Nissan Murano Z50 (2004 year). Manual

OIL SEAL

EM-91

Revision: 2004 November

2004 Murano

Removal and Installation of Front Oil Seal

ABS003MK

REMOVAL

Remove the following parts:

●

Right side front road wheel and tire

●

Splash guard (RH)

●

Drive belts; Refer to

EM-11, "DRIVE BELTS"

●

Crankshaft pulley; Refer to

EM-58, "TIMING CHAIN"

Remove front oil seal using suitable tool.

CAUTION:

Be careful not to damage front timing chain case and crank-
shaft.

INSTALLATION

Apply new engine oil to both oil seal lip and dust seal lip of new front oil seal.

Install front oil seal.

●

Install front oil seal so that each seal lip is oriented as shown
in the figure.

●

Using suitable drift, press-fit until the height of front oil seal is
level with the mounting surface.

–

Suitable drift: outer diameter 60 mm (2.36 in), inner diameter
50 mm (1.97 in).

CAUTION:

●

Be careful not to damage front timing chain case and
crankshaft.

●

Press-fit straight and avoid causing burrs or tilting oil
seal.

Install in the reverse order of removal after this step.

Removal and Installation of Rear Oil Seal

ABS003ML

REMOVAL

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

EM-105, "ENGINE ASSEMBLY"

Install engine sub-attachment with engine stand shaft [SST: KV10117001 (

—

) and KV10106500 (

—

)] to right side of cylinder block, then lift engine, and mount it onto engine stand [SST: ST0501S000

(

—

)]. Refer to

EM-110, "CYLINDER BLOCK"

Remove drive plate. Refer to

EM-110, "CYLINDER BLOCK"

Remove oil pan (upper). Refer to

EM-28, "OIL PAN AND OIL STRAINER"

SEM829E

SEM715A

SEM829E

EM-92

OIL SEAL

Revision: 2004 November

2004 Murano

Use seal cutter [SST] to cut away liquid gasket and remove rear
oil seal retainer.

CAUTION:

Be careful not to damage mating surfaces.
NOTE:
Regard both rear oil seal and retainer a an assembly.

INSTALLATION

Remove old liquid gasket on mating surfaces of cylinder block and upper oil pan using scraper.

Apply new engine oil to both oil seal lip and dust seal lip of new rear oil seal retainer.

Apply a continuous bead of liquid gasket with tube presser [SST:
WS39930000 (

—

)] to rear oil seal retainer as shown in the

figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

CAUTION:

Attaching should be done within 5 minutes after coating.

Install rear oil seal retainer to cylinder block. Refer to

EM-110, "CYLINDER BLOCK"

Install in the reverse order of removal after this step.

SEM830E

PBIC2661E

CYLINDER HEAD

EM-93

Revision: 2004 November

2004 Murano

CYLINDER HEAD

PFP:11041

On-Vehicle Service

ABS00A3P

CHECKING COMPRESSION PRESSURE

Warm up engine thoroughly. Then, stop it.

Release fuel pressure. Refer to

EC-45, "FUEL PRESSURE RELEASE"

Disconnect fuel pump fuse to avoid fuel injection during mea-
surement.

Remove engine cover. Refer to

EM-16, "INTAKE MANIFOLD COLLECTOR"

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

EM-37, "IGNITION COIL"

and

EM-38,

"SPARK PLUG (PLATINUM-TIPPED TYPE)"

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

Install compression tester with adapter onto spark plug hole.

●

Use compression gauge 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.

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

Compression pressure:

Unit: kPa (kg/cm

, psi) /rpm

CAUTION:

Always use a fully changed battery to obtain specified engine speed.

PBIB1375E

PBIC1186E

SBIA0533E

Standard

Minimum

Deference limit between cylinders

1,275 (13.0, 185) / 300

981 (10.0, 142) / 300

98 (1.0, 14) / 300

EM-94

CYLINDER HEAD

Revision: 2004 November

2004 Murano

●

If the engine speed is out of specified range, check battery liquid for proper gravity. Check 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 cylinders have low compression pressure, pour small amount of engine oil into spark plug hole
of cylinder to re-check it for compression.

–

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

After inspection is completed, install removed parts.

10. Start engine, and make sure that engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to

EC-71, "TROUBLE DIAGNOSIS"

Removal and Installation

ABS00A3Q

REMOVAL

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

EM-105, "ENGINE ASSEMBLY"

Install engine sub-attachment with engine stand shaft [SST: KV10117001 and KV10106500] to right side
of cylinder block, then lift engine, and mount it onto engine stand [SST: ST0501S000]. Refer to

EM-110,

"CYLINDER BLOCK"

Remove camshaft. Refer to

EM-77, "CAMSHAFT"

Cylinder head (left bank)

Cylinder head bolt

Cylinder head (right bank)

Cylinder head gasket (right bank)

Cylinder head gasket (left bank)

Oil level gauge

PBIC2479E

CYLINDER HEAD

EM-95

Revision: 2004 November

2004 Murano

Remove engine slingers.

