2011 NISSAN TIIDA Spark plug

EM-4
< PRECAUTION >[HR16DE]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint Syst
em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005930910
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution for Procedure without Cowl Top CoverINFOID:0000000005930912
When performing the procedure after removing cowl top cover, cover
the lower end of windshield.
Precaution for Drain CoolantINFOID:0000000005930913
• Drain coolant when engine is cooled.
Precaution for Disconnecting Fuel PipingINFOID:0000000005930914
• Before starting work, make sure no fire or spark producing items are in the work area.
• Release fuel pressure before disassembly.
• After disconnecting pipes, plug openings to stop fuel leakage.
PIIB3706J
Revision: May 2010 2011 Versa

PREPARATIONEM-9
< PREPARATION > [HR16DE]
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Tool name
Description
Power tool Loosening bolts and nuts
Spark plug wrench Removing and installing spark plug
Valve seat cutter set Finishing valve seat dimensions
Piston ring expander Removing and installing piston ring
Valve guide drift Removing and installing valve guide
Valve guide reamer (1): Reaming valve guide inner hole (2): Reaming hole for oversize valve guide
(J-43897-18)
(J-43897-12)
Oxygen sensor thread cleaner Reconditioning the exhaust system threads
before installing a new heated oxygen sensor
(Use with anti-seize lubricant shown below.)
a = 18 mm (0.71 in) dia.
for zirconia heated
oxygen sensor
b = 12 mm (0.47 in) dia. for titania heated
oxygen sensor
PBIC0190E
PBIC3874E
S-NT048
S-NT030
PBIC4012E
PBIC4013E
AEM488
Revision: May 2010 2011 Versa

SPARK PLUGEM-17
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SPARK PLUG
Exploded ViewINFOID:0000000005930928
Removal and InstallationINFOID:0000000005930929
REMOVAL
1. Remove intake manifold. Refer to EM-27, "Removal and Installation".
2. Remove ignition coil. Refer to EM-46, "
Removal and Installation".
3. Remove spark plug with a suitable tool.
INSPECTION AFTER REMOVAL
CAUTION:
• Never drop or shock spark plug.
• Never use a wire brush for cleaning.
• If plug tip is covered with car bon, spark plug cleaner may be
used.
1. Ignition coil 2. Spark plug
PBIC3662E
PBIC3871E
Cleaner air
pressure:Less than 588 kPa (6 kg/cm2, 85 psi)
Cleaning time: Less than 20 seconds
SMA773C
Revision: May 2010 2011 Versa

EM-18
< ON-VEHICLE MAINTENANCE >[HR16DE]
SPARK PLUG
•
Checking and adjusting plug gap is not required between
change intervals.
INSTALLATION
Installation is in the reverse order of removal.
*:Always check with the Parts Department for the latest parts information.
JPBIA0031ZZ
Make : Denso
Part number* : FXE20HE-11
Gap (nominal) : 1.1 mm (0.043 in)
Revision: May 2010 2011 Versa

EM-22
< ON-VEHICLE MAINTENANCE >[HR16DE]
COMPRESSION PRESSURE
COMPRESSION PRESSURE
InspectionINFOID:0000000005930931
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-499, "
Inspection".
3. Remove ignition coil and spark plug from each cylinder. Refer to EM-46, "
Exploded View".
4. Connect an engine tachometer (not required in use of CONSULT-III).
5. Install a compression tester (B) with an adapter (commercial service tool) (A) onto spark plug hole.
• Use the adapter whose picking up end inserted to spark plughole is smaller than 20 mm (0.79 in) in diameter. Otherwise, it
may be caught by cylinder head during removal.
6. 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.
CAUTION:
Always use fully a charged battery to obtain the specified engine speed.
• If the engine speed is out of the specified range, c heck battery liquid for proper gravity. Check engine
speed again with normal battery gravity.
• If compression pressure is below minimum val ue, check valve clearances and parts associated with
combustion chamber (Valve, valve seat, piston, pi ston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure the 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, pi ston rings may be worn out or damaged. Check pis-
ton 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. Repl ace valve or valve seat accordingly.
• If two adjacent cylinders have respectively low co mpression pressure and their compression remains
low even after the addition of engine oil, cylinder head gasket is leaking. In such a case, replace cylinder
head gasket.
7. After inspection is completed, install removed parts.
8. Start the engine, and confirm that the engine runs smoothly.
9. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-114, "
Description".
PBIC3730E
SBIA0533E
Compression Pressure: Refer to EM-111, "General Specification".
Revision: May 2010 2011 Versa

