Nissan Murano Z50 (2004 year). Manual — part 118
OIL SEAL
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Removal and Installation of Front Oil Seal
ABS003MK
REMOVAL
1.
Remove the following parts:
●
Right side front road wheel and tire
●
Splash guard (RH)
●
.
●
Crankshaft pulley; Refer to
2.
Remove front oil seal using suitable tool.
CAUTION:
Be careful not to damage front timing chain case and crank-
shaft.
INSTALLATION
1.
Apply new engine oil to both oil seal lip and dust seal lip of new front oil seal.
2.
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.
3.
Install in the reverse order of removal after this step.
Removal and Installation of Rear Oil Seal
ABS003ML
REMOVAL
1.
Remove engine assembly from vehicle, and separate front suspension member, transaxle and transfer
(AWD models) assembly from engine. Refer to
.
2.
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
.
3.
Remove drive plate. Refer to
4.
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
5.
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
1.
Remove old liquid gasket on mating surfaces of cylinder block and upper oil pan using scraper.
2.
Apply new engine oil to both oil seal lip and dust seal lip of new rear oil seal retainer.
3.
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
GI-47, "RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS"
CAUTION:
Attaching should be done within 5 minutes after coating.
4.
Install rear oil seal retainer to cylinder block. Refer to
.
5.
Install in the reverse order of removal after this step.
SEM830E
PBIC2661E
CYLINDER HEAD
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CYLINDER HEAD
PFP:11041
On-Vehicle Service
ABS00A3P
CHECKING COMPRESSION PRESSURE
1.
Warm up engine thoroughly. Then, stop it.
2.
Release fuel pressure. Refer to
EC-45, "FUEL PRESSURE RELEASE"
3.
Disconnect fuel pump fuse to avoid fuel injection during mea-
surement.
4.
EM-16, "INTAKE MANIFOLD COLLECTOR"
5.
Remove ignition coil and spark plug from each cylinder. Refer to
and
"SPARK PLUG (PLATINUM-TIPPED TYPE)"
6.
Connect engine tachometer (not required in use of CONSULT-ll).
7.
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.
8.
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
2
, 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.
9.
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
Removal and Installation
ABS00A3Q
REMOVAL
1.
Remove engine assembly from vehicle, and separate front suspension member and transaxle from
engine. Refer to
.
2.
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
.
3.
Remove camshaft. Refer to
.
1.
Cylinder head (left bank)
2.
Cylinder head bolt
3.
Cylinder head (right bank)
4.
Cylinder head gasket (right bank)
5.
Cylinder head gasket (left bank)
6.
Oil level gauge
PBIC2479E
CYLINDER HEAD
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4.
Remove engine slingers.
5.
Remove the following parts:
●
Fuel tube and fuel injector assembly; Refer to
EM-40, "FUEL INJECTOR AND FUEL TUBE"
●
Intake 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-
●
Water outlet, water bypass pipe, heater pipe and water connector; Refer to
6.
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).
7.
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
1.
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.
2.
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
1.
Install new cylinder head gaskets.
2.
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.
3.
Install cylinder head follow the steps below to tighten cylinder
head bolts in numerical order as shown in the figure.
a.
Apply new engine oil to threads and seat surfaces of cylinder
head bolts.
b.
Tighten all cylinder head bolts.
c.
Completely loosen all cylinder head bolts.
CAUTION:
In step “c”, loosen bolts in reverse order of that indicated in
the figure.
d.
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
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e.
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.
f.
Turn all cylinder head bolts 90 degrees clockwise again. (Angle
tightening)
4.
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.
5.
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
—
1.
Valve lifter
2.
Valve collet
3.
Valve spring retainer
4.
Valve spring
5.
Valve oil seal
6.
Valve spring seat
7.
Valve guide
8.
Spark plug
9.
Spark plug tube
PBIC2637E
CYLINDER HEAD
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DISASSEMBLY
1.
Remove spark plug with spark plug wrench (commercial service tool).
2.
Remove valve lifter.
●
Identify installation positions, and store them without mixing them up.
3.
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.
4.
Remove valve spring retainer, valve spring and valve spring seat.
5.
Push valve stem to combustion chamber side, and remove valve.
●
Identify installation positions, and store them without mixing them up.
6.
Remove valve oil seal with valve oil seal puller [SST].
7.
If valve seat must be replaced, refer to
EM-103, "VALVE SEAT REPLACEMENT"
8.
If valve guide must be replaced, refer to
EM-101, "VALVE GUIDE REPLACEMENT"
9.
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
1.
When valve guide is removed, install it. Refer to
EM-101, "VALVE GUIDE REPLACEMENT"
.
2.
When valve seat is removed, install it. Refer to
EM-103, "VALVE SEAT REPLACEMENT"
3.
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
4.
Install valve spring seat.
5.
Install valve.
●
Install it in the original position.
NOTE:
Larger diameter valves are for intake side.
6.
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.
7.
Install valve spring retainer.
8.
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.
9.
Install valve lifter.
●
Install it in the original position.
10. Install spark plug tube.
●
Press-fit spark plug tube as follows:
a.
Remove old liquid gasket adhering to cylinder head mounting hole.
b.
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
CHEMICAL PRODUCTS AND SEALANTS"
.
c.
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
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Inspection After Disassembly
ABS00A3S
VALVE DIMENSIONS
●
Check dimensions of each valve. For dimensions, refer to
.
●
If dimensions are out of the standard, replace valve and check
valve seat contact. Refer to
.
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
1.
To remove valve guide, heat cylinder head to 110 to 130
°
C (230
to 266
°
F) by soaking in heated oil.
2.
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.
3.
Using valve guide reamer (commercial service tool), ream cylin-
der head valve guide hole.
4.
Heat cylinder head to 110 to 130
°
C (230 to 266
°
F) by soaking in
heated oil.
5.
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
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6.
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
.
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
CAUTION:
Prevent to scratch cylinder head by excessive boring.
2.
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.
3.
Heat cylinder head to 110 to 130
°
C (230 to 266
°
F) by soaking in
heated oil.
4.
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.
5.
Using valve seat cutter set (commercial service tool) or valve
seat grinder, finish seat to the specified dimensions. Refer to
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.
6.
Using compound, grind to adjust valve fitting.
7.
Check again for normal contact. Refer to
.
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
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ENGINE ASSEMBLY
PFP:10001
Removal and Installation
ABS00330
1.
Rear engine mounting bracket
2.
RH engine mounting insulator
3.
RH engine mounting bracket
4.
Front engine mounting bracket
5.
Stopper
6.
Front engine mounting insulator
7.
LH engine mounting bracket
8.
LH engine mounting insulator
9.
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
.
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).
1.
Rear engine mounting bracket
2.
RH engine mounting insulator
3.
RH engine mounting bracket
4.
Front engine mounting bracket
5.
Front engine mounting insulator
6.
LH engine mounting bracket
7.
LH engine mounting insulator
8.
Rear engine mounting insulator
PBIC2682E
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