Vq23de NISSAN TEANA 2003 Workshop Manual

CYLINDER HEAD
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3. Install valve oil seal.

Install with valve oil seal drift (SST) to match dimension in the
figure.
4. Install valve spring seat.
5. Install valve.

Install it in the original position.
NOTE:
Larger diameter valves are for intake side.
6. Install valve spring (uneven pitch type).

Install narrow pitch end (paint mark) to cylinder head side
(valve spring seat side).

Intake side and exhaust side valve springs are different.
Install them referring to the following paint mark collar.
(VQ23DE)
*: Exhaust side valve spring for VQ23DE has a parallel setting.
7. Install valve spring retainer.
8. Install valve collet.

Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with magnet
hand.
CAUTION:
When working, take care not to damage valve lifter holes.

Tap valve stem edge lightly with plastic hammer after installa-
tion to check its installed condition.
9. Install valve lifter.

Install it in the original position.
10. 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 Thread Locking Sealant or equivalent. Height “H” (Without valve spring seat installed)
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC1611E
Paint mark collar
VQ23DE
Intake : White
Exhaust : Purple or orange*
VQ35DE
Intake, Exhaust : Blue
SEM085D
PBIC1791E

EM-220
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CYLINDER HEAD

5. Using valve guide drift (commercial service tool), press valve
guide from camshaft side to the dimensions as in the figure.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
6. Using valve guide reamer (commercial service tool), apply
reamer finish to valve guide.
VALVE SEAT CONTACT

After confirming that the dimensions of valve guides and valves
are within the specifications, perform this procedure.

Apply prussian blue (or white lead) onto contacting surface of
valve seat to check the condition of the valve contact on the sur-
face.

Check if the contact area band is continuous all around the cir-
cumference.

If not, grind to adjust valve fitting and check again. If the contact-
ing surface still has “NG” conditions even after the re-check,
replace valve seat. Refer to EM-220, "
VALVE SEAT REPLACE-
MENT" .
VALVE SEAT REPLACEMENT
When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-262, "
Va l v e S e a t" .
CAUTION:
Prevent to scratch cylinder head by excessive boring.
2. Ream cylinder head recess diameter for service valve seat.

Be sure to ream in circles concentric to valve guide center.
This will enable valve to fit correctly.Projection “L”
Intake and exhaust
: 12.6 - 12.8 mm (0.496 - 0.504 in)
SEM950E
Standard:
Intake and exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C
SBIA0322E
Oversize [0.5 mm (0.020 in)]
Intake
VQ23DE : 35.500 - 35.516 mm (1.3976 - 1.3983 in)
VQ35DE : 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust
VQ23DE : 30.500 - 30.516 mm (1.2008 - 1.2014 in)
VQ35DE : 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A

CYLINDER HEAD
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3. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
4. Provide valve seat cooled well with dry ice. press-fit valve seat into cylinder head.
CAUTION:

Avoid directly touching cold valve seats.

Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
5. Using valve seat cutter set (commercial service tool) or valve
seat grinder, finish seat to the specified dimensions. Refer to
EM-262, "
Valve Seat" .
CAUTION:
When using valve seat cutter, firmly grip the cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on with cutter or cutting many different times may
result in stage valve seat.
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact. Refer to EM-220, "
VALVE SEAT CONTACT" .
VALVE SPRING SQUARENESS

Set try square along the side of valve spring and rotate spring.
Measure the maximum clearance between the top face of spring
and try square.

If it exceeds the limit, replace valve spring.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

Check valve spring each load at specified spring height.
SEM008A
SEM934C
Limit
Intake
VQ23DE : 2.1 mm (0.083 in)
VQ35DE : 2.1 mm (0.083 in)
Exhaust
VQ23DE : 2.3 mm (0.091 in)
VQ35DE : 2.1 mm (0.083 in)
PBIC0080E
SEM113

EM-222
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CYLINDER HEAD

Standard:
*: Exhaust side valve spring for VQ23DE has a parallel setting.

If the installation load or load with valve open is out of the standard, replace valve spring.
Engine VQ23DE VQ35DE
Position Intake Exhaust* Intake Exhaust
Free height47.15 mm
(1.8563 in)52.28 mm
(2.0583 in)52.31 mm
(2.0594 in)47.07 mm
(1.8531 in)
Installation height37.00 mm
(1.4567 in)37.00 mm
(1.4567 in)37.00 mm
(1.4567 in)37.00 mm
(1.4567 in)
Installation load166 - 188 N
(16.9 - 19.2 kg,
37 - 42 lb)153 - 173 N
(15.6 - 17.6 kg,
34 - 39 lb)153 - 173 N
(15.6 - 17.6 kg,
34 - 39 lb)166 - 188 N
(16.9 - 19.2 kg,
37 - 42 lb)
Height during valve open27.20 mm
(1.0709 in)29.25 mm
(1.1516 in)29.25 mm
(1.1516 in)27.20 mm
(1.0709 in)
Load with valve open373 - 421 N
(38.0 - 42.9 kg,
84 - 95 lb)276 - 312 N
(28.1 - 31.8 kg,
62 - 70 lb)276 - 312 N
(28.1 - 31.8 kg,
62 - 70 lb)373 - 421 N
(38.0 - 42.9 kg,
84 - 95 lb)