Remove the following parts:

●

Fuel tube and fuel injector assembly; Refer to

EM-40, "FUEL INJECTOR AND FUEL TUBE"

●

Intake manifold; Refer to

EM-21, "INTAKE MANIFOLD"

●

Exhaust manifold; Refer to

EM-23, "EXHAUST MANIFOLD AND THREE WAY CATALYST"

●

Water inlet and thermostat assembly; Refer to

CO-27, "WATER INLET AND THERMOSTAT ASSEM-

BLY"

●

Water outlet, water bypass pipe, heater pipe and water connector; Refer to

CO-29, "WATER OUTLET

AND WATER PIPING"

Remove cylinder head bolts in reverse order as shown in the fig-
ure with cylinder head bolt wrench (commercial service tool) to
remove cylinder heads (right and left banks).

Remove cylinder head gaskets.

INSPECTION AFTER REMOVAL
Cylinder Head Bolts Outer Diameter

●

Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between “d1” and “d2”
exceeds the limit, replace them with new one.

●

If reduction of outer diameter appears in a position other than
“d2”, use it as “d2” point.

PBIC2057E

Limit (“d1” – “d2”)

: 0.11 mm (0.0043 in)

PBIC2480E

EM-96

CYLINDER HEAD

Revision: 2004 November

2004 Murano

Cylinder Head Distortion

NOTE:
When performing this inspection, cylinder block distortion should be also checking. Refer to

EM-130, "CYLIN-

DER BLOCK DISTORTION"

Wipe off oil and remove scale, gasket, sealant and carbon deposits from surface of cylinder head with
scraper.

CAUTION:

Use utmost care not to allow gasket debris to enter passages for engine oil or engine coolant.

At each of several locations on bottom surface of cylinder head,
measure the distortion in six directions.

●

If it exceeds the limit, replace cylinder head.

INSTALLATION

Install new cylinder head gaskets.

Turn crankshaft until No. 1 piston is set at TDC.

●

Crankshaft key should line up with the right bank cylinder cen-
ter line as shown in the figure.

Install cylinder head follow the steps below to tighten cylinder
head bolts in numerical order as shown in the figure.

Apply new engine oil to threads and seat surfaces of cylinder
head bolts.

Tighten all cylinder head bolts.

Completely loosen all cylinder head bolts.

CAUTION:

In step “c”, loosen bolts in reverse order of that indicated in
the figure.

Tighten all cylinder head bolts.

Limit

: 0.1 mm (0.004 in)

SEM861E

SEM532G

: 98.1 N·m (10 kg-m, 72 ft-lb)

: 0 N·m (0 kg-m, 0 ft-lb)

: 39.2 N·m (4.0 kg-m, 29 ft-lb)

PBIC2057E

CYLINDER HEAD

EM-97

Revision: 2004 November

2004 Murano

Turn all cylinder head bolts 90 degrees clockwise. (Angle tight-
ening)

CAUTION:

Check the tightening angle by using angle wrench [SST].
Avoid judgment by visual inspection without tool.

●

Check tightening angle indicated on angle wrench [SST] indi-
cator plate.

Turn all cylinder head bolts 90 degrees clockwise again. (Angle
tightening)

After installing cylinder head, measure distance between front
end faces of cylinder block and cylinder head (left and right
banks).

●

If the measured value is out of the standard, re-install cylinder
head.

Install in the reverse order of removal after this step.

PBIC1613E

Standard

: 14.1 - 14.9 mm (0.555 - 0.587 in)

EMQ0662D

EM-98

CYLINDER HEAD

Revision: 2004 November

2004 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, working fluid,
fuel and exhaust gases.

●

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

●

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

Summary of the inspection items:

Disassembly and Assembly

ABS00A3R

Item

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Working fluid

Level

Leakage

Level

Fuel

—

Leakage

—

Exhaust gases

—

Leakage

—

Valve lifter

Valve collet

Valve spring retainer

Valve spring

Valve oil seal

Valve spring seat

Valve guide

Spark plug

Spark plug tube

PBIC2637E

CYLINDER HEAD

EM-99

Revision: 2004 November

2004 Murano

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 valve spring compressor, attach-
ment and adapter [SST]. Remove valve collet with 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.

Remove valve oil seal with valve oil seal puller [SST].

