Content .. 125 126 127 128 ..

Nissan Murano Z50 (2006 year). Manual - part 127

CYLINDER HEAD

EM-101

Revision: 2006 August

2006 Murano

Disassembly and Assembly

NBS0029U

DISASSEMBLY

Remove spark plug with spark plug wrench (commercial service tool).

Remove valve lifter.

●

Identify installation positions, and store them without mixing them up.

Remove valve collet.

●

Compress valve spring with the valve spring compressor, the
attachment and the adapter (SST). Remove valve collet with
a magnet hand.

CAUTION:

When working, take care not to damage valve lifter holes.

Remove valve spring retainer, valve spring and valve spring seat.

Push valve stem to combustion chamber side, and remove valve.

●

Identify installation positions, and store them without mixing them up.

Valve lifter

Valve collet

Valve spring retainer

Valve spring

Valve oil seal

Valve spring seat

Valve guide

Spark plug

Spark plug tube

10. Cylinder head (right bank)

11.

Valve seat

12. Valve (EXH)

13. Valve (INT)

14. Cylinder head (left bank)

PBIC2637E

PBIC1803E

EM-102

CYLINDER HEAD

Revision: 2006 August

2006 Murano

Remove valve oil seal with the valve oil seal puller (SST).

If valve seat must be replaced, refer to

EM-105, "VALVE SEAT REPLACEMENT"

If valve guide must be replaced, refer to

EM-104, "VALVE GUIDE REPLACEMENT"

Remove spark plug tube, as necessary.

●

Using a pliers, pull spark plug tube out of cylinder head.

CAUTION:

●

Take care not to damage cylinder head.

●

Once removed, spark plug tube will be deformed and cannot be reused. Do not remove it unless
absolutely necessary.

ASSEMBLY

When valve guide is removed, install it. Refer to

EM-104, "VALVE GUIDE REPLACEMENT"

When valve seat is removed, install it. Refer to

EM-105, "VALVE SEAT REPLACEMENT"

Install new valve oil seals as follows:

Apply new engine oil on valve oil seal joint and seal lip.

Install with the valve oil seal drift (SST) to match dimension in
the figure.

Install valve spring seat.

Install valve.

●

Install it in the original position.

NOTE:
Larger diameter valves are for intake side.

Install valve spring (uneven pitch type).

●

Install narrow pitch end (paint mark) to cylinder head side
(valve spring seat side).

●

Intake side and exhaust side valve springs are different.
Install them referring to the following paint mark color.

Install valve spring retainer.

PBIC0884E

Height “H” (Without valve spring seat installed)

Intake and exhaust

: 14.3 - 14.9 mm (0.563 - 0.587 in)

PBIC2769E

Paint mark color

Intake

: White

Exhaust

: Blue

SEM085D

CYLINDER HEAD

EM-103

Revision: 2006 August

2006 Murano

Install valve collet.

●

Compress valve spring with the valve spring compressor, the
attachment and the adapter (SST). Install valve collet with a
magnet hand.

CAUTION:

When working, take care not to damage valve lifter holes.

●

Tap valve stem edge lightly with plastic hammer after installa-
tion to check its installed condition.

Install valve lifter.

●

Install it in the original position.

10. Install spark plug tube.

●

Press-fit spark plug tube as follows:

Remove old liquid gasket adhering to cylinder head mounting hole.

Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.
Use Genuine High Strength Locking Sealant or equivalent. Refer to

GI-47, "RECOMMENDED

CHEMICAL PRODUCTS AND SEALANTS"

Using a drift, press-fit spark plug tube so that its height “H” is as
specified in the figure.

CAUTION:

●

When press-fitting, take care not to deform spark plug
tube.

●

After press-fitting, wipe off liquid gasket protruding onto
cylinder-head upper face.

11. Install spark plug with the spark plug wrench (commercial service tool).

Inspection after Disassembly

NBS0029V

VALVE DIMENSIONS

●

Check dimensions of each valve. For the dimensions, refer to

EM-146, "Valve Dimensions"

●

If dimensions are out of the standard, replace valve and check valve seat contact. Refer to

EM-105,

"VALVE SEAT CONTACT"

VALVE GUIDE CLEARANCE
Valve Stem Diameter

Measure the diameter of valve stem with a micrometer.