ENGINE ASSEMBLY
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ENGINE ASSEMBLYPFP:10001
Removal and InstallationBBS004WA

Refer to GI-10, "Components" for symbol marks in the figure.
WARNING:

Situate vehicle on a flat and solid surface.

Place chocks at front and back of rear wheels.

For engines not equipped with engine slingers, attach proper slingers and bolts described in
PARTS CATALOG.
CAUTION:

Always be careful to work safely, avoid forceful or uninstructed operations.
1. Engine mounting bracket (rear) 2. Engine mounting insulator (RH) 3. Engine mounting bracket (RH)
4. Engine mounting bracket (front) 5. Stopper 6. Engine mounting insulator (front)
7. Engine mounting bracket (LH) 8. Engine mounting insulator (LH) 9. Stopper
10. Engine mounting air guide 11. Engine mounting insulator (rear) 12. Stopper
13. Bracket
A. VQ35DE B. Front mark C. VQ23DE
D. To transaxle
PBIC4525E

ENGINE ASSEMBLY
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Vehicle Underbody
1. Remove front drive shafts (right and left sides). Refer to FAX-8, "FRONT DRIVE SHAFT" .
2. Remove front exhaust tube. Refer to EX-2, "
EXHAUST SYSTEM" .
3. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.
Refer to PS-17, "
POWER STEERING GEAR AND LINKAGE" .
4. Disconnect front stabilizer connecting rod. Refer to FSU-16, "
STABILIZER BAR" .
5. Disconnect power steering piping at a point between vehicle and engine. Refer to PS-39, "
HYDRAULIC
LINE" .

Install plug to avoid leakage of power steering fluid.
6. Remove crankshaft position sensor (POS).
CAUTION:

Handle carefully to avoid dropping and shocks.

Do not disassemble.

Do not allow metal powder to adhere to magnetic part at sensor tip.

Do not place sensor in a location where it is exposed to magnetism.
Removal Work
1. Install engine slingers into front of cylinder head (right bank) and
rear of cylinder head (left bank).
2. Lift with hoist and secure engine in position.
3. Use manual lift table caddy (commercial service tool) or equiva-
lently rigid tool such as transmission jack. Securely support bot-
tom of front suspension member, and simultaneously adjust
hoist tension.
CAUTION:
Put a piece of wood or something similar as the supporting
surface, secure a completely stable condition.
4. Separate engine mounting insulator (RH) and engine mounting bracket (RH).
5. Remove engine mounting (LH) through-bolt. (VQ23DE)
PBIC2483E
PBIC2484E

EM-234
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CYLINDER BLOCK

2. Install each plug to cylinder block as shown in the figure.
NOTE:
Water drain plug at the right bank side for VQ35DE is also used
as a connector of water pipe for oil cooler. Refer to LU-23, "
OIL
COOLER (VQ35DE)" .

Apply sealant to the thread of water drain plug “A”.
Use Anaerobic Liquid Gasket or equivalent.

Apply sealant to the thread of water drain plugs “B” and “D”.
Use Genuine Liquid Gasket or equivalent.

Apply sealant to the thread of plug “C”.
Use Thread Locking Sealant or equivalent.

Replace washers with new one.

Tighten each plug as specified below.
3. Install oil jet. (VQ35DE)

Insert oil jet dowel pin into cylinder block dowel pin hole, and
tighten mounting bolts.
4. Install main bearings and thrust bearings as follows:
a. Remove dust, dirt, and engine oil on bearing mating surfaces of cylinder block and main bearing caps.
PBIC2487E
Part WasherTightening torque
VQ23DE VQ35DE
A Yes 62.0 N·m (6.3 kg-m, 46 ft-lb)
B No 9.8 N·m (1.0 kg-m, 87 in-lb)
C Yes 62.0 N·m (6.3 kg-m, 46 ft-lb)
D No 19.6 N·m (2.0 kg-m, 14 ft-lb) 39.2 N·m (4.0 kg-m, 29 ft-lb)
PBIC2488E

CYLINDER BLOCK
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Position each ring with the gap as shown in the figure refer-
ring to the piston front mark.

