2003 NISSAN X-TRAIL Service Repair Manual

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Page 153 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual CYLINDER BLOCK
EM-101
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CONNECTING ROD BEND AND TORSION
Check with a connecting rod aligner.
If it exceeds the limit, replace connecting rod assembly.
CONNECTING ROD B

Page 154 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EM-102
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Piston Pin Outer Diameter
Measure the outer diameter of piston pin with a micrometer.
Connecting Rod Bushing Oil Clearance
(Connecting rod bushing oil clearance) = (Connec

Page 155 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual CYLINDER BLOCK
EM-103
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Measure the distortion on the cylinder block upper face at some
different points in six directions with a straight edge and feeler
gauge.
If it

Page 156 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EM-104
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Piston Skirt Diameter
Measure the outer diameter of piston skirt with a micrometer.
Piston to Cylinder Bore Clearance
Calculate by piston skirt diameter and cylinder bore

Page 157 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual 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 co

CYLINDER BLOCK
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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

Page 158 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EM-106
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Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.
Install connecting rod bearings to connecting r

EM-106
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Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.
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 the tightening procedure.
CAUTION:
Do not rotate crankshaft.
Remove connecting rod cap and bearing, and using the scale on
the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
MAIN BEARING OIL CLEARANCE
Method by Calculation
Install main bearings to cylinder block and lower cylinder block, and tighten lower cylinder block mounting
bolts to the specified torque. Refer to EM-87, "
ASSEMBLY" for the tightening procedure.
Measure the inner diameter of main bearing with a bore gauge.
(Bearing oil clearance) = (Main bearing inner diameter) – (Crank-
shaft main journal diameter)
If clearance exceeds the limit, select proper main bearing
according to main bearing inner diameter and crankshaft main journal diameter to obtain specified bearing
oil clearance. Refer to EM-95, "
HOW TO SELECT MAIN BEARING" .
Method of Using Plastigage
Remove engine oil and dust on crankshaft main journal and the surfaces of each bearing completely.
Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.
Install main bearings to cylinder block and lower cylinder block, and tighten lower cylinder block mounting
bolts to the specified torque. Refer to EM-87, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.
Remove lower cylinder block and bearings, and using the scale
on the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
PBIC1149E
Standard:
No. 1, 3 and 5 journals
: 0.012 - 0.022 mm (0.0005 - 0.0009 in)
No. 2 and 4 journals
: 0.018 - 0.028 mm (0.0007 - 0.0011 in)
Limit : 0.1 mm (0.004 in)
PBIC2204E
PBIC1149E

Page 159 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual 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

Page 160 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EM-108
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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 meas

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