EM-46
< ON-VEHICLE REPAIR >[HR16DE]
IGNITION COIL, SPARK PLUG AND ROCKER COVER
IGNITION COIL, SPARK
PLUG AND ROCKER COVER
Exploded ViewINFOID:0000000005930949
Removal and InstallationINFOID:0000000005930950
REMOVAL
1. Remove intake manifold. Refer to EM-27, "Exploded View".
2. Remove ignition coil. CAUTION:
• Handle ignition coil car efully and avoid impacts.
• Never disassemble.
1. Ignition coil 2. Spark plug3. PCV hose
4. Oil filler cap 5. Rocker cover6. Gasket
7. Bracket 8. O-ring9. PCV valve
10. PCV hose A: To air duct
AWBIA0883GB
Revision: May 2010 2011 Versa

IGNITION COIL, SPARK PLUG AND ROCKER COVER
EM-47
< ON-VEHICLE REPAIR > [HR16DE]
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3. Remove spark plug using suitable tool.
CAUTION:
Never drop or shock it.
4. Remove ground cable (RH).
5. Support the bottom surface of engine using a trans mission jack, and then remove the engine mounting
bracket and insulator (RH). Refer to EM-82, "
Exploded View".
6. Remove fuel tube protector.
7. Disconnect PCV valve hose from PCV valve.
8. Remove oil filler cap.
9. Remove rocker cover. • Loosen bolts in reverse order shown.
NOTE:
13 and 14 shown are used to tighten the fuel tube protector.
10. Remove rocker cover gasket from rocker cover.
11. Use scraper to remove all traces of liquid gasket from cylinder head and front cover.
CAUTION:
Never scratch or damage the mating surface when cleaning off old liquid gasket.
INSPECTION AFTER REMOVAL
CAUTION:
• Never drop or shock spark plug.
• Checking and adjusting spar k plug gap is not required
between change intervals.
• If spark plug tip is covered with carbon, a spark plug cleaner may be used.
PBIC3871E
: Engine front
PBIC3670E
SMA806CA
Cleaner air pressure
: Less than 588 kPa (5.88 bar, 6 kg/cm2, 85 psi)
Cleaning time : Less than 20 seconds
Revision: May 2010 2011 Versa

EM-48
< ON-VEHICLE REPAIR >[HR16DE]
IGNITION COIL, SPARK PLUG AND ROCKER COVER
• Never use wire brush for cleaning spark plug.
INSTALLATION
1. Install the rocker cover with the following procedure.
a. Install the rocker cover gasket to the rocker cover.
• Check for damage or foreign material.
• Make sure that it is securely inserted in the mounting groove of
rocker cover.
• For the two bolt holes shown, push the gasket into the boss for
the rocker cover bolt hole to prevent it from falling.
b. Apply liquid gasket to the position shown. Use Genuine Silicone RTV Sealant or equivalent. Refer to
GI-42, "
Recommended Chemical Product and Sealant"
2. Install rocker cover to the cylinder head. CAUTION:
Make sure the gasket is not dropped.
3. Install rocker cover. • Tighten bolts in two steps separately in numerical order asshown.
4. Installation of the remaining components is in the reverse order of removal.
SMA773C
KBIA3331J
1 : Cylinder head
2 : Front cover
PBIC3671E
: Engine front
PBIC3670E
Revision: May 2010 2011 Versa