Vq23de NISSAN TEANA 2003 Workshop Manual

EM-138
[VQ]
INTAKE MANIFOLD

INTAKE MANIFOLDPFP:14003
Removal and InstallationBBS004VS
NOTE:
Figure is shown as an example VQ35DE. VQ23DE has a different port shape, bolt hole for intake manifold collector (lower) installation
and stud bolt position.
REMOVAL
1. Release fuel pressure. Refer to EC-392, "FUEL PRESSURE RELEASE" .
2. Remove intake manifold collectors (upper and lower). Refer to EM-133, "
INTAKE MANIFOLD COLLEC-
TOR" .
3. Remove fuel tube and fuel injector assembly. Refer to EM-155, "
FUEL INJECTOR AND FUEL TUBE" .
4. Loosen mounting nuts and bolts in the reverse order as shown
in the figure to remove intake manifold.
5. Remove gaskets.
1. Intake manifold 2. Gasket
PBIC2458E
PBIC2459E
PBIC2460E

OIL PAN AND OIL STRAINER
EM-145
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OIL PAN AND OIL STRAINERP F P : 1111 0
Removal and InstallationBBS004VU

Refer to GI-10, "Components" for symbol marks in the figure.
REMOVAL
WARNING:
To avoid the danger of being scalded, do not drain engine oil when engine is hot.
NOTE:
When removing oil pan (lower) or oil strainer only, take step 1 then step 10 and 11.
1. Drain engine oil. Refer to LU-21, "
Changing Engine Oil" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine oil on drive belts.
2. Drain engine coolant. Refer to CO-34, "
Changing Engine Coolant" .
1. Oil pan (upper) 2. O-ring 3. Oil pan gasket (front)
4. Oil pressure switch 5.Plug (VQ23DE)
Relief valve (VQ35DE)6. O-ring
7. Oil cooler 8. Connector bolt 9. Oil filter
10. Oil strainer 11. Drain plug 12. Drain plug washer
13. Oil pan (lower) 14. Rear plate cover 15. Harness bracket
16. Crankshaft position sensor (POS) 17. Seal rubber 18. Oil pan gasket (rear)
A. Refer to LU-22
B. To oil pump C. Oil pan side
D. VQ23DE E. VQ35DE
PBIC4533J

FUEL INJECTOR AND FUEL TUBE
EM-155
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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-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

EM-194
[VQ]
CAMSHAFT


Identify installation positions, and store them without mixing them up.
9. Remove chain tensioners (secondary) from both cylinder heads
(right and left banks).

Remove timing chain tensioner (secondary) with its stopper
pin attached.
NOTE:
Stopper pin was attached when timing chain (secondary) was
removed.
INSPECTION AFTER REMOVAL
Camshaft Runout
1. Put V-block on precise flat table, and support No. 2 and 4 journal
of camshaft.
CAUTION:
Do not support journal No. 1 (on the side of camshaft
sprocket) because it has a different diameter from the other
three locations.
2. Set dial indicator vertically to No. 3 journal.
3. Turn camshaft to one direction with hands, and measure cam-
shaft runout on dial indicator. (Total indicator reading)
4. If it exceeds the limit, replace camshaft.
Camshaft Cam Height
1. Measure camshaft cam height with micrometer.
2. If wear is beyond the limit, replace camshaft.
PBIC2111E
Standard : 0.02 mm (0.0010 in)
Limit : 0.05 mm (0.0020 in)PBIC0929E
Standard cam height
Intake
VQ23DE : 44.265 - 44.455 mm (1.7427 - 1.7502 in)
VQ35DE : 44.865 - 45.055 mm (1.7663 - 1.7738 in)
Exhaust
VQ23DE : 43.405 - 43.595 mm (1.7089 - 1.7163 in)
VQ35DE : 44.865 - 45.055 mm (1.7663 - 1.7738 in)
Cam wear limit
: 0.2 mm (0.008 in)
EMQ0072D

EM-196
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CAMSHAFT


Measure the following parts if out of the limit.
–Dimension “A” for camshaft No. 1 journal
–Dimension “B” for cylinder head No. 1 journal bearing.

Refer to the standards above, and then replace camshaft and/or
cylinder head.
Camshaft Sprocket Runout
1. Put V-block on precise flat table, and support No. 2 and 4 journal of camshaft.
CAUTION:
Do not support journal No. 1 (on the side of camshaft sprocket) because it has a different diameter
from the other three locations.
2. Measure the camshaft sprocket runout with dial indicator. (Total
indicator reading)

If it exceeds the limit, replace camshaft sprocket.
Valve Lifter
Check if surface of valve lifter has any wear or cracks.

If anything above is found, replace valve lifter. Refer to EM-202,
"Valve Clearance" .
Valve Lifter Clearance
VALVE LIFTER OUTER DIAMETER

Measure outer diameter at 1/2 height of valve lifter with
micrometer since valve lifter is in barrel shape.Standard : 27.500 - 27.548 mm (1.0827 - 1.0846 in)
Standard : 27.360 - 27.385 mm (1.0772 - 1.0781 in)
KBIA2404J
Limit : 0.15 mm (0.0059 in)
PBIC0930E
KBIA0182E
Standard
VQ23DE : 29.977 - 29.987 mm (1.1802 - 1.1806 in)
VQ35DE : 33.977 - 33.987 mm (1.3377 - 1.3381 in)
JEM798G

CAMSHAFT
EM-197
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VALVE LIFTER HOLE DIAMETER

Measure inner diameter of valve lifter hole of cylinder head with
inside micrometer.
VALVE LIFTER CLEARANCE

(Valve lifter clearance) = (Valve lifter hole diameter) – (Valve lifter outer diameter)

If out of the standard, referring to each standard of valve lifter outer diameter and valve lifter hole diame-
ter, replace either or both valve lifter and cylinder head.
INSTALLATION
1. Install timing chain tensioners (secondary) on both cylinder
heads (right and left banks).

