User Manual - Page 140

For 2004 INFINITI FX45.

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EM-140
[VQ35DE]
CYLINDER BLOCK
Revision: 2004 November 2004 FX35/FX45
Measure the distortion on the block upper face at some different
points in 6 directions.
If out of the distortion limit, replace cylinder block.
MAIN BEARING HOUSING INNER DIAMETER
Install main bearing caps and main bearing beam with main
bearings removed, and tighten mounting bolts to the specified
torque. Refer to EM-126, "
ASSEMBLY" for the tightening proce-
dure.
Using a bore gauge, measure the inner diameter of the main
bearing housing.
If out of the standard, replace cylinder block and main bearing
caps as assembly.
NOTE:
Cylinder block cannot be replaced as single part, because it is
machined together with main bearing caps.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter
Using a bore gauge, measure cylinder bore for wear, out-of-
round and taper at 6 different points on each cylinder. (“X” and
“Y” directions at “A”, “B” and “C”) (“Y” 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.
An oversize piston is provided. When using an oversize piston,
re-bore cylinder so that the clearance of the piston-to-cylinder
bore satisfies the standard.
CAUTION:
When using oversize piston, use it for all cylinders with
oversize piston rings.
When using an oversize piston, use it for all cylinders with over-
size piston rings.
Limit : 0.10 mm (0.0039 in)
SEM123C
Standard : 63.993 - 64.017 mm (2.5194 - 2.5203 in)
PBIC1643E
Standard inner diameter:
95.500 - 95.530 mm (3.7598 - 3.7610 in)
Wear limit:
0.20 mm (0.0079 in)
Out-of-round (Difference between “X” and “Y”):
Limit: 0.015 mm (0.0006 in)
Taper (Difference between “A” and “C”):
Limit: 0.010 mm (0.0004 in)
Oversize (Service) : 0.20 mm (0.0079 in)
PBIC0923E
SEM843E
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