NISSAN TEANA 2003 Service Manual

SPARK PLUG (PLATINUM-TIPPED TYPE)
EM-153
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EM

SPARK PLUG (PLATINUM-TIPPED TYPE)PFP:22401
Removal and InstallationBBS004VW
REMOVAL
1. Remove engine cover. Refer to EM-133, "INTAKE MANIFOLD COLLECTOR" .
2. Remove ignition coil. Refer to EM-152, "
IGNITION COIL" .
3. Remove spark plug using spark plug wrench (commercial ser-
vice tool).
CAUTION:
Do not drop or shock it.
INSPECTION AFTER REMOVAL
Use standard type spark plug for normal condition.
Hot type spark plug is suitable when fouling occurs with standard type spark plug under conditions such as:

Frequent engine starts

Low ambient temperatures
Cold type spark plug is suitable when spark plug knock occurs with standard type spark plug under conditions
such as:

Extended highway driving

Frequent high engine revolution
1. Ignition coil 2. Spark plug 3. Rocker cover
A. Left bank
PBIC4359E
SEM294A
MakeNGK
Standard typePLFR5A-11
Hot typePLFR4A-11
Cold typePLFR6A-11
Gap (Nominal) : 1.1 mm (0.043 in)

EM-154
[VQ]
SPARK PLUG (PLATINUM-TIPPED TYPE)

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 (5.88 bar, 6 kg/cm
2 , 85 psi)
Cleaning time:
Less than 20 seconds
SMA773C
SMA806CA

FUEL INJECTOR AND FUEL TUBE
EM-155
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EM

FUEL INJECTOR AND FUEL TUBEPFP:16600
Removal and InstallationBBS004VX

Refer to GI-10, "Components" for symbol marks in the figure.
CAUTION:
Do not remove or disassemble parts unless instructed as shown in the figure.
REMOVAL
WARNING:

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 cover. Refer to EM-133, "
INTAKE MANIFOLD COLLECTOR" .
2. Release the fuel pressure. Refer to EC-392, "
FUEL PRESSURE RELEASE" .
3. Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to CO-34, "
Changing Engine Coolant" and EM-133, "INTAKE MANIFOLD COLLECTOR" .
CAUTION:
Perform this step when engine is cold.
1. Fuel feed hose (with damper) 2. Quick connector cap 3. Centralized under-floor piping
4. Fuel tube 5. Spacer 6. Clip
7.O-ring (black) (VQ23DE)
O-ring (blue) (VQ35DE)8. Fuel injector 9.O-ring (green) (VQ23DE)
O-ring (brown) (VQ35DE)
10. O-ring 11. Fuel damper
A. Refer to EM-157
PBIC4686E

EM-156
[VQ]
FUEL INJECTOR AND FUEL TUBE

4. Remove air duct (inlet), air cleaner case (upper) with mass air flow sensor and air duct assembly. Refer to
EM-131, "
AIR CLEANER AND AIR DUCT" .
5. Remove intake manifold collectors (upper and lower). Refer to EM-133, "
INTAKE MANIFOLD COLLEC-
TOR" .
6. Remove fuel feed hose (with damper) from fuel tube.
CAUTION:

While hose disconnected, plug it to prevent fuel from
draining.

Do not separate fuel damper and fuel feed hose.
7. 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.
b. Disconnect quick connector from centralized under-floor piping as follows:
CAUTION:
Disconnect quick connector by using quick connector release (SST), not by picking out retainer
tabs.
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 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.

To keep clean the connecting portion and to avoid dam-
age and foreign materials, cover them completely with
plastic bags or something similar.
PBIC2468E
PBIC1898E
PBIC1899E

FUEL INJECTOR AND FUEL TUBE
EM-157
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EM

8. Disconnect harness connector from fuel injector.
9. Loosen mounting bolts in the reverse order as shown in the fig-
ure, and remove fuel tube and fuel injector assembly.
CAUTION:
Do not tilt it, or remaining fuel in pipes may flow out from
pipes.
10. Remove spacers on intake manifold.
11. Remove fuel injector from fuel tube as follows:
a. Open and remove clip.
b. Remove fuel injector from fuel tube by pulling straight.
CAUTION:

Be careful with remaining fuel that may go out from fuel
tube.