Valve Guide Inner Diameter

Measure the inner diameter of valve guide with an inside micrometer.

PBIC1803E

Standard press-fit height “H”:

: 38.1 - 39.1 mm (1.500 - 1.539 in)

PBIC2638E

Standard

Intake

: 5.965 - 5.980 mm (0.2348 - 0.2354 in)

Exhaust

: 5.955 - 5.970 mm (0.2344 - 0.2350 in)

SEM938C

EM-104

CYLINDER HEAD

Revision: 2006 August

2006 Murano

Valve Guide Clearance

(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter)

●

If the calculated value exceeds the limit, replace valve and/or valve guide. When valve guide must be
replaced, refer to

EM-104, "VALVE GUIDE REPLACEMENT"

VALVE GUIDE REPLACEMENT

When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.

To remove valve guide, heat cylinder head to 110 to 130

C (230

to 266

F) by soaking in heated oil.

Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US
ton, 2.0 lmp ton) pressure] or hammer and valve guide drift
(commercial service tool).

WARNING:

Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.

Using the valve guide reamer (commercial service tool), ream
cylinder head valve guide hole.

Standard

Intake and Exhaust

: 6.000 - 6.018 mm (0.2362 - 0.2369 in)

Valve guide clearance:

Standard

Intake

: 0.020 - 0.053 mm (0.0008 - 0.0021 in)

Exhaust

: 0.030 - 0.063 mm (0.0012 - 0.0025 in)

Limit

Intake

: 0.08 mm (0.003 in)

Exhaust

: 0.10 mm (0.004 in)

SEM008A

SEM931C

Valve guide hole diameter (for service parts):

Intake and exhaust

: 10.175 - 10.196 mm (0.4006 - 0.4014 in)

SEM932C

CYLINDER HEAD

EM-105

Revision: 2006 August

2006 Murano

Heat cylinder head to 110 to 130

C (230 to 266

F) by soaking in

heated oil.

Using the valve guide drift (commercial service tool), press valve
guide from camshaft side to the dimensions as in the figure.

WARNING:

Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.

Using the valve guide reamer (commercial service tool), apply
reamer finish to valve guide.

VALVE SEAT CONTACT

●

After confirming that the dimensions of valve guides and valves
are within the specifications, perform this procedure.

●

Apply prussian blue (or white lead) onto contacting surface of
valve seat to check the condition of the valve contact on the sur-
face.

●

Check if the contact area band is continuous all around the cir-
cumference.

●

If not, grind to adjust valve fitting and check again. If the contact-
ing surface still has “NG” conditions even after the re-check,
replace valve seat. Refer to

EM-105, "VALVE SEAT REPLACE-

MENT"

VALVE SEAT REPLACEMENT

When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.

Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to

EM-148, "Valve Seat"

CAUTION:

Prevent to scratch cylinder head by excessive boring.

SEM008A

Projection “L”

Intake and exhaust

: 12.6 - 12.8 mm (0.496 - 0.504 in)

SEM950E

Standard:

Intake and exhaust

: 6.000 - 6.018 mm (0.2362 - 0.2369 in)

SEM932C

SBIA0322E

EM-106

CYLINDER HEAD

Revision: 2006 August

2006 Murano

Ream cylinder head recess diameter for service valve seat.

●

Be sure to ream in circles concentric to valve guide center.
This will enable valve to fit correctly.

Heat cylinder head to 110 to 130

C (230 to 266

F) by soaking in

heated oil.

Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head.

WARNING:

Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.

CAUTION:

Avoid directly touching cold valve seats.

Using the valve seat cutter set (commercial service tool) or valve
seat grinder, finish seat to the specified dimensions. Refer to

EM-148, "Valve Seat"

CAUTION:

When using the valve seat cutter, firmly grip cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on with cutter or cutting many different times may
result in stage valve seat.

Using compound, grind to adjust valve fitting.

