2003 NISSAN X-TRAIL dimensions

EM-76
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CYLINDER HEAD

2. Ream cylinder head recess diameter for service valve seat.

Be sure to ream in circles concentric to the valve guide center.
This will enable valve seat to fit correctly.
3. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
4. Provide valve seats cooled well with dry ice. Press-fit valve seat into cylinder head.
CAUTION:

Avoid directly to 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 valve seat to the specified dimensions.
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 the cutter or cutting many different times
may result in stage valve seat.

Grind to obtain the dimensions indicated in the figure.
*1 : Diameter made by intersection point of conic angles 60 degrees and 89.5 degrees
*2 : Diameter made by intersection point of conic angles 89.5 degrees and 120 degrees
*3 : 120 degrees cutter diameter
6. Using compound, grind to adjust valve fitting. Oversize [0.5 mm (0.020 in)]
Intake : 37.000 - 37.016 mm (1.4567 - 1.4573 in)
Exhaust : 32.000 - 32.016 mm (1.2598 - 1.2605 in)
SEM795A
SEM008A
SEM934C
Standard
D1 dia.
: 33.5 mm (1.319 in)
*1
D2 dia.
: 35.1 - 35.3 mm (1.382 - 1.390 in)*2
D3 dia.
: 39.0 - 39.2 mm (1.535 - 1.543 in)*3
D4 dia.
: 28.0 mm (1.102 in)*1
D5 dia.
: 29.9 - 30.1 mm (1.177 - 1.185 in)*2
D6 dia.
: 33.5 - 33.7mm (1.319 - 1.327 in)*3SBIA0226E

CYLINDER HEAD
EM-77
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7. Check again for normal contact. Refer to EM-75, "VALVE SEAT CONTACT" .
VALVE SPRING SQUARENESS

Set try square along the side of valve spring and rotate the
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 pressure with valve spring seat installed at
specified spring height.
CAUTION:
Do not remove valve spring seat from valve spring.
Standard:

If the installation load or load with valve open is out of the standard, replace valve spring.Limit : 1.9 mm (0.075 in)
PBIC0080E
SEM113
Items INTAKE EXHAUST
Free height 44.84 - 45.34 mm (1.7654 - 1.7850 in) 45.28 - 45.78 mm (1.7827 - 1.8024 in)
Installation height 35.30 mm (1.390 in) 35.30 mm (1.390 in)
Installation load 151 - 175 N (15.4 - 17.8 kg, 34 - 39 lb) 151 - 175 N (15.4 - 17.8 kg, 34 - 39 lb)
Height during valve open 24.94 mm (0.9819 in) 26.39 mm (1.0390 in)
Load with valve open 358 - 408 N (36.5 - 41.6 kg, 80 - 92 lb) 325 - 371 N (33.1 - 37.8 kg, 73 - 83 lb)
Identification color Blue Yellow

CYLINDER BLOCK
EM-93
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The piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts,
no grades can be selected. (Only grade “0” is available.)
HOW TO SELECT CONNECTING ROD BEARING
When New Connecting Rod and Crankshaft are Used
1. Apply connecting rod big end diameter grade stamped on con-
necting rod side face to the row in the “Connecting Rod Bearing
Selection Table”.
2. Apply crankshaft pin journal diameter grade stamped on crank-
shaft front side to the column in the “Connecting Rod Bearing
Selection Table”.
3. Read the symbol at the cross point of selected row and column in the “Connecting Rod Bearing Selection
Table”.
4. Apply the symbol obtained to the “Connecting Rod Bearing Grade Table” to select connecting rod bearing.
When Crankshaft and Connecting Rod are Reused
1. Measure the dimensions of the connecting rod big end diameter and crankshaft pin journal diameter indi-
vidually. Refer to EM-101, "
CONNECTING ROD BIG END DIAMETER" and EM-105, "CRANKSHAFT
PIN JOURNAL DIAMETER" .
2. Apply the measured dimension to the “Connecting Rod Bearing Selection Table”.
3. Read the symbol at the cross point of selected row and column in the “Connecting Rod Bearing Selection
Table”.
4. Apply the symbol obtained to the “Connecting Rod Bearing Grade Table” to select connecting rod bearing.
PBIC2196E
PBIC2198E

CYLINDER BLOCK
EM-95
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CAUTION:
In grinding crankshaft pin to use undersize bearings, keep the
fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)].
Bearing undersize table
Unit: mm (in)
HOW TO SELECT MAIN BEARING
When New Cylinder Block and Crankshaft are Used
1. “Main Bearing Selection Table” rows correspond to main bearing
housing grade on rear left side of cylinder block.