Be careful not to damage injector nozzle during removal.

Do not bump or drop fuel injector.

Do not disassemble fuel injector.
12. Remove fuel damper from fuel tube.
INSTALLATION
1. Install fuel damper.

When handling new O-rings, be careful of the following caution:
CAUTION:

Handle O-ring with bare hands. Do not wear gloves.

Lubricate O-ring with new engine oil.

Do not clean O-ring with solvent.

Make sure that O-ring and its mating part are free of foreign material.

When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not
to twist or stretch O-ring. If O-ring was stretched while it was being attached, do not insert it
quickly into fuel tube.

Insert new O-ring straight into fuel damper. Do not decenter or twist it.

Insert fuel damper straight into fuel tube.

Tighten mounting bolts evenly in turn.

After tightening mounting bolts, make sure that there is no gap between flange and fuel tube.
2. Install new O-rings to fuel injector paying attention to the following.
SEC999C
PBIC2470E

EM-158
[VQ]
FUEL INJECTOR AND FUEL TUBE

CAUTION:

Upper and lower O-rings are different. Be careful not to confuse them.

Handle O-ring with bare hands. Do not wear gloves.

Lubricate O-ring with new engine oil.

Do not clean O-ring with solvent.

Make sure that O-ring and its mating part are free of foreign material.

When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to
twist or stretch O-ring. If O-ring was stretched while it was being attached, do not insert it
quickly into fuel tube.

Insert O-ring straight into fuel injector. Do not decenter or twist it.
3. Install fuel injector to fuel tube as follows:
a. Insert clip into clip mounting groove on fuel injector.

Insert clip so that protrusion “A” of fuel injector matches cut-
out“A” of clip.
CAUTION:

Do not reuse clip. Replace it with new one.

Be careful to keep clip from interfering with O-ring. If
interference occurs, replace O-ring.
b. Insert fuel injector into fuel tube with clip attached.

Insert it while matching it to the axial center.

Insert fuel injector so that protrusion “B” of fuel tube matches
cutout “B” of clip.

Make sure that fuel tube flange is securely fixed in flange fix-
ing groove on clip.
c. Make sure that installation is complete by checking that fuel
injector does not rotate or come off.

Make sure that protrusions of fuel injectors are aligned with
cutouts of clips after installation.
4. Install spacers on intake manifold.
5. Install fuel tube and fuel injector assembly to intake manifold
CAUTION:
Be careful not to let tip of injector nozzle come in contact with other parts.

Tighten mounting bolts in two steps in numerical order as
shown in the figure.Fuel tube side
VQ23DE : Black
VQ35DE : Blue
Nozzle side
VQ23DE : Green
VQ35DE : Brown
PBIC2545E
1st step
: 10.1 N·m (1.0 kg-m, 7 ft-lb)
2nd step
: 23.6 N·m (2.4 kg-m, 17 ft-lb)
SEC999C

FUEL INJECTOR AND FUEL TUBE
EM-159
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EM

6. Connect fuel injector harness connector.
7. Install intake manifold collectors (upper and lower). Refer to EM-133, "
INTAKE MANIFOLD COLLECTOR"
.
8. Connect fuel feed hose (with damper).

Handling procedure of O-ring is the same as that of fuel damper.

Insert fuel damper straight into fuel tube.

Tighten mounting bolts evenly in turn.

After tightening mounting bolts, make sure that there is no gap between flange and fuel tube.
9. Connect quick connector between fuel feed hose (with damper) and centralized under-floor piping con-
nection as follows:
a. Make sure no foreign substances are deposited in and around centralized under-floor piping and quick
connector, and no damage on them.
b. Thinly apply new engine oil around centralized under-floor piping from tip end to spool end.
c. Align center to insert quick connector straightly into centralized under-floor piping.

