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EM-260
[VK45DE]
CYLINDER BLOCK
Revision: 2004 November 2004 FX35/FX45
● 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 without install-
ing main bearings, and tighten main bearing cap bolts to the
specified torque. Refer to EM-244, "
ASSEMBLY" for the tight-
ening 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 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”) (“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.
● 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 oversize piston, use it for all cylinders with
oversize piston rings.
Limit : 0.1 mm (0.004 in)
SEM123C
Standard : 68.944 - 68.968 mm (2.7143 - 2.7153 in)
PBIC1643E
Standard inner diameter:
93.000 - 93.030 mm (3.6614 - 3.6626 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)
PBIC0123E
PBIC0124E
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