If valve seat must be replaced, refer to

EM-103, "VALVE SEAT REPLACEMENT"

If valve guide must be replaced, refer to

EM-101, "VALVE GUIDE REPLACEMENT"

Remove spark plug tube, as necessary.

●

Using 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-101, "VALVE GUIDE REPLACEMENT"

When valve seat is removed, install it. Refer to

EM-103, "VALVE SEAT REPLACEMENT"

Install valve oil seal.

●

Install with valve oil seal drift [SST] to match dimension in the
figure.

10. Cylinder head (right bank)

11.

Valve seat

12. Valve (EXH)

13. Valve (INT)

14. Cylinder head (left bank)

PBIC1791E

PBIC1610E

Height “H” (Without valve spring seat installed)

Intake and exhaust

: 14.3 - 14.9 mm (0.563 - 0.587 in)

PBIC1611E

EM-100

CYLINDER HEAD

Revision: 2004 November

2004 Murano

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 collar.

Install valve spring retainer.

Install valve collet.

●

Compress valve spring with valve spring compressor, attach-
ment and adapter [SST]. Install valve collet with 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 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 spark plug wrench (commercial service tool).

Paint mark collar

Intake

: White

Exhaust

: Blue

SEM085D

PBIC1791E

Standard press-fit height “H” :

: 38.1 - 39.1 mm (1.500 - 1.539 in)

PBIC2638E

CYLINDER HEAD

EM-101

Revision: 2004 November

2004 Murano

Inspection After Disassembly

ABS00A3S

VALVE DIMENSIONS

●

Check dimensions of each valve. For dimensions, refer to

EM-

141, "Valve Dimensions"

●

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

EM-103, "VALVE SEAT CONTACT"

VALVE GUIDE CLEARANCE
Valve Stem Diameter

Measure the diameter of valve stem with micrometer.

Valve Guide Inner Diameter

Measure the inner diameter of valve guide with inside micrometer.

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-101, "VALVE GUIDE REPLACEMENT"

VALVE GUIDE REPLACEMENT

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

SEM188A

Standard

Intake

: 5.965 - 5.980 mm (0.2348 - 0.2354 in)

Exhaust

: 5.955 - 5.970 mm (0.2344 - 0.2350 in)

SEM938C

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)

EM-102

CYLINDER HEAD

Revision: 2004 November

2004 Murano

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).

CAUTION:

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

Using valve guide reamer (commercial service tool), ream cylin-
der head valve guide hole.

Heat cylinder head to 110 to 130

C (230 to 266

F) by soaking in

heated oil.

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

CAUTION:

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

SEM008A

SEM931C

Valve guide hole diameter (for service parts):

Intake and exhaust

: 10.175 - 10.196 mm (0.4006 - 0.4014 in)

SEM932C

SEM008A

Projection “L”

Intake and exhaust

: 12.6 - 12.8 mm (0.496 - 0.504 in)

SEM950E

CYLINDER HEAD

EM-103

Revision: 2004 November

2004 Murano

Using 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-103, "VALVE SEAT REPLACE-

MENT"

VALVE SEAT REPLACEMENT

When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1.

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-143, "Valve Seat"

CAUTION:

Prevent to scratch cylinder head by excessive boring.

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.

CAUTION:

●

Avoid directly touching cold valve seats.

Standard:

Intake and exhaust

: 6.000 - 6.018 mm (0.2362 - 0.2369 in)

SEM932C

SBIA0322E

Oversize [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

EM-104

CYLINDER HEAD

Revision: 2004 November

2004 Murano

●

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

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

EM-143, "Valve Seat"

CAUTION:

When using 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-103, "VALVE SEAT CONTACT"

VALVE SPRING SQUARENESS

●

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

●

If it exceeds the limit, replace valve spring.

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.

SEM934C

Limit

: 2.1 mm (0.083 in)

PBIC0080E

Standard:

Intake and exhaust

Free height

: 47.07 mm (1.8531 in)

Installation height

: 37.00 mm (1.4567 in)

Installation load

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

Height during valve open

: 27.2 mm (1.0709 in)

Load with valve open

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

SEM113

ENGINE ASSEMBLY

EM-105

Revision: 2004 November

2004 Murano

ENGINE ASSEMBLY

PFP:10001

Removal and Installation

ABS00330

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

PBIC2681E

EM-106

ENGINE ASSEMBLY

Revision: 2004 November

2004 Murano

WARNING:

●

Situate 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 engine, transaxle and transfer (AWD models) assembly with front suspension member from
vehicle downward. Then separate engine, 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

PBIC2682E

Nissan Murano Z50 (2004 year). Manual - part 118