Nissan Murano Z50 (2003 year). Manual — part 130
CYLINDER HEAD
EM-89
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6.
Remove valve oil seals using valve oil seal puller (special ser-
vice tool).
7.
Remove valve spring seat.
8.
If valve seat must be replaced, refer to
9.
If valve guide must be replaced, refer to
10. Remove spark plug tube, as necessary.
●
Using a pair of pliers, pull spark plug tube out of cylinder
head.
CAUTION:
●
Take care not to damage cylinder head.
●
Once removed, a spark plug tube will be deformed and cannot be reused. Do not remove it
unless absolutely necessary.
Inspection After Disassembly
ABS003MP
CYLINDER HEAD DISTORTION
●
At each of several locations on bottom surface of cylinder head,
measure distortion in six directions.
●
If it exceeds the limit, replace cylinder head.
VALVE DIMENSIONS
●
Check dimensions of each valve. For dimensions, refer to
VALVE GUIDE CLEARANCE
Valve Guide Stem Diameter
●
Measure outer diameter of valve stem with micrometer.
Valve Guide Inner Diameter
●
Measure inner diameter of valve guide with inside micrometer.
PBIC0884E
Limit
: 0.1mm (0.004 in)
SEM861E
SEM188A
Standard
Intake
: 59.65 - 59.80 mm (0.2348 - 0.2354 in)
Exhaust
: 59.55 - 59.70 mm (0.2344 - 0.2350 in)
Standard
Intake and
Exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM938C
EM-90
CYLINDER HEAD
Revision; 2004 April
2003 Murano
Valve Guide Clearance
●
(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter).
●
If it exceeds the limit, replace valve guide.
VALVE GUIDE REPLACEMENT
When valve guide is removed, replace with oversized (0.2 mm, 0.008 in) valve guide.
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 suitable tool.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
3.
Using valve guide reamer, ream cylinder head valve guide hole.
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
: 0.09 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-91
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4.
Heat cylinder head to 110 to 130
°
C (230 to 266
°
F) by soaking in
heated oil.
5.
Press valve guide from camshaft side to dimensions as in illus-
tration.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
6.
Using valve guide reamer, apply reamer finish to valve guide.
VALVE SEAT CONTACT
●
After confirming that the dimensions of valve guides and valves
are within 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.
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-92
CYLINDER HEAD
Revision; 2004 April
2003 Murano
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.
2.
Ream cylinder head recess diameter for service valve seat.
●
Be sure to ream in circles concentric to the 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.
●
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 the seat to the specified dimensions.
CAUTION:
When using valve seat cutter, firmly grip the 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 the cutter or cutting many different times
may result in stage valve seat.
Grind to obtain the dimensions indicated in figure.
*1 : Diameter made by crossing of conic angles 60
°
and 90
°
*2 : Diameter made by crossing of conic angles 90
°
and 120
°
6.
Using compound, grind to adjust valve fitting.
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
SEM934C
Standard :
D1 dia. : 35 mm (1.38 in)*
1
D2 dia. : 36.6 - 36.8 mm (1.441 - 1.449 in)*
2
D3 dia. : 28.7 mm (1.130 in)*
1
D4 dia. : 30.6 - 30.8 mm (1.205 - 1.213 in)*
2
PBIC1150E
CYLINDER HEAD
EM-93
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7.
Check again for normal contact.
VALVE SPRING SQUARENESS
Set try square along the side of valve spring and rotate the spring.
Measure the maximum clearance between the top face of spring and
try square.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
Check valve spring pressure at specified spring height.
ASSEMBLY
1.
When valve guide is removed, install it. Refer to
EM-90, "VALVE GUIDE REPLACEMENT"
.
2.
When valve seat is removed, install it. Refer to
EM-92, "VALVE SEAT REPLACEMENT"
3.
Install valve oil seals.
●
Install with valve oil seal drift (special service tool) to match
dimension in illustration.
