2006 INFINITI M35 spark

EM-192
[VK45DE]
SPARK PLUG (PLATINUM-TIPPED TYPE)
Revision: 2006 January2006 M35/M45
CAUTION:
Do not drop or shock spark plug.
Do not use wire brush for cleaning.
If plug tip is covered with carbon, spark plug cleaner may
be used.
Checking and adjusting plug gap is not required between
change intervals.
INSTALLATION
Installation is the reverse order of removal.Cleaner air pressure:
Less than 588 kPa (6 kg/cm
2 , 85 psi)
Cleaning time:
Less than 20 seconds
SMA773C
SMA806CA

FUEL INJECTOR AND FUEL TUBE
EM-193
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Revision: 2006 January2006 M35/M45
FUEL INJECTOR AND FUEL TUBEPFP:16600
ComponentsNBS004P3
CAUTION:
Do not remove or disassemble parts unless instructed as shown in the figure.
Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS004P4
REMOVAL
WAR NING :
Put a “CAUTION: FLAMMABLE” sign in the workshop.
Be sure to work in a well ventilated area and furnish workshop with a CO2 fire extinguisher.
Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
To avoid the danger of being scalded, do not drain engine coolant when engine is hot.
1. Remove engine room cover (RH and LH). Refer to EM-173, "
ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-179, "
INTAKE MANIFOLD" .
3. Release fuel pressure. Refer to EC-809, "
FUEL PRESSURE RELEASE" .
1. Quick connector cap 2. Fuel feed hose 3. Fuel feed hose bracket
4. Quick connector cap 5. O-ring 6. Fuel tube (RH)
7. Spacer 8. Fuel feed damper 9. Fuel damper and fuel hose assembly
10. Clip 11. O-ring (Green) 12. Fuel injector
13. O-ring (Black) 14. Fuel tube (LH)
A. To centralized under-floor piping B. Refer to EM-193
PBIC3302E

EM-194
[VK45DE]
FUEL INJECTOR AND FUEL TUBE
Revision: 2006 January2006 M35/M45
4. Disconnect fuel feed hose on engine side as follows: (Perform
same procedure for the side of centralized under-floor piping as
well.)
a. Remove quick connector cap from quick connector connection.
b. Disconnect quick connector from fuel feed damper as follows:
CAUTION:
Disconnect quick connector by using quick connector release [SST: J-45488], not by picking out
retainer tabs (centralized under-floor piping side).
i. With the sleeve side of quick connector release facing to quick connector, install quick connector release
onto fuel tube.
ii. Insert quick connector release into quick connector until sleeve
contacts and goes no further. Hold quick connector release on
that position.
CAUTION:
Inserting quick connector release hard will not disconnect
quick connector. Hold quick connector release where it
contacts and goes no further.
iii. Draw and pull out quick connector straight from fuel feed
damper.
CAUTION:
Pull quick connector holding “A” position as shown in
the figure.
Do not pull with lateral force applied. O-ring inside quick connector may be damaged.
Prepare container and cloth beforehand as fuel will leak out.
Avoid fire and sparks.
Keep parts away from heat source. Especially, be careful when welding is performed around
them.
Do not expose parts to battery electrolyte or other acids.
Do not bend or twist connection between quick connector and fuel feed hose during installa-
tion/removal.
PBIC3828E
SBIA0354E
KBIA0702E

CYLINDER HEAD
EM-233
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Revision: 2006 January2006 M35/M45
CYLINDER HEADPFP:11041
On-Vehicle ServiceNBS004PF
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-809, "
FUEL PRESSURE RELEASE" .
a. Remove fuel pump fuse to avoid fuel injection during measure-
ment.
3. Remove engine cover with power tool. Refer to EM-173, "
ENGINE ROOM COVER" .
4. Remove ignition coil and spark plug from each cylinder. Refer to EM-190, "
IGNITION COIL" and EM-191,
"SPARK PLUG (PLATINUM-TIPPED TYPE)" .
5. Connect engine tachometer (not required in use of CONSULT-II).
6. Install compression gauge with adapter (SST or commercial ser-
vice tool) onto spark plug hole.
Use compression gauge adapter (SST) which is required on
No. 7 and 8 cylinders.
Use compression gauge adapter (if no SST is used) 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 cyl-
inder head during removal.
7. 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/cm2 , psi) /rpm
CAUTION:
Always use a fully changed battery to obtain the specified engine speed.
PBIB1482E
PBIC1554E
SBIA0533E
Standard Minimum Deferential limit between cylinders
1,320 (13.5, 191) / 300 1,130 (11.5, 164) / 300 98 (1.0, 14) / 300