Check again for normal contact. Refer to

EM-105, "VALVE SEAT CONTACT"

VALVE SPRING SQUARENESS

●

Set a try square along the side of valve spring and rotate spring.
Measure the maximum clearance between the top of spring and
try square.

●

If it exceeds the limit, replace valve spring.

Oversize (Service) [0.5 mm (0.020 in)]

Intake

: 38.500 - 38.516 mm (1.5157 - 1.5164 in)

Exhaust

: 32.700 - 32.716 mm (1.2874 - 1.2880 in)

SEM795A

SEM008A

SEM934C

Limit

: 2.1 mm (0.083 in)

PBIC0080E

CYLINDER HEAD

EM-107

Revision: 2006 August

2006 Murano

VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

●

Check valve spring pressure at the specified spring height.

●

If the installation load or load with valve open is out of the standard, replace valve spring.

Standard:

Intake and exhaust

Free height

: 47.07 mm (1.8531 in)

Installation height

: 37.00 mm (1.457 in)

Installation load

: 166 - 188 N (16.9 - 19.2 kg, 37 - 42 lb)

Height during valve open

: 27.20 mm (1.0709 in)

Load with valve open

: 373 - 421 N (38.0 - 42.9 kg, 84 - 95 lb)

SEM113

EM-108

ENGINE ASSEMBLY

Revision: 2006 August

2006 Murano

ENGINE ASSEMBLY

PFP:10001

Removal and Installation

NBS0029W

Rear engine mounting bracket

RH engine mounting insulator

RH engine mounting bracket

Front engine mounting bracket

Stopper

Front engine mounting insulator

LH engine mounting bracket

LH engine mounting insulator

Engine mounting air guide

10. Rear engine mounting insulator

11.

Stopper

12. Bracket

PBIC4394E

ENGINE ASSEMBLY

EM-109

Revision: 2006 August

2006 Murano

WARNING:

●

Situate the vehicle on a flat and solid surface.

●

Place chocks at front and back of rear wheels.

●

For engines not equipped with engine slingers, attach proper slingers and bolts described in
PARTS CATALOG.

CAUTION:

●

Always be careful to work safely, avoid forceful or uninstructed operations.

●

Do not start working until exhaust system and engine coolant are cool enough.

●

If items or work required are not covered by the engine section, refer to the applicable sections.

●

Always use the support point specified for lifting.

●

Use either 2-pole lift type or separate type lift as best you can. If board-on type is used for
unavoidable reasons, support at the rear axle jacking point with transmission jack or similar tool
before starting work, in preparation for the backward shift of center of gravity.

●

For supporting points for lifting and jacking point at rear axle, refer to

GI-41, "Garage Jack and

Safety Stand"

REMOVAL
Outline

At first, remove the engine, the transaxle and transfer (AWD models) assembly with front suspension member
downward. Then separate the engine, the transaxle and transfer (AWD models).

Rear engine mounting bracket

RH engine mounting insulator

RH engine mounting bracket

Front engine mounting bracket

Front engine mounting insulator

LH engine mounting bracket

LH engine mounting insulator

Rear engine mounting insulator

PBIC4435E

EM-110

ENGINE ASSEMBLY

Revision: 2006 August

2006 Murano

Preparation

Release fuel pressure. Refer to

EC-78, "FUEL PRESSURE RELEASE"

Drain engine coolant. Refer to

CO-9, "Changing Engine Coolant"

CAUTION:

●

Perform this step when the engine is cold.

●

Do not spill engine coolant on drive belts.

Remove the following parts:

●

Engine cover: Refer to

EM-18, "INTAKE MANIFOLD COLLECTOR"

●

Hood assembly: Refer to

BL-13, "HOOD"

●

Front road wheel and tires

●

Undercover and splash guards (RH and LH)

●

Air duct (inlet), air cleaner case (upper) with mass air flow sensor and air duct assembly: Refer to

EM-

16, "AIR CLEANER AND AIR DUCT"

●

Battery, battery tray and battery tray bracket: Refer to

SC-4, "BATTERY"

●

Drive belts: Refer to

EM-13, "DRIVE BELTS"

●

Radiator, reservoir tank of radiator, and system hoses. Refer to

CO-13, "RADIATOR"

●

Front wiper arm: Refer to

WW-4, "FRONT WIPER AND WASHER SYSTEM"

●

Extension cowl top panel (lower and upper): Refer to

EI-20, "COWL TOP"

Disconnect engine room harness at the ECM side.