Install timing chain tensioner (secondary) with its stopper pin
attached.

Install timing chain tensioner (secondary) with sliding part fac-
ing downward on cylinder head (right bank), and with sliding
part facing upward on cylinder head (left bank).

Install new O-ring as shown in the figure.
2. Install valve lifters.

Install them in the original position.
3. Install camshafts.

Install camshaft with dowel pin attached to its front end face
on the exhaust side.Standard
Intake
VQ23DE : 30.015 - 30.031 mm (1.1817 - 1.1823 in)
VQ35DE : 34.000 - 34.016 mm (1.3386 - 1.3392 in)
Exhaust
VQ23DE : 30.003 - 30.019 mm (1.1812 - 1.1818 in)
VQ35DE : 34.000 - 34.016 mm (1.3386 - 1.3392 in)
SEM867E
Standard
Intake
VQ23DE : 0.028 - 0.054 mm (0.0011 - 0.0021 in)
VQ35DE : 0.013 - 0.039 mm (0.0005 - 0.0015 in)
Exhaust
VQ23DE : 0.016 - 0.042 mm (0.0006 - 0.0017 in)
VQ35DE : 0.013 - 0.039 mm (0.0005 - 0.0015 in)
PBIC2111E
KBIA1071E

EM-198
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CAMSHAFT


Follow your identification marks made during removal, or fol-
low the identification marks that are present on new cam-
shafts for proper placement and direction.
VQ23DE
VQ35DE

Install camshafts so that dowel pin hole and dowel pin on front
end face are positioned as shown in the figure. (No. 1 cylinder
TDC on its compression stroke)
NOTE:

Large and small pin holes are located on front end face of
camshaft (INT), at intervals of 180 degrees. Face small dia.
side pin hole upward (in cylinder head upper face direc-
tion).

Though camshaft does not stop at the portion as shown in
the figure, for the placement of cam nose, it is generally
accepted camshaft is placed for the same direction of the
figure.
KBIA1009E
Bank INT/EXH Dowel pinPaint marks
Identification mark
M1 M2
RHINT No White No RE
EXH Yes No Blue RE
LHINT No White No LH
EXH Yes No Blue LH
Bank INT/EXH Dowel pinPaint marks
Identification mark
M1 M2
RHINT No Pink No RE
EXH Yes No Orange RE
LHINT No Pink No LH
EXH Yes No Orange LH
PBIC2478E

EM-206
[VQ]
CAMSHAFT


Thickness of new valve lifter can be identified by stamp marks
on the reverse side (inside the cylinder).
VQ23DE
Available thickness of valve lifter: 27 sizes with range 6.66 to 7.18 mm (0.2622 to 0.2827 in) in steps of
0.02 mm (0.0008 in) (when manufactured at factory). Refer to EM-258, "
Available Valve Lifter" .
VQ35DE
Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of
0.02 mm (0.0008 in) (when manufactured at factory). Refer to EM-258, "
Available Valve Lifter" .
CAUTION:
Install identification letter at the end, “U” and “R”, at each of proper positions. (Be careful of
mis-installation between intake and exhaust)
5. Install selected valve lifter.
6. Install camshaft. Refer to EM-197, "
INSTALLATION" .
7. Manually rotate crankshaft pulley a few rotations.
8. Make sure that the valve clearances for cold engine are within the specifications by referring to the speci-
fied values. Refer to EM-202, "
INSPECTION" .
9. Install all removed parts in the reverse order of removal. Refer to EM-197, "
INSTALLATION" .
10. Warm up the engine, and check for unusual noise and vibration.
KBIA0119E
Stamp mark
Thickness
INT EXH
666U 6.66 mm
668U 6.68 mm
··
··
718U 7.18 mm
Stamp mark
Thickness
INT EXH
788U 788R 7.88 mm
790U 790R 7.90 mm
·· ·
·· ·
840U 840R 8.40 mm

EM-210
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CYLINDER HEAD

CYLINDER HEADPFP:11041
On-Vehicle ServiceBBS004W6
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-392, "
FUEL PRESSURE RELEASE" .
3. Disconnect fuel pump fuse to avoid fuel injection during mea-
surement.
4. Remove engine cover. Refer to EM-133, "
INTAKE MANIFOLD COLLECTOR" .
5. Remove ignition coil and spark plug from each cylinder. Refer to EM-152, "
IGNITION COIL" and EM-153,
"SPARK PLUG (PLATINUM-TIPPED TYPE)" .
6. Connect engine tachometer (not required in use of CONSULT-ll).
7. Install compression tester with adapter onto spark plug hole.

Use compression gauge 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 engine rpm. Perform these steps to check each cyl-
inder.
Compression pressure:
Unit: kPa (bar, kg/cm2 , psi) /rpm
PBIB2110E
PBIC0900E
SBIA0533E
VQ23DE VQ35DE
Standard 1,050 (10.5, 10.7, 152) / 300 1,270 (12.70, 13.0, 184) / 300
Minimum 750 (7.5, 7.7, 109) / 300 980 (9.8, 10.0, 142) / 300
Differential limit between cylinders 100 (1.0, 1.0, 15) / 300 100 (1.0, 1.0, 15) / 300