2003 NISSAN TEANA Engine

CYLINDER BLOCK
EM-237
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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

EM-238
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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

CYLINDER BLOCK
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Press-fit pilot converter with its chamfer facing crankshaft as
shown in the figure.
19. Install knock sensor.

Install knock sensor so that connector faces front of engine.

After installing knock sensor, connect harness connector, and
lay it out to rear of engine.
CAUTION:

Do not tighten mounting bolt while holding connector.

If any impact by dropping is applied to knock sensor,
replace it with new one.
NOTE:

Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of knock sensor.

Make sure that knock sensor does not interfere with other parts.
20. Note the following, assemble in the reverse order of disassembly after this step.
Drive plate

Install drive plate and reinforcement plate as shown in the fig-
ure.

Fix crankshaft pulley with pulley holder [SST: KV10109300].

Tighten mounting bolts crosswise over several times.
How to Select Piston and Bearing BBS004WC
DESCRIPTION
SEM537E
PBIC0810E
PBIC0910E
Selection points Selection parts Selection items Selection methods
Between cylinder block and
crankshaftMain bearingMain bearing grade
(bearing thickness)Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)
Between crankshaft and con-
necting rodConnecting rod bearingConnecting rod bearing grade
(bearing thickness)Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer
diameter determine connecting
rod bearing selection.
Between cylinder block and pis-
tonPiston and piston pin assembly
(Piston is available together
with piston pin as assembly.)Piston grade
(piston skirt diameter)Piston grade = cylinder bore
grade (inner diameter of bore)
Between piston and connecting
rod*———

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CYLINDER BLOCK


When replacing piston and piston pin assembly, refer to EM-240, "HOW TO SELECT PISTON" .
NOTE:

Piston is available together with piston pin as assembly.

Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts,
no piston pin grades can be selected. (Only “0” grade is available.)
PISTON RING SIDE CLEARANCE

Measure side clearance of piston ring and piston ring groove
with feeler gauge.

If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
replace piston also.
PISTON RING END GAP

Make sure that cylinder bore inner diameter is within the specifi-
cation. Refer to EM-249, "
Cylinder Bore Inner Diameter" .

Lubricate with new engine oil to piston and piston ring, and then
insert piston ring until middle of cylinder with piston, and mea-
sure piston ring end gap with feeler gauge.Standard:
VQ23DE
Top ring : 0.045 - 0.080 mm (0.0018 - 0.0031 in)
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.045 - 0.125 mm (0.0018 - 0.0049 in)
VQ35DE
Top ring : 0.045 - 0.080 mm (0.0018 - 0.0031 in)
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.065 - 0.135 mm (0.0026 - 0.0053 in)
Limit:
Top ring : 0.11 mm (0.0043 in)
2nd ring : 0.10 mm (0.004 in)
SEM024AA
Standard:
VQ23DE
Top ring : 0.20 - 0.30 mm (0.008 - 0.012 in)
2nd ring : 0.31 - 0.46 mm (0.0122 - 0.0181 in)
Oil ring : 0.20 - 0.60 mm (0.008 - 0.0236 in)
VQ35DE
Top ring : 0.23 - 0.33 mm (0.0091 - 0.0130 in)
2nd ring : 0.33 - 0.48 mm (0.0130 - 0.0189 in)
Oil ring : 0.20 - 0.50 mm (0.008 - 0.02 in)
Limit:
VQ23DE
Top ring : 0.54 mm (0.0213 in)
2nd ring : 0.67 mm (0.0264 in)
Oil ring : 0.95 mm (0.0374 in)
VQ35DE
Top ring : 0.47 mm (0.0185 in)
2nd ring : 0.59 mm (0.0232 in)
Oil ring : 0.76 mm (0.0299 in)
PBIC0118E

EM-248
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CYLINDER BLOCK

Piston Pin Outer Diameter
Measure the outer diameter of piston pin with micrometer.
Connecting Rod Bushing Oil Clearance
(Connecting rod bushing oil clearance) = (Connecting rod bushing inner diameter) – (Piston pin outer diame-
ter)

If the calculated value exceeds the limit, replace connecting rod assembly and/or piston and piston pin
assembly.

If replacing piston and piston pin assembly, refer to EM-240, "HOW TO SELECT PISTON" .

If replacing connecting rod assembly, refer to EM-251, "CON-
NECTING ROD BEARING OIL CLEARANCE" to select the
connecting rod bearing.
Factory installed parts grading:

Service parts apply only to grade “0”.
Unit: mm (in)
*: After installing in connecting rod
CYLINDER BLOCK DISTORTION

Using scraper, remove gasket on the cylinder block surface, and also remove engine oil, scale, carbon, or
other contamination.
CAUTION:
Be careful not to allow gasket flakes to enter engine oil or engine coolant passages.Standard : 21.989 - 22.001 mm (0.8657 - 0.8662 in)
PBIC0117E
Standard : 0.005 - 0.017 mm (0.0002 - 0.0007 in)
Limit : 0.030 mm (0.0012 in)
PBIC0809E
Grade 0 1
Connecting rod bushing
inner diameter * 22.000 - 22 .0 06
(0.8661 - 0.8664) 22.006 - 22.012
(0.8664 - 0.8666)
Piston pin hole diameter 21.993 - 21.999
(0.8659 - 0.8661) 21.999 - 22. 005
(0.8661 - 0.8663)
Piston pin outer diameter 21.989 - 21.995
(0.8657- 0.8659) 21.995 - 22.001
(0.8659 - 0.8662)
PBIC0812E

CYLINDER BLOCK
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Measure the distortion on the cylinder block upper face at some
different points in six directions with straightedge and feeler
gauge.

