIAS control solenoid valve mounting bolts and vacuum gallery mounting bolts, and then move

vacuum gallery.
• Add mating marks if necessary for easier installation. 

11. Loosen mounting nuts and bolts in the reverse order as shown

in the figure, and remove intake manifold collector and gasket.

CAUTION:

Cover engine openings to avoid entry of foreign materials.

INSTALLATION

Note the following, and install in the reverse order of removal.

Intake Manifold Collector

JPBIA1631ZZ

: Engine front

JPBIA1628ZZ

Revision: 2008 October

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INTAKE MANIFOLD COLLECTOR

EM-31

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Tighten mounting nuts and bolts in numerical order as shown in the
figure.

Electric Throttle Control Actuator

• Tighten mounting bolts in numerical order as shown in the figure.
• Perform the “Throttle Valve Closed Position Learning” when har-

ness connector of electric throttle control actuator is disconnected.
Refer to 

EC-17, "THROTTLE VALVE CLOSED POSITION

LEARNING : Description"

.

• Perform the “Idle Air Volume Learning” and “Throttle Valve Closed

Position Learning” when electric throttle control actuator is
replaced. Refer to 

EC-17, "IDLE AIR VOLUME LEARNING :

Description"

.

: Engine front

JPBIA1628ZZ

JPBIA1631ZZ

Revision: 2008 October

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EM-32

< ON-VEHICLE REPAIR >

INTAKE MANIFOLD

INTAKE MANIFOLD

Exploded View

INFOID:0000000003304107

Removal and Installation

INFOID:0000000003304135

REMOVAL

1.

Release fuel pressure. Refer to 

EC-545, "Inspection"

.

2.

Remove intake manifold collector. Refer to 

EM-29, "Exploded View"

.

3.

Remove fuel tube and fuel injector assembly. Refer to 

EM-45, "Exploded View"

.

4.

Loosen mounting nuts and bolts in the reverse order as shown
in the figure to remove intake manifold with power tool.

5.

Remove gaskets.

CAUTION:

Cover engine openings to avoid entry of foreign materials.

INSTALLATION

Note the following, and install in the reverse order or removal.

Intake Manifold

• If stud bolts were removed, install them and tighten to the specified torque below.

1.

Intake manifold

2.

Gasket

A.

Refer to 

EM-32

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1629GB

: Engine front

JPBIA1630ZZ

: 10.8 N·m (1.1 kg-m, 8 ft-lb)

Revision: 2008 October

2009 Murano