4.
Install valve spring seat.
5.
Install the valves.
●
Larger diameter valves are for intake side.
Limit
: 2.0 mm (0.079 in)
PBIC0080E
Standard:
Intake and exhaust
Free height:
45.62 mm (1.7961 in)
Installation height:
37.00 mm (1.4567 in)
Installation load:
184 - 208 N (18.8 - 21.2 kg, 41.4 - 46.8 lb)
Height during valve open:
27.80 mm (1.0945 in)
Load with valve open:
407 - 459 N (41.5 - 46.8 kg, 91.5 - 103.2 lb)
SEM113
Height “H” (Without valve spring seat installed)
Intake and exhaust
: 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC0802E
EM-94
CYLINDER HEAD
Revision; 2004 April
2003 Murano
6.
Install valve spring (uneven pitch type).
●
Install smaller pitch end (paint mark) to cylinder head side
(valve spring seat side).
7.
Install valve spring retainer.
8.
Install valve collet.
●
Compress valve spring with valve spring compressor (special
service tool). 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.
10. Install spark plug tube.
●
Press-fit spark plug tube following procedure below.
a.
Remove old liquid gasket adhering to cylinder-head mounting
hole.
b.
Apply liquid gasket to area within approximately 12 mm (0.47 in)
from edge of spark plug tube press-fit side.
●
Use Genuine RTV Silicone Sealant or equivalent. Refer to
46, "RECOMMENDED CHEMICAL PRODUCTS AND SEAL-
ANTS"
.
c.
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.
SEM085D
PBIC1649E
Standard press-fit height “H” :
: 38.55 - 38.65 mm (1.5177 - 1.5217 in)
KBIA1248E
ENGINE ASSEMBLY
EM-95
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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
PBIC1188E
EM-96
ENGINE ASSEMBLY
Revision; 2004 April
2003 Murano
WARNING:
●
Place chocks at front and back of rear road wheels.
●
For engines not equipped with engine slingers, attach proper slingers and bolts as described in
the NISSAN Parts Catalog.
CAUTION:
●
Do not start working until exhaust system and engine coolant are cool.
●
If items or work required are not covered by the engine main body section, refer to the applicable
sections.
●
Use the correct supporting points for lifting and jacking. Refer to
●
In removing the drive shafts, be careful not to damage any transaxle grease seals.
●
Before separating the engine and transaxle, remove the crankshaft position sensor (POS).
●
Do not damage the edge of the crankshaft position sensor (POS) or the ring gear teeth.
REMOVAL
Outline
At first, remove engine and transmission assembly with suspension member downward. Then separate
engine from transmission.
Preparation
1.
Release fuel pressure. Refer to
EC-66, "FUEL PRESSURE RELEASE"
2.
Drain engine coolant. Refer to
CO-8, "Changing Engine Coolant"
3.
Remove the following parts:
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
PBIC1189E
ENGINE ASSEMBLY
EM-97
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Engine cover; Refer to
EM-16, "INTAKE MANIFOLD COLLECTOR"
●
Engine hood; Refer to
.
●
Front road wheel and tires
●
Engine undercover and splash guards
●
Battery and tray using power tools; Refer to
●
Air duct (inlet); Refer to
EM-14, "AIR CLEANER AND AIR DUCT"
●
Air duct and air cleaner case (upper) assembly with mass air flow sensor; Refer to
●
.
●
Radiator assembly, coolant reservoir, and system hoses. Refer to
CO-12, "Removal and Installation"
●
Windshield wiper arms and font cowl top covers. Refer to
WW-47, "Removal and Installation of Front
Wiper Arms, Adjustment of Wiper Arms Stop Location"
and
.
4.
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
1.
Disconnect heater hoses.
●
Install plug to avoid leakage of engine coolant.
2.
Remove EVAP hose.
3.
