2006 INFINITI M35 spark

EM-10
[VQ35DE]
PREPARATION
Revision: 2006 January2006 M35/M45
Commercial Service ToolsNBS004MP
(Kent-Moore No.)
Tool nameDescription
(—)
Power toolLoosening nuts and bolts
(BT3373-F)
Belt tension gaugeChecking drive belt tension
(—)
TORX socketRemoving and installing drive plate
Size: T55
(—)
Manual lift table caddyRemoving and installing engine
(J24239-01)
Cylinder head bolt wrenchLoosening and tightening cylinder head bolt,
and used with the angle wrench [SST:
KV10112100 (BT8653-A)]
a: 13 (0.51) dia.
b: 12 (0.47)
c: 10 (0.39)
Unit: mm (in)
(—)
1.Compression gauge
2.AdapterChecking compression pressure
(—)
Spark plug wrenchRemoving and installing spark plug
PBIC0190E
AMA126
PBIC1113E
ZZA1210D
NT583
ZZA0008D
NT047

EM-42
[VQ35DE]
IGNITION COIL
Revision: 2006 January2006 M35/M45
IGNITION COILPFP:22448
ComponentsNBS004NA
Removal and InstallationNBS004NB
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-14, "ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
3. Remove air duct (inlet) and air duct (at the left bank side, remove ignition coil). Refer to EM-17, "
AIR
CLEANER AND AIR DUCT" .
4. Move aside harness, harness bracket, and hoses located above ignition coil.
5. Disconnect harness connector from ignition coil.
6. Remove ignition coil.
CAUTION:
Do not shock it.
INSTALLATION
Installation is the reverse order of removal.
1. Ignition coil 2. Spark plug 3. Rocker cover
PBIC3111E

SPARK PLUG (PLATINUM-TIPPED TYPE)
EM-43
[VQ35DE]
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Revision: 2006 January2006 M35/M45
SPARK PLUG (PLATINUM-TIPPED TYPE)PFP:22401
ComponentsNBS004NC
Removal and InstallationNBS004ND
REMOVAL
1. Remove ignition coil. Refer to EM-42, "IGNITION COIL" .
2. Remove spark plug with a spark plug wrench (commercial ser-
vice tool).
INSPECTION AFTER REMOVAL
Use the standard type spark plug for normal condition.
The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions
such as:
Frequent engine starts
Low ambient temperatures
The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under condi-
tions such as:
Extended highway driving
Frequent high engine revolution
1. Ignition coil 2. Spark plug 3. Rocker cover
PBIC3111E
SEM294A
MakeNGK
Standard typePLFR5A-11
Hot typePLFR4A-11
Cold typePLFR6A-11
Gap (Nominal) : 1.1 mm (0.043 in)

EM-44
[VQ35DE]
SPARK PLUG (PLATINUM-TIPPED TYPE)
Revision: 2006 January2006 M35/M45
CAUTION:
Do not drop or shock spark plug.
Do not use a 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-45
[VQ35DE]
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Revision: 2006 January2006 M35/M45
FUEL INJECTOR AND FUEL TUBEPFP:16600
ComponentsNBS004NE
CAUTION:
Do not remove or disassemble parts unless instructed as shown in the figure.
Removal and InstallationNBS004NF
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 the engine is hot.
1. Remove engine room cover (RH and LH). Refer to EM-14, "
ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
3. Release fuel pressure. Refer to EC-98, "
FUEL PRESSURE RELEASE" .
4. Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to CO-11, "
Changing Engine Coolant" and EM-19, "INTAKE MANIFOLD COLLECTOR" .
1. Fuel damper 2. O-ring 3. Fuel sub-tube
4. EVAP hose 5. Intake manifold collector (lower) 6. Fuel feed hose (with damper)
7. Fuel tube 8. Spacer 9. Clip
10. O-ring (Black) 11. Fuel injector 12. O-ring (Green)
13. Hose clamp 14. Bracket 15. Quick connector cap
16. Centralized under-floor piping
SBIA0580E

EM-46
[VQ35DE]
FUEL INJECTOR AND FUEL TUBE
Revision: 2006 January2006 M35/M45
CAUTION:
Perform this step when the engine is cold.
5. Remove fuel feed hose (with damper) from fuel sub-tube.
NOTE:
There is no fuel return route.
CAUTION:
While hoses are disconnected, plug them to prevent fuel
from draining.
Do not separate damper and hose.
6. When separating fuel feed hose (with damper) and centralized under-floor piping connection, disconnect
quick connector as follows:
a. Remove quick connector cap from quick connector connection
on right member side.
b. Disconnect fuel feed hose (with damper) from bracket hose
clamp.
c. Disconnect quick connector from centralized under-floor piping as follows:
CAUTION:
Disconnect quick connector by using quick connector release [SST: — (J-45488)], not by picking
out retainer tabs.
i. With the sleeve side of quick connector release facing quick connector, install quick connector release
onto centralized under-floor piping.
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 centralized
under-floor piping.
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 (with damper) dur-
ing installation/removal.
KBIA1293E
PBIC2083E
PBIC1898E

CYLINDER HEAD
EM-101
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Revision: 2006 January2006 M35/M45
CYLINDER HEADPFP:11041
On-Vehicle ServiceNBS004NR
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-98, "
FUEL PRESSURE RELEASE" .
3. Disconnect fuel pump fuse to avoid fuel injection during mea-
surement.
4. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
5. Remove ignition coil and spark plug from each cylinder. Refer to EM-42, "
IGNITION COIL" and EM-43,
"SPARK PLUG (PLATINUM-TIPPED TYPE)" .
6. Connect engine tachometer (not required in use of CONSULT-ll).
7. Install compression gauge with an adapter (commercial service
tool) onto spark plug hole.
Use the adapter 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 the engine rpm. Perform these steps to check each
cylinder.
Compression pressure:
Unit: kPa (kg/cm2 , psi) /rpm
CAUTION:
Always use a fully changed battery to obtain the specified engine speed.
SBIA0466E
PBIC0900E
SBIA0533E
Standard Minimum Deference limit between cylinders
1,275 (13.0, 185) / 300 981 (10.0, 142) / 300 98 (1.0, 14) / 300

EM-102
[VQ35DE]
CYLINDER HEAD
Revision: 2006 January2006 M35/M45
If the engine speed is out of the specified range, check battery liquid for proper gravity. Check the
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 cylinder has 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
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 the engine, and make sure that the engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-100, "
TROUBLE DIAGNOSIS" .
ComponentsNBS004NS
Removal and InstallationNBS004NT
REMOVAL
1. Remove camshaft. Refer to EM-84, "CAMSHAFT" .
NOTE:
It is also possible to perform the following steps 2 and 3 just before removing camshaft.
1. Engine rear lower slinger 2. Cylinder head (left bank) 3. Cylinder head bolt
4. Cylinder head (right bank) 5. Cylinder head gasket (right bank)6. Cylinder head gasket (left bank)
7. Oil level gauge guide
SBIA0581E