Infiniti G37 Coupe. Manual - part 640
HOW TO SELECT PISTON AND BEARING
EM-135
< DISASSEMBLY AND ASSEMBLY >
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D
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Main Bearing
INFOID:0000000001547571
WHEN NEW CYLINDER BLOCK AND CRANKSHAFT ARE USED
1.
“MAIN BEARING SELECTION TABLE” rows correspond to
bearing housing grade on rear side of cylinder block.
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 SELEC-
TION TABLE”.
4.
Apply sign at crossing in above step 3 to “MAIN BEARING GRADE TABLE”.
NOTE:
• “MAIN BEARING GRADE TABLE” applies to all journals.
• Service parts are available as a set of both upper and lower.
WHEN CYLINDER BLOCK AND CRANKSHAFT ARE REUSED
1.
Measure cylinder block main bearing housing inner diameter and crankshaft main journal diameter. Refer
to
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.
Follow step 3 and later in “When New Cylinder Block and Crankshaft are Used”.
Bearing undersize table
: Refer to
EM-148, "Connecting Rod Bearing"
.
A
: Bearing housing grade No. 1
B
: Bearing housing grade No. 2
C
: Bearing housing grade No. 3
D
: Bearing housing grade No. 4
E
: Cylinder bore grade No. 1
F
: Cylinder bore grade No. 2
G
: Cylinder bore grade No. 3
H
: Cylinder bore grade No. 4
I
: Cylinder bore grade No. 5
J
: Cylinder bore grade No. 6
K
: Identification code
: Engine front
JPBIA0268ZZ
A
: Journal diameter grade No. 1
B
: Journal diameter grade No. 2
C
: Journal diameter grade No. 3
D
: Journal diameter grade No. 4
E
: Pin diameter grade No. 1
F
: Pin diameter grade No. 2
G
: Pin diameter grade No. 3
H
: Pin diameter grade No. 4
I
: Pin diameter grade No. 5
J
: Pin diameter grade No. 6
K
: Identification code
JPBIA0269ZZ