Disconnect fuel hose quick connector at centralized under-floor piping side. Refer to
●
Install plug to avoid leakage of fuel.
4.
Disconnect transaxle shift control cable.
5.
Disconnect power brake booster vacuum hose at engine side.
6.
7.
Remove A/C compressor with piping connected, and temporarily secure it aside. Refer to
.
8.
Disconnect reservoir tank for power steering from engine compartment bracket and position it aside.
Vehicle Underbody
1.
Remove LH and RH front drive shafts. Refer to
2.
Remove front exhaust tube using power tools. Refer to
3.
Disconnect power steering gear from steering lower joint. Refer to
4.
Disconnect stabilizer connecting rod. Refer to
5.
Remove propeller shaft (AWD models). Refer to
6.
Disconnect power steering piping from power steering oil cooler. Refer to
●
Install plug to avoid leakage of power steering fluid.
7.
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.
EM-98
ENGINE ASSEMBLY
Revision; 2004 April
2003 Murano
Removal Work
1.
Use manual lift table caddy (commercial service tool) or equiva-
lently rigid tool such as transmission jack. Securely support bot-
tom of front suspension member.
CAUTION:
Put a piece of wood or something similar as the supporting
surface, secure a completely stable condition.
2.
Remove RH engine mounting insulator and RH engine mounting
bracket.
3.
Remove mounting bolt between transverse link and front sus-
pension member with power tool.
4.
Remove front suspension member mounting nuts and bolts.
Refer to
FSU-5, "FRONT SUSPENSION ASSEMBLY"
5.
Carefully lower engine, transaxle, transfer (AWD models) and front suspension member assembly with
manual lift table caddy, avoiding interference with the vehicle body.
CAUTION:
●
Confirm there is no interference with 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 vehicle
at rear jacking point(s) to prevent it from falling it off the lift.
Separation Work
1.
Install engine slingers into rear of left bank cylinder head and
front of right bank cylinder head.
2.
Remove power steering oil pump, power steering piping and power steering bracket from engine, tran-
saxle and transfer (AWD models) assembly. Refer to
3.
Remove starter motor. Refer to
4.
Disconnect harness connector of front engine mounting insulator and rear engine mounting insulator.
5.
Lift with hoist and separate engine, transaxle and transfer (AWD models) assembly from 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.
6.
Separate engine, transaxle and transfer (AWD models) assembly. Refer to
PBIC1190E
SEM807G
SEM808G
ENGINE ASSEMBLY
EM-99
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INSTALLATION
Installation is in the reverse order of removal.
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 gas.
●
Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.
●
After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to
specified level, if necessary.
●
Summary of the inspection items:
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 gas
–
Leakage
–
EM-100
CYLINDER BLOCK
Revision; 2004 April
2003 Murano
CYLINDER BLOCK
PFP:11010
Disassembly and Assembly
ABS0033K
1.
Rear oil seal retainer
2.
Knock sensor
3.
Water connector
4.
Gasket
5.
Cylinder block
6.
Water drain plug (Front)
7.
Main bearing
8.
Thrust bearing
9.
Pilot converter
10. Key
11. Crankshaft
12. Oil jet
13. Main bearing cap
14. Main bearing beam
15. Connecting rod bolt
16. Connecting rod bearing cap
17. Connecting rod bearing
18. Connecting rod
19. Snap ring
20. Piston pin
21. Piston
22. Oil ring
23. Second ring
24. Top ring
25. Drive plate
26. Drive plate reinforcement
27. Block heater (for Canada)
28. O-ring
29. Water drain plug (LH side)
30. Gasket
31. Copper gasket
32. Drain plug
33. Water pipe
PBIC1197E
CYLINDER BLOCK
EM-101
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DISASSEMBLY
1.
Remove engine assembly from vehicle, and separate front suspension member, transaxle and transfer
(AWD models) assembly from engine. Refer to
EM-95, "Removal and Installation"
.
2.