CAUTION:

To keep clean harness connector and avoid damage and foreign materials, cover them completely
with plastic bags or something similar.

Engine Room

Disconnect heater hoses. Refer to

CO-29, "WATER OUTLET AND WATER PIPING"

●

Install plug to avoid leakage of engine coolant.

Remove EVAP hose. Refer to

EM-18, "INTAKE MANIFOLD COLLECTOR"

Disconnect fuel feed hose (with fuel damper) quick connector at centralized under-floor piping side. Refer
to

EM-41, "FUEL INJECTOR AND FUEL TUBE"

●

Install plug to avoid leakage of fuel.

Disconnect transaxle shift control cable at transaxle side. Refer to

CVT-208, "SHIFT CONTROL SYS-

TEM"

Disconnect brake booster vacuum hose at engine side. Refer to

EM-18, "INTAKE MANIFOLD COLLEC-

TOR"

Remove alternator. Refer to

SC-17, "CHARGING SYSTEM"

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

ATC-133,

"Components"

Disconnect suction hoses of power steering oil pump at reservoir tank side. Refer to

PS-34, "HYDRAULIC

LINE"

●

Install plug to avoid leakage of power steering fluid.

Vehicle Underbody

Remove front drive shafts (right and left sides). Refer to

FAX-7, "FRONT DRIVE SHAFT"

Remove exhaust front tube. Refer to

EX-3, "EXHAUST SYSTEM"

Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.
Refer to

PS-15, "POWER STEERING GEAR"

Disconnect front stabilizer connecting rod. Refer to

FSU-14, "STABILIZER BAR"

Remove strut assembly and steering knuckle fixing nuts and bolts. Refer to

FSU-5, "FRONT SUSPEN-

SION ASSEMBLY"

Remove front brake cylinder body with piping connected, and temporarily secure it to aside for vehicle
side. Refer to

BR-25, "FRONT DISC BRAKE"

Remove propeller shaft (AWD models). Refer to

PR-4, "REAR PROPELLER SHAFT"

ENGINE ASSEMBLY

EM-111

Revision: 2006 August

2006 Murano

Disconnect power steering piping at a point between vehicle and engine. Refer to

PS-34, "HYDRAULIC

LINE"

●

Install plug to avoid leakage of power steering fluid.

Remove rear plate cover from oil pan (upper). Then remove bolts fixing drive plate to torque converter.
Refer to

EM-29, "OIL PAN AND OIL STRAINER"

and

CVT-229, "TRANSAXLE ASSEMBLY"

10. Remove transaxle joint bolts which pierce at oil pan (upper) lower rear side. Refer to

CVT-229, "TRAN-

SAXLE ASSEMBLY"

11. Remove crankshaft position sensor (POS).

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.

Removal Work

Use a manual lift table caddy (commercial service tool) or equiv-
alently rigid tool such as a transmission jack. Securely support
bottom of front suspension member.

CAUTION:

Put a piece of wood or something similar as the supporting
surface, secure a completely stable condition.

Remove RH engine mounting insulator and RH engine mounting bracket.

Remove mounting bolt between transverse link and front suspension member with power tool.

Remove front suspension member mounting nuts and bolts. Refer to

FSU-5, "FRONT SUSPENSION

ASSEMBLY"

Carefully lower jack, or raise lift to remove the engine, the transaxle and transfer (AWD models) assembly
and front suspension member. When performing work, observe the following caution:

CAUTION:

●

Confirm there is no interference with the vehicle.

●

Make sure all connection points have been disconnected.

●

Keep in mind the center of vehicle gravity changes. If necessary, use jack(s) to support the vehi-
cle at rear jacking point(s) to prevent it from falling it off the lift.