Install top ring and second ring with the stamped surface fac-
ing upward. (VQ23DE)

Install second ring with the stamped surface facing upward.
(VQ35DE)
NOTE:
If there is no stamped mark on piston ring, no specific orientation is required for installation.
13. Install connecting rod bearings to connecting rod and connecting rod bearing cap.

Before installing connecting rod bearings, apply engine oil to the bearing surface (inside). Do not apply
engine oil to the back surface, but thoroughly clean it.

When installing, align connecting rod bearing stopper protru-
sion with cutout of connecting rod and connecting rod bearing
cap to install.

Ensure the oil hole on connecting rod and that on the corre-
sponding bearing are aligned.
14. Install piston and connecting rod assembly to crankshaft.

Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.

Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.

Match the cylinder position with the cylinder number on connecting rod to install.

Be sure that front mark on piston head is facing front of engine.

Using piston ring compressor (SST) or suitable tool, install
piston with the front mark on the piston head facing the front
of engine.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.
15. Install connecting rod bearing caps.Stamped mark:
To p r i n g : R
Second ring : R2
Stamped mark:
Second ring : R
PBIC2195E
PBIC2067E
PBIC1619E

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CYLINDER BLOCK


Match the stamped cylinder number marks on connecting rod
with those on connecting rod bearing cap to install.

Be sure that front mark on connecting rod bearing cap is fac-
ing front of engine.
16. Tighten connecting rod nuts (VQ23DE) or connecting rod bolts (VQ35DE) as follows:
a. Apply engine oil to the threads and seats of connecting rod nuts or bolts.
b. Tighten connecting rod nuts or bolts.
c. Then tighten all connecting rod nuts or bolts 90 degrees clock-
wise. (Angle tightening)
CAUTION:
Use angle wrench [SST: KV10112100] to check tightening
angle. Do not make judgment by visual inspection.

After tightening connecting rod nuts or bolts, make sure that
crankshaft rotates smoothly.
17. Install rear oil seal retainer to cylinder block.

Apply new engine oil to both oil seal lip and dust seal lip.

Apply a continuous bead of liquid gasket with tube presser
[SST: WS39930000] to rear oil seal retainer as shown in the
figure.
Use Genuine Liquid Gasket or equivalent.
CAUTION:
Replace with a new part.
NOTE:
Regard both rear oil seal and retainer as an assembly.
18. Install pilot converter.

With drift [outer diameter: approx. 33 mm (1.30 in)], press-fit
as far as it will go.
PBIC0809E
: 19.6 N·m (2.0 kg-m, 14 ft-lb)
SEM953E
PBIC2649E
PBIC0899E

EM-240
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CYLINDER BLOCK

*: For the service parts, the grade for fitting cannot be selected between piston pin and connecting rod. (Only “0” grade is available.) The
information at the shipment from the plant is described as a reference.

The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.

For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table.

For details of the measurement method of each part, the reuse standards and the selection method of the
selective fitting parts, refer to the text.
HOW TO SELECT PISTON
When New Cylinder Block is Used
Check the cylinder bore grade (“1”, “2” or “3”) on rear side of cylinder
block, and select piston of the same grade.
NOTE:
Piston is available with piston pin as a set for the service part. (Only
“0” grade piston pin is available.)
When Cylinder Block is Reused
1. Measure the cylinder bore inner diameter. Refer to EM-249, "Cylinder Bore Inner Diameter" .
2. Determine the bore grade by comparing the measurement with
the values under the cylinder bore inner diameter of the “Piston
Selection Table”.
3. Select piston of the same grade.
Piston Selection Table
VQ23DE
Unit: mm (in)
VQ35DE
Unit: mm (in)
NOTE:

Piston is available together with piston pin as assembly.
SEM756G
PBIC0812E
Grade 1 2 (or no mark) 3
Cylinder bore inner diameter85.000 - 85.010
(3.3465 - 3.3468)85.010 - 85.020
(3.3468 - 3.3472)85.020 - 85.030
(3.3472 - 3.3476)
Piston skirt diameter84.980 - 84.990
(3.3457 - 3.3461)84.990 - 85.000
(3.3461 - 3.3465)85.000 - 85.010
(3.3465 - 3.3468)
Grade 1 2 (or no mark) 3
Cylinder bore inner diameter95.500 - 95.510
(3.7598 - 3.7602)95.510 - 95.520
(3.7602 - 3.7606)95.520 - 95.530
(3.7606 - 3.7610)
Piston skirt diameter95.480 - 95.490
(3.7590 - 3.7594)95.490 - 95.500
(3.7594 - 3.7598)95.500 - 95.510
(3.7598 - 3.7602)