Remove rear engine mounting bracket. Refer to
3.
Remove RH exhaust manifold. Refer to
EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"
4.
Install engine sub-attachment to right side of cylinder block.
●
Use spacer to engine rear side.
1.
Cylinder block
2.
O-ring
3.
Cylinder block heater
4.
Connector protector cap
PBIC1587E
PBIC0920E
EM-102
CYLINDER BLOCK
Revision; 2004 April
2003 Murano
5.
Lift engine, and mount it onto the engine stand.
●
A commercial engine stand can be used.
NOTE:
●
This example is an engine stand for holding at transaxle
mounting side with the drive plate removed.
6.
Drain engine oil and engine coolant from inside of engine.
7.
Remove cylinder head. Refer to
EM-85, "Removal and Installation"
.
8.
Remove knock sensor.
CAUTION:
Carefully handle the sensor avoiding shocks.
9.
Remove drive plate.
●
Loosen mounting bolts in diagonal order.
CAUTION:
●
Do not disassemble drive plate.
●
Never place the drive plate with signal plate facing down.
●
When handling signal plate, take care not to damage or
scratch it.
●
Handle signal plate in a manner that prevents it from
becoming magnetized.
PBIC0805E
PBIC0085E
SEM760G
CYLINDER BLOCK
EM-103
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10. Remove pilot converter using pilot bushing puller (special ser-
vice tool) or suitable tool as necessary.
11. Remove rear oil seal retainer.
●
Remove by inserting a screwdriver between main bearing cap
and rear oil seal retainer.
CAUTION:
If rear oil seal retainer is removed, replace it with a new one.
NOTE:
Rear oil seal and retainer make up a single part and are
removed as an assembly.
12. Remove the piston and connecting rod assembly.
●
Before removing the piston and connecting rod assembly,
check the connecting rod side clearance. Refer to
"CONNECTING ROD SIDE CLEARANCE"
.
a.
Position the crankshaft pin corresponding to the connecting rod
to be removed onto the bottom dead center.
b.
Remove the connecting rod cap.
c.
Using a hammer handle or similar tool, push the piston and con-
necting rod assembly out to the cylinder head side.
13. Remove the connecting rod bearings from connecting rod and
connecting rod cap.
CAUTION:
●
When removing them, note the installation position. Keep them in the correct order.
14. Remove the piston rings form the piston.
●
Use a piston ring expander (commercial service tool).
CAUTION:
●
When removing the piston rings, be careful not to dam-
age the piston.
●
Be careful not to damage piston rings by expanding them
excessively.
15. Remove the piston from the connecting rod as follows.
a.
Using a snap ring pliers, remove the snap ring.
SEM005G
EMQ0191D
PBIC0087E
PBIC1638E
EM-104
CYLINDER BLOCK
Revision; 2004 April
2003 Murano
b.
Heat piston to 60 to 70
°
C (140 to 158
°
F) with drier or equivalent.
c.
Push out piston pin with stick of outer diameter approximately 20
mm (0.79 in).
16. Remove main bearing cap bolt.
NOTE:
Use TORX socket (size E14).
●
Before loosening main bearing cap bolts, measure crankshaft
side clearance. Refer to
●
Loosen them in the numerical order shown in the figure in
several different steps.
17. Remove main bearing beam.
18. Remove main bearing cap.
●
Using main bearing cap bolts, remove main bearing cap while
shaking it back-and-forth.
19. Remove crankshaft.
20. Remove main bearings and thrust bearings from cylinder block
and main bearing cap.
CAUTION:
Identify installation positions, and store them without mix-
ing them up.
21. Remove oil jet.
ASSEMBLY
1.
Fully air-blow the coolant and oil passages in the cylinder block, the cylinder bore and the crankcase to
remove any foreign material.
CAUTION:
Use a goggles to protect your eye.
PBIC1639E
PBIC0262E
PBIC0909E
EMQ0195D
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