2006 INFINITI FX35 Service Manual

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Page 2937 of 4462

INFINITI FX35 2006 Service Manual CYLINDER BLOCK EM-143
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Revision: 2006 December 2006 FX35/FX45
CONNECTING ROD BEND AND TORSION
Check with a connecting rod aligner.
If it exceeds the li

Page 2938 of 4462

INFINITI FX35 2006 Service Manual EM-144
[VQ35DE]
CYLINDER BLOCK
Revision: 2006 December 2006 FX35/FX45
Piston Pin Outer Diameter
Measure the outer diameter of piston pin with a micrometer.
Connecting Rod Bushing Oil Clearance
(Connec

Page 2939 of 4462

INFINITI FX35 2006 Service Manual CYLINDER BLOCK EM-145
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Revision: 2006 December 2006 FX35/FX45
Measure the distortion on the cylinder block upper face at some
different points in six d

Page 2940 of 4462

INFINITI FX35 2006 Service Manual EM-146
[VQ35DE]
CYLINDER BLOCK
Revision: 2006 December 2006 FX35/FX45
Piston Skirt Diameter
Measure the outer diameter of piston skirt with a micrometer.
Piston-to-Cylinder Bore Clearance
Calculate by

Page 2941 of 4462

INFINITI FX35 2006 Service Manual CYLINDER BLOCK EM-147
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Revision: 2006 December 2006 FX35/FX45
CRANKSHAFT PIN JOURNAL DIAMETER
Measure the outer diameter of crankshaft pin journal with

CYLINDER BLOCK EM-147
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Revision: 2006 December 2006 FX35/FX45
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-147,
"CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT OUT-OF-ROUND AND TAPER
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 the dimensions
between “X” and “Y” at “A” and “B”.
Taper is indicated by the difference in the dimensions 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 the main bearing and/or connecting rod bearing. Refer to EM-148, "
MAIN BEARING OIL CLEAR-
ANCE" and/or EM-147, "CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT RUNOUT
Place V-block on precise flat table, and support the journals on
the both end of crankshaft.
Place a dial indicator straight up on the No. 3 journal.
While rotating crankshaft, read the movement of the pointer on a
dial indicator. (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 connect-
ing rod cap, and tighten connecting rod bolts to the specified
torque. Refer to EM-129, "
ASSEMBLY" for the tightening proce-
dure.
Measure the inner diameter of connecting rod bearing with an
inside micrometer.
(Oil clearance) = (Connecting rod bearing inner diameter) – (Crank-
shaft pin journal diameter) Standard : 51.956 - 51.974 mm (2.0455 - 2.0462 in) dia.
PBIC0127E
Limit:
Out-of-round (Difference between “X” and “Y”) : 0.002 mm (0.0001 in)
Taper (Difference between “A” and “B”) : 0.002 mm (0.0001 in)
SBIA0535E
Standard : Less than 0.05 mm (0.0020 in)
Limit : 0.10 mm (0.0039 in)
SEM346D
PBIC1642E

Page 2942 of 4462

INFINITI FX35 2006 Service Manual EM-148
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CYLINDER BLOCK
Revision: 2006 December 2006 FX35/FX45
If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod
big end diameter and

EM-148
[VQ35DE]
CYLINDER BLOCK
Revision: 2006 December 2006 FX35/FX45
If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod
big end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance. Refer
to EM-137, "
HOW TO SELECT CONNECTING ROD BEARING" .
Method of Using Plastigage
Remove oil and dust on crankshaft pin 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 connecting rod bearings to connecting rod and connecting rod bearing cap, and tighten connecting
rod bolts to the specified torque. Refer to EM-129, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.
Remove connecting rod bearing cap 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”.
MAIN BEARING OIL CLEARANCE
Method by Calculation
Install main bearings to cylinder block and main bearing caps,
and tighten main bearing cap bolts with main bearing beam to
the specified torque. Refer to EM-129, "
ASSEMBLY" for the
tightening procedure.
Measure the inner diameter of main bearing with a bore gauge.
(Oil clearance) = (Main bearing inner diameter) – (Crankshaft main
journal diameter)
If the calculated value exceeds the limit, select proper main bearing according to main bearing inner diam-
eter and crankshaft main journal diameter to obtain the specified bearing oil clearance. Refer to EM-138,
"HOW TO SELECT MAIN BEARING" .
Method of Using Plastigage
Remove engine oil and dust on crankshaft 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 bearing to cylinder block and main bearing cap, and tighten main bearing bolts with main
bearing beam to the specified torque. Refer to EM-129, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Never rotate crankshaft. Standard : 0.034 - 0.059 mm (0.0013 - 0.0023 in)
(actual clearance)
Limit : 0.070 mm (0.0028 in)
PBIC1149E
Standard : 0.035 - 0.045 mm (0.0014 - 0.0018 in) (actual clearance)
Limit : 0.065 mm (0.0026 in)
PBIC1644E

Page 2943 of 4462

INFINITI FX35 2006 Service Manual CYLINDER BLOCK EM-149
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Revision: 2006 December 2006 FX35/FX45
Remove main bearing caps and bearings, and using the scale
on the plastigage bag, measure

Page 2944 of 4462

INFINITI FX35 2006 Service Manual EM-150
[VQ35DE]
CYLINDER BLOCK
Revision: 2006 December 2006 FX35/FX45
CONNECTING ROD BOLT OUTER DIAMETER
Measure the outer diameter “d” at position shown in the figure.
If the reduction appears

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