Insert quick connector to centralized under-floor piping until
top spool is completely inside quick connector, and 2nd level
spool exposes right below quick connector.
CAUTION:

Hold “A” position as shown in the figure when inserting
centralized under-floor piping into quick connector.

Carefully align center to avoid inclined insertion to pre-
vent damage to O-ring inside quick connector.

Insert until you hear a “click” sound and actually feel the
engagement.

To avoid misidentification of engagement with a similar
sound, be sure to perform the next step.
d. Pull quick connector by hand holding “A” position. Make sure it is completely engaged (connected) so that
it does not come out from centralized under-floor piping.
e. Install quick connector cap to quick connector.

Install quick connector cap with arrow on surface facing in
direction of quick connector [fuel feed hose (with damper)
side].
CAUTION:
If quick connector cap cannot be installed smoothly, quick
connector may have not been installed correctly. Check
connection again.
10. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Check Fuel Leakage
1. Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
NOTE:
Use mirrors for checking at points out of clear sight.
2. Start engine. With engine speed increased, check again for fuel leakage at connection points.
CAUTION:
Do not touch engine immediately after stopped, as engine becomes extremely hot.
PBIC2471E
PBIC2893E

EM-160
[VQ]
ROCKER COVER

ROCKER COVERPFP:13264
Removal and InstallationBBS004VY
REMOVAL
1. Remove engine cover. Refer to EM-133, "INTAKE MANIFOLD COLLECTOR" .
2. Remove intake manifold collectors (upper and lower). (At the right bank side remove) Refer to EM-133,
"INTAKE MANIFOLD COLLECTOR" .
3. Remove ignition coil. Refer to EM-152, "
IGNITION COIL" .
4. Remove PCV hoses from rocker covers.
5. Remove PCV valve and O-ring from rocker cover (right bank), if necessary.
6. Remove oil filler cap from rocker cover (left bank), if necessary.
1. PCV hose 2. Oil filler cap 3. Rocker cover (right bank)
4. PCV hose 5. PCV valve 6. O-ring
7. Rocker cover gasket (right bank) 8. PCV hose 9. Rocker cover gasket (left bank)
10. Rocker cover (left bank)
PBIC2473E

ROCKER COVER
EM-161
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EM

7. Loosen mounting bolts in the reverse order shown in the figure.
8. Remove rocker cover gaskets from rocker covers.
9. Use scraper to remove all trances of liquid gasket from cylinder head and camshaft bracket (No. 1).
CAUTION:
Do not scratch or damage the mating surface when cleaning off old liquid gasket.
INSTALLATION
1. Apply liquid gasket with tube presser [SST: WS39930000] to
joint part among rocker cover, cylinder head and camshaft
bracket (No. 1) as follows:
Use Genuine Liquid Gasket or equivalent.
NOTE:
The figure shows an example of left bank side [zoomed in
shows camshaft bracket (No. 1)].
a. Refer to the figure “a” to apply liquid gasket to joint part of cam-
shaft bracket (No. 1) and cylinder head.
b. Refer to the figure “b” to apply liquid gasket to the figure “a”
squarely.
2. Install new rocker cover gasket to rocker cover.
3. Install rocker cover.

Check if rocker cover gasket is not dropped from installation groove of rocker cover.
PBIC1184E
PBIC2474E

EM-162
[VQ]
ROCKER COVER

4. Tighten mounting bolts two steps separately in numerical order
as shown in the figure.
5. Install oil filer cap to rocker cover (left bank), if removed.
6. Install new O-ring and PCV valve to rocker cover (right bank), if removed.
7. Install PCV hoses.

Insert PCV hose by 25 to 30 mm (0.98 to 1.18 in) from connector end.

When installing, be careful not to twist or come in contact with other parts.
8. Install in the reverse order of removal after this step. 1st step
: 2.0 N·m (0.20 kg-m, 18 in-lb)
2nd step
: 8.3 N·m (0.85 kg-m, 73 in-lb)
PBIC1184E