If there is a corrected stamp mark on cylinder block, use it as
a correct reference.
2. Apply main journal diameter grade stamped on crankshaft front
side to column in the “Main Bearing Selection Table”.
3. Read the symbol at the cross point of selected row and column in the “Main Bearing Selection Table”.
CAUTION:
There are two main bearing selection tables. One is for odd-numbered journals (No. 1, 3 and 5) and
the other is for even-numbered journals (No. 2 and 4). Make certain to use the appropriate table.
This is due to differences in the specified clearances.
4. Apply the symbol obtained to the “Main Bearing Grade Table” to select main bearing.
NOTE:
Service part is available as a set of both upper and lower.
When Cylinder Block and Crankshaft are Reused
1. Measure the dimensions of the cylinder block main bearing housing inner diameter and crankshaft main
journal diameter individually. Refer to EM-103, "
MAIN BEARING HOUSING INNER DIAMETER" and EM-
104, "CRANKSHAFT MAIN JOURNAL DIAMETER" .
PBIC2200E
Size Thickness
US 0.25 (0.0098) 1.624 - 1.632 (0.0639 - 0.0643)
SBIA0283E
PBIC2198E

CYLINDER BLOCK
EM-105
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CRANKSHAFT PIN JOURNAL DIAMETER

Measure the outer diameter of crankshaft pin journal with a micrometer.

If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing.
Refer to EM-105, "
CONNECTING ROD BEARING OIL CLEARANCE" .
OUT-OF-ROUND AND TAPER OF CRANKSHAFT

Measure the dimensions at four different points as shown in the
figure on each main journal and pin journal with a micrometer.

Out-of-round is indicated by the difference in dimensions
between “X” and “Y” at “A” and “B”.

Taper is indicated by the difference in dimension between “A”
and “B” at “X” and “Y”.

If the measured value exceeds the limit, correct or replace crankshaft.

If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then
select main bearing and/or connecting rod bearing. Refer to EM-106, "
MAIN BEARING OIL CLEAR-
ANCE" and/or EM-105, "CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT RUNOUT

Place a V-block on a precise flat table to support the journals on
the both end of the crankshaft.

Place a dial gauge straight up on the No. 3 journal.

While rotating crankshaft, read the movement of the pointer on
the dial gauge. (Total indicator reading)

If it exceeds the limit, replace crankshaft.
CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation

Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the speci-
fied torque. Refer to EM-87, "
ASSEMBLY" for tightening procedure.

Measure the inner diameter of connecting rod bearing with an
inside micrometer.
(Bearing oil clearance) = (Connecting rod bearing inner diame-
ter) – (Crankshaft pin journal diameter)

If clearance exceeds the limit, select proper connecting rod
bearing according to connecting rod big end diameter and
crankshaft pin journal diameter to obtain specified bearing oil
clearance. Refer to EM-93, "
HOW TO SELECT CONNECTING
ROD BEARING" .
Method of Using Plastigage

Remove engine oil and dust on crankshaft pin and the surfaces of each bearing completely. Standard: 44.956 - 44.974 mm (1.7699-1.7706 in) dia.
Limit:
Out-of-round (Difference between “X” and “Y”)
: 0.005 mm (0.0002 in)
Taper (Difference between “A” and “B”)
: 0.005 mm (0.0002 in)
PBIC2203E
Limit:
QR20DE : 0.03 mm (0.0012 in)
QR25DE : 0.05 mm (0.0020 in)
PBIC0271E
Standard : 0.028 - 0.045 mm (0.0011 - 0.0018 in)
Limit : 0.10 mm (0.0039 in)
PBIC1642E

CYLINDER BLOCK
EM-107
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MAIN BEARING CRUSH HEIGHT

When lower cylinder block is removed after being tightened to
the specified torque with main bearings installed, the tip end of
bearing must protrude. Refer to EM-87, "
ASSEMBLY" for the
tightening procedure.