EM-234
[VK45DE]
CYLINDER HEAD
Revision: 2006 January2006 M35/M45
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 the spark plug
hole of the cylinder to re-check it for compression.
–If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the
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.
8. After inspection is completed, install removed parts in the reverse order of removal.
9. Start engine, and make sure that engine runs smoothly.
10. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-811, "
TROUBLE DIAGNOSIS" .
ComponentsNBS004PG
Removal and InstallationNBS004PH
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-244, "ENGINE ASSEMBLY" .
2. Remove exhaust manifold. Refer to EM-183, "
EXHAUST MANIFOLD AND THREE WAY CATALYST" .
3. Remove camshaft. Refer to EM-215, "
CAMSHAFT" .
1. Engine coolant temperature sensor 2. Washer 3. Cylinder head gasket (left bank)
4. Harness bracket 5. Cylinder head (right bank) 6. Cylinder head bolt
7. Cylinder head gasket (right bank) 8. Cylinder head bolt 9. Cylinder head (left bank)
PBIC2756E

CYLINDER HEAD
EM-237
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Revision: 2006 January2006 M35/M45
Disassembly and AssemblyNBS004PI
COMPONENTS
DISASSEMBLY
1. Remove spark plug with spark plug wrench (commercial service tool).
2. Remove adjusting shim and 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 magnetic
hand.
CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove valve spring retainer and valve spring (with valve spring seat).
CAUTION:
Do not remove valve spring seat from valve spring.
5. Push valve stem to combustion chamber side, and remove valve.
1. Spark plug 2. Adjusting shim 3. Valve lifter
4. Valve collet 5. Valve spring retainer 6. Valve spring (with valve spring seat)
7. Valve oil seal 8. Valve guide 9. Valve seat
10. Valve (INT) 11. Valve (EXH) 12. Cylinder head (left bank)
13. Spark plug tube 14. Cylinder head (right bank)
PBIC2757E
PBIC2360E

EM-238
[VK45DE]
CYLINDER HEAD
Revision: 2006 January2006 M35/M45
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-242, "
VALVE SEAT REPLACEMENT" .
8. If valve guide must be replaced, refer to EM-240, "
VALVE GUIDE REPLACEMENT" .
9. Remove spark plug tube, as necessary.
Using pair of 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-240, "VALVE GUIDE REPLACEMENT" .
2. When valve seat is removed, install it. Refer to EM-242, "
VALVE SEAT REPLACEMENT" .
3. Install new valve oil seal as follows:
a. Apply new engine oil on valve oil seal joint and seal lip.
b. Install with valve oil seal drift (SST) to match dimension in the
figure.
4. Install valve.
Install in the original position.
NOTE:
Larger diameter valves are for intake side.
5. Install valve spring (with valve spring seat).
Install smaller pitch (valve spring seat side) to cylinder head
side.
6. Install valve spring retainer.
PBIC0072E
PBIC0073E
PBIC0074E

CYLINDER HEAD
EM-239
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Revision: 2006 January2006 M35/M45
7. Install valve collet.
Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with magnetic
hand.
CAUTION:
When working, take care not to damage valve lifter holes.
Tap stem edge lightly with plastic hammer after installation to
check its installed condition.
8. Install valve lifter and adjusting shim.
Install it in the original position.
9. 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 GI-48, "
RECOMMENDED
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.
10. Install spark plug with spark plug wrench (commercial service tool).
Inspection after DisassemblyNBS004PJ
VALVE DIMENSIONS
Check the dimensions of each valve. For the dimensions, refer
to EM-280, "
Valve Dimensions" .
If the dimensions are out of the standard, replace valve and
check the valve seat contact. Refer to EM-242, "
VA LV E S E AT
CONTACT" .
PBIC2360E
Standard press-fit height “H” :
: 38.4 - 39.4 mm (1.512 - 1.551 in)
PBIC2638E
SEM188A