PBIC1190E

EM-112

ENGINE ASSEMBLY

Revision: 2006 August

2006 Murano

Separation Work

Install engine slingers into front of cylinder head (right bank) and
rear of cylinder head (left bank).

Remove power steering oil pump, power steering piping and power steering bracket from engine, tran-
saxle and transfer (AWD models) assembly. Refer to

PS-34, "HYDRAULIC LINE"

Remove starter motor. Refer to

SC-9, "STARTING SYSTEM"

Disconnect harness connector of front engine mounting insulator and rear engine mounting insulator
(AWD models).

Lift with hoist and separate engine, transaxle and transfer (AWD models) assembly from front suspension
member.

CAUTION:

●

Before and during this lifting, always check if any harnesses are left connected.

●

Avoid damage to and oil/grease smearing or spills onto engine mounting insulator.

Remove each engine mounting insulator and each engine mounting bracket from engine, transaxle and
front suspension member.

Separate engine, transaxle and transfer (AWD models) assembly. Refer to

CVT-229, "TRANSAXLE

ASSEMBLY"

INSTALLATION

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

●

Do not allow engine mounting insulator to be damage and careful no oil gets on it.

●

For a path with a specified installation orientation, refer to component figure in

EM-108, "Removal and

Installation"

●

Make sure all mounting insulators are seated properly, then tighten mounting nuts and bolts.

INSPECTION AFTER INSTALLATION
Inspection for Leaks

The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

●

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

●

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.

PBIC2483E

ENGINE ASSEMBLY

EM-113

Revision: 2006 August

2006 Murano

●

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.

●

Bleed air from lines and hoses of applicable lines, such as in cooling system.

●

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.

Summary of the inspection items:

*: Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Items

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Other oils and fluid*

Level

Leakage

Level

Fuel

Leakage

Exhaust gases

—

Leakage

—

EM-114

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

CYLINDER BLOCK

PFP:11010

Disassembly and Assembly

NBS0029X

PBIC4189E

CYLINDER BLOCK

EM-115

Revision: 2006 August

2006 Murano

●

Refer to

GI-10, "Components"

for symbol marks in the figure.

DISASSEMBLY

Remove engine assembly from the vehicle, and separate front suspension member, transaxle and trans-
fer (AWD models) assembly from engine. Refer to

EM-108, "ENGINE ASSEMBLY"

Remove exhaust manifolds (right and left banks). Refer to

EM-25, "EXHAUST MANIFOLD AND THREE

WAY CATALYST"

Remove oil cooler, water pipes and water hoses. Refer to

LU-10, "OIL COOLER"

●

When removing water drain plug, engine coolant remaining in the engine is drained. Use tray to collect
it.

Reinforcement plate

Drive plate

Rear oil seal retainer

Knock sensor

Cylinder block

Thrust bearing (upper)

Main bearing (upper)

Crankshaft

Crankshaft key

10. Thrust bearing (lower)

11. Main bearing (lower)

12. Main bearing cap

13. Main bearing cap bolt

14. Main bearing beam

15. Baffle plate

16. Connecting rod bolt

17. Connecting rod bearing cap

18. Connecting rod bearing

19. Connecting rod

20. Snap ring

21. Piston pin

22. Piston

23. Oil ring

24. Second ring

25. Top ring

26. Pilot converter

27. Oil jet

Crankshaft side

Chamfered

Refer to

EM-120

Cylinder block

Gasket

Cylinder block heater

Connector protector cap

PBIC2684E

EM-116

CYLINDER BLOCK

Revision: 2006 August

2006 Murano

Install engine sub-attachment with engine stand shaft (SST) to
right side of cylinder block.

●

Use a spacer to engine front side.

Lift engine, and mount it onto engine stand (SST).

●

A widely use engine stand can be used.

CAUTION:

Use an engine stand that has a load capacity [approxi-
mately 220 kg (441 lb) or more] large enough for support-
ing the engine weight.

NOTE:
This example is an engine stand for holding at transaxle
mounting side with drive plate removed.

Drain engine oil. Refer to

LU-8, "Changing Engine Oil"

PBIC4891E

PBIC2685E

PBIC0085E

Content .. 125 126 127 128 ..