If it exceeds the limit, replace cylinder block.
MAIN BEARING HOUSING INNER DIAMETER

Install main bearing caps and main bearing beam (VQ35DE)
without installing main bearings, and tighten main bearing cap
bolts to the specified torque. Refer to EM-233, "
ASSEMBLY"
for the tightening procedure.

Measure the inner diameter of main bearing housing with bore
gauge.

If out of the standard, replace cylinder block and main bearing
caps as assembly.
NOTE:
Cylinder block cannot be replaced as a single part, because it is
machined together with main bearing caps.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter

Using bore gauge, measure cylinder bore for wear, out-of-round
and taper at six different points on each cylinder. (“X” and “Y”
directions at “A”, “B” and “C”) (“X” is in longitudinal direction of
engine)

If the measured value exceeds the limit, or if there are scratches
and/or seizure on the cylinder inner wall, hone or re-bore the
inner wall.

Oversize piston is provided. When using oversize piston, re-
bore cylinder so that the clearance of the piston-to-cylinder bore
satisfies the standard.
CAUTION:
When using an oversize piston, use over size pistons for all
cylinders with oversize piston rings.Limit : 0.1 mm (0.004 in)
SEM123C
Standard : 63.993 - 64.017 mm (2.5194 - 2.5203 in)
PBIC1643E
Standard inner diameter:
VQ23DE : 85.000 - 85.030 mm (3.3465 - 3.3476 in)
VQ35DE : 95.500 - 95.530 mm (3.7598 - 3.7610 in)
Wear limit : 0.2 mm (0.008 in)
Out-of-round (Difference between “X” and “Y”)
: 0.015 mm (0.0006 in)
Taper limit (Difference between “A” and “C”)
: 0.01 mm (0.0004 in)
Oversize (OS) : 0.2 mm (0.008 in)
PBIC0923E
SEM843E

SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00100
Standard and LimitBBS004WE
GENERAL SPECIFICATIONS
VA LV E T I M I N G
EngineVQ23DE VQ35DE
Cylinder arrangementV- 6
Displacement cm
3 (cu in)2,349 (143.34) 3,498 (213.45)
Bore and stroke mm (in)85.0 × 69.0
(3.346 × 2.717)95.5 × 81.4
(3.760 × 3.205)
Valve arrangementDOHC
Firing order1-2-3-4-5-6
Number of piston ringsCompression 2
Oil 1
Number of main bearings4
Compression ratio 9.8 10.3
Compression pressure
kPa (bar, kg/cm
2 , psi) / 300 rpmStandard 1,050 (10.5, 10.7, 152) 1,270 (12.7, 13.0, 184)
Minimum 750 (7.5, 7.7, 109) 980 (9.8, 10.0, 142)
Differential limit between cylinders 100 (1.0, 1.0, 15) 100 (1.0, 1.0, 15)
Cylinder number
SEM713A
Valve timing
(Intake valve timing control - “OFF”)
Unit: degree
abcde f
VQ23DE 232 230−757646
VQ35DE 240 238−664852
PBIC0187E

EM-260
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SERVICE DATA AND SPECIFICATIONS (SDS)

CYLINDER HEAD
Unit: mm (in)
Valve Dimensions
Unit: mm (in) Items Standard Limit
Head surface distortion 0.03 (0.0012) 0.1 (0.004)
Normal cylinder head height “H” 126.3 - 126.5 (4.972 - 4.980) —
PBIC0924E
Engine VQ23DE VQ35DE
Valve head diameter “D”Intake 34.0 - 34.3 (1.339 - 1.350) 37.0 - 37.3 (1.457 - 1.469)
Exhaust 29.0 - 29.3 (1.142 - 1.154) 31.2 - 31.5 (1.228 - 1.240)
Valve length “L”Intake 99.28 (3.909) 96.46 (37.99)
Exhaust 96.81 (38.11) 93.99 (37.00)
Valve stem diameter “d”Intake 5.965 - 5.980 (0.2348 - 0.2354)
Exhaust 5.955 - 5.970 (0.2344 - 0.2350)
Valve seat angle “α”Intake
45°15′ - 45°45′
Exhaust
Valve margin “T”Intake 1.1 (0.043)
Exhaust 1.3 (0.051)
Valve margin “T” wear limit 0.5 (0.020)
Valve stem end surface grinding limit 0.2 (0.008)
SEM188