Infiniti FX35 / FX45. Manual — part 655
CYLINDER BLOCK
EM-137
< SERVICE INFORMATION >
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2.
“Main Bearing Selection Table” columns correspond to journal
diameter grade on front side of crankshaft.
3.
Select main bearing grade at the point where selected row and column meet in “Main Bearing Selection
Table”.
When Cylinder Block and Crankshaft are Reused
1.
Measure cylinder block main bearing housing inner diameter and crankshaft main journal diameter. Refer
to
EM-138, "Inspection After Disassembly"
EM-138, "Inspection After Disassembly"
.
2.
Correspond the measured dimension in “Cylinder block main bearing housing inner diameter” row of
“Main Bearing Selection Table”.
3.
Correspond the measured dimension in “Crankshaft main journal diameter” column of “Main Bearing
Selection Table”.
4.
Select main bearing grade at the point where selected row and column meet in following selection table.
Main Bearing Selection Table
SEM452G
PBIC1981E
EM-138
< SERVICE INFORMATION >
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CYLINDER BLOCK
Main Bearing Grade Table (All Journals)
Unit: mm (in)
Undersize Bearing Usage Guide
• When the specified main bearing oil clearance is not obtained with standard size main bearings, use under-
side (US) bearing.
• When using undersize (US) bearing, measure the main bearing inner diameter with bearing installed, and
grind main journal so that the main bearing oil clearance satisfies the standard.
CAUTION:
In grinding crankshaft main journal to use undersize bearings,
keep the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)].
Bearing undersize table
Unit: mm (in)
Inspection After Disassembly
INFOID:0000000001325749
CRANKSHAFT END PLAY
Grade number
Thickness
Width
Identification color
Remarks
0
2.000 - 2.003 (0.0787 - 0.0789)
19.9 - 20.1
(0.783 - 0.791)
Black
Grade and color are
the same for upper and
lower bearings.
1
2.003 - 2.006 (0.0789 - 0.0790)
Brown
2
2.006 - 2.009 (0.0790 - 0.0791)
Green
3
2.009 - 2.012 (0.0791 - 0.0792)
Yellow
4
2.012 - 2.015 (0.0792 - 0.0793)
Blue
5
2.015 - 2.018 (0.0793 - 0.0794)
Pink
6
2.018 - 2.021 (0.0794 - 0.0796)
Purple
7
2.021 - 2.024 (0.0796 - 0.0797)
White
01
UPR
2.003 - 2.006 (0.0789 - 0.0790)
Brown
Grade and color are
different for upper and
lower bearings.
LWR
2.000 - 2.003 (0.0787 - 0.0789)
Black
12
UPR
2.006 - 2.009 (0.0790 - 0.0791)
Green
LWR
2.003 - 2.006 (0.0789 - 0.0790)
Brown
23
UPR
2.009 - 2.012 (0.0791 - 0.0792)
Yellow
LWR
2.006 - 2.009 (0.0790 - 0.0791)
Green
34
UPR
2.012 - 2.015 (0.0792 - 0.0793)
Blue
LWR
2.009 - 2.012 (0.0791 - 0.0792)
Yellow
45
UPR
2.015 - 2.018 (0.0793 - 0.0794)
Pink
LWR
2.012 - 2.015 (0.0792 - 0.0793)
Blue
56
UPR
2.018 - 2.021 (0.0794 - 0.0796)
Purple
LWR
2.015 - 2.018 (0.0793 - 0.0794)
Pink
67
UPR
2.021 - 2.024 (0.0796 - 0.0797)
White
LWR
2.018 - 2.021 (0.0794 - 0.0796)
Purple
PBIC1908E
Size
Thickness
US 0.25 (0.0098)
2.132 - 2.140 (0.0839 - 0.0843)
CYLINDER BLOCK
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• Measure the clearance between thrust bearings and crankshaft
arm when crankshaft is moved fully forward or backward with a dial
indicator.
• If the measured value exceeds the limit, replace thrust bearings,
and measure again. If it still exceeds the limit, replace crankshaft
also.
CONNECTING ROD SIDE CLEARANCE
• Measure the side clearance between connecting rod and crank-
shaft arm with a feeler gauge.
• If the measured value exceeds the limit, replace connecting rod,
and measure again. If it still exceeds the limit, replace crankshaft
also.
PISTON TO PISTON PIN OIL CLEARANCE
Piston Pin Hole Diameter
Measure the inner diameter of piston pin hole with an inside
micrometer.
Piston Pin Outer Diameter
Measure the outer diameter of piston pin with a micrometer.
Piston to Piston Pin Oil Clearance
(Piston to piston pin oil clearance) = (Piston pin hole diameter) – (Piston pin outer diameter)
• If the calculated value is out of the standard, replace piston and piston pin assembly.
• When replacing piston and piston pin assembly, refer to
EM-134, "How to Select Piston and Bearing"
.
NOTE:
• Piston is available together with piston pin as assembly.
Standard
: 0.10 - 0.25 mm (0.0039 - 0.0098 in)
Limit
: 0.30 mm (0.0118 in)
EMQ0196D
Standard
: 0.20 - 0.35 mm (0.008 - 0.014 in)
Limit
: 0.40 mm (0.016 in)
PBIC0815E
Standard
: 21.993 - 22.005 mm (0.8659 - 0.8663 in)
PBIC0116E
Standard
: 21.989 - 22.001 mm (0.8657 - 0.8662 in)
PBIC0117E
Standard
: 0.002 - 0.006 mm (0.0001 - 0.0002 in)
EM-140
< SERVICE INFORMATION >
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CYLINDER BLOCK
• Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no
piston pin grades can be selected. (Only “0” grade is available.)
PISTON RING SIDE CLEARANCE
• Measure the side clearance of piston ring and piston ring groove
with a feeler gauge.
• If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
replace piston also.
PISTON RING END GAP
• Make sure that the cylinder bore inner diameter is within the speci-
fication. Refer to "Cylinder Bore inner Diameter ".
• Lubricate with new engine oil to piston and piston ring, and then
insert piston ring until middle of cylinder with piston, and measure
the piston ring end gap with a feeler gauge.
• If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
re-bore cylinder and use oversize piston and piston rings.
CONNECTING ROD BEND AND TORSION
Standard:
Top ring
: 0.045 - 0.080 mm (0.002 - 0.003 in)
2nd ring
: 0.030 - 0.070 mm (0.001 - 0.003 in)
Oil ring
: 0.065 - 0.135 mm (0.003 - 0.005 in)
Limit:
Top ring
: 0.11 mm (0.004 in)
2nd ring
: 0.10 mm (0.004 in)
SEM024AA
Standard:
Top ring
: 0.23 - 0.33 mm (0.009 - 0.013 in)
2nd ring
: 0.33 - 0.48 mm (0.013 - 0.019 in)
Oil ring
: 0.20 - 0.50 mm (0.008 - 0.020 in)
Limit:
Top ring
: 0.54 mm (0.021 in)
2nd ring
: 0.80 mm (0.031 in)
Oil ring
: 0.95 mm (0.037 in)
PBIC0118E
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