If the standard is not met, replace main bearings.
CONNECTING ROD BEARING CRUSH HEIGHT

When connecting rod bearing cap is removed after being tight-
ened to the specified torque with connecting rod bearings
installed, the tip end of bearing must protrude. Refer to EM-87,
"ASSEMBLY" for the tightening procedure.

If the standard is not met, replace connecting rod bearings.
LOWER CYLINDER BLOCK MOUNTING BOLT OUTER DIAMETER

Perform only with M10 bolts.

Measure the outer diameters (“d1 ”, “d2” ) at two positions as
shown in the figure.

If reduction appears in “A” range, regard it as “d2 ”.

If it exceeds the limit (a large difference in dimensions), replace
lower cylinder block mounting bolt with a new one.
CONNECTING ROD BOLT OUTER DIAMETER

Measure the outer diameter “d” at position as shown in the fig-
ure.

If reduction appears in a position other than “d”, regard it as “d”.

When “d ” exceeds the limit (when it becomes thinner), replace
connecting rod bolt with a new one.Standard: There must be crush height.
SEM502G
Standard : There must be crush height.
PBIC1646E
Limit (“d1 ” - “d2 ”) : 0.13 mm (0.0051 in)
PBIC0911E
Limit : 7.75 mm (0.3051 in)
PBIC0912E

EM-108
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CYLINDER BLOCK

FLYWHEEL DEFLECTION (M/T MODELS)

Measure the deflection of flywheel contact surface to clutch with
a dial gauge.

Measure the deflection at 210 mm (8.27 in) dia.

If measured value is out of the standard, replace flywheel.
CAUTION:
When measuring, keep magnetic fields (such as dial gauge
stand) away from signal plate of the rear end of crankshaft.
MOVEMENT AMOUNT OF FLYWHEEL (M/T MODELS)
CAUTION:
Do not disassemble double mass flywheel.
Movement Amount of Thrust (Fore-and-Aft) Direction

Measure the movement amount of thrust (fore-and-aft) direction when 100 N (10.2 kg, 22 lb) force is
added at the portion of 125 mm (4.92 in) radius from the center of flywheel.

If measured value is out of the standard, replace flywheel.
Movement Amount in Radial (Rotation) Direction
Check the movement amount of radial (rotation) direction with the following procedure:
1. Install a bolt to clutch cover mounting hole, and place a torque wrench on the extended line of the flywheel
center line.

Tighten bolt at a force of 9.8 N·m (1.0 kg-m, 87 in-lb) to keep it from loosening.
2. Put a mating mark on circumferences of the two flywheel
masses without applying any load (Measurement standard
points).
3. Apply a force of 9.8 N·m (1.0 kg-m, 87 in-lb) in each direction,
and mark the movement amount on the mass on the transaxle
side.
4. Measure the dimensions of movement amounts “A” and “B” on
circumference of the flywheel on the transaxle side.

If measured value is out of the standard, replace flywheel.Standard : 0.45 mm (0.0177 in) or less.
SBIA0287E
Standard : 1.3 mm (0.051 in) or less
Standard: 28.3 mm (1.114 in) or less.
PBIC1263E

EM-110
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SERVICE DATA AND SPECIFICATIONS (SDS)

VA LV E
Valve Timing
Unit: degree
( ): Valve timing control “ON”
Valve Dimensions
Unit: mm (in)
Valve Clearance
Unit: mm (in)
*: Approximately 20°C (68°F) Va l v e t i m i n g
Engine type a b c d e f
QR20DE 212 236 -4 (26) 60 (30)
329
QR25DE 224 244 0 (30) 64 (27) 41
PBIC0187E
Valve head diameter “D”Intake 35.5 - 35.8 (1.398 - 1.409)
Exhaust 30.5 - 30.8 (1.201 - 1.213)
Valve length “L”Intake 97.16 (3.8252)
Exhaust 98.82 (3.8905)
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)
SEM188A
Items Hot Cold* (reference data)
Intake 0.32 - 0.40 (0.013 - 0.016) 0.24 - 0.32 (0.009 - 0.013)
Exhaust 0.33 - 0.41 (0.013 - 0.016) 0.26 - 0.34 (0.010 - 0.013)