Nissan March K13. Manual — part 288
EM-86
< UNIT DISASSEMBLY AND ASSEMBLY >
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CYLINDER BLOCK
10. Oil ring
11.
Piston pin
12.
Piston
13. Connecting rod
14.
Connecting rod bearing (upper)
15.
Main bearing (upper)
16. Thrust bearing
17.
Crankshaft key
18.
Connecting rod bolt
19. Connecting rod cap
20.
Connecting rod bearing (lower)
21.
Main bearing (lower)
22. Crankshaft
23.
Pilot converter
24.
Rear oil seal
25. Drive plate
26.
Reinforcement plate
27.
Flywheel
A.
Tightening must be done following the
assembly procedure.
Refer to EM
B.
Chamfered
: Crankshaft side
HOW TO SELECT PISTON AND BEARING
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HOW TO SELECT PISTON AND BEARING
Description
INFOID:0000000005988217
• The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.
• For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table.
• For details of the measurement method of each part, the reuse standards and the selection method of the
selective fitting parts, refer to the text.
Connecting Rod Bearing
INFOID:0000000005988218
WHEN NEW CONNECTING ROD AND CRANKSHAFT ARE USED
1.
Apply connecting rod big end diameter grade stamped (C) on
connecting rod side face to the row in the “Connecting Rod
Bearing Selection Table”.
2.
Apply crankshaft pin journal diameter grade stamped (B) on
crankshaft front side to the column in the “Connecting Rod Bear-
ing Selection Table”.
3.
Read the symbol at the cross point of selected row and column in the “Connecting Rod Bearing Selection
Table”.
4.
Apply the symbol obtained to the “Connecting Rod Bearing Grade Table” to select connecting rod bearing.
WHEN CONNECTING ROD AND CRANKSHAFT ARE REUSED
1.
Measure the dimensions of the connecting rod big end diameter and crankshaft pin journal diameter indi-
vidually. Refer to EM.
Selection points
Selection parts
Selection items
Selection methods
Between cylinder block and
crankshaft
Main bearing
Main bearing grade (bearing
thickness)
Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)
Between crankshaft and con-
necting rod
Connecting rod bearing
Connecting rod bearing grade
(bearing thickness)
Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer di-
ameter determine connecting
rod bearing selection.
A
: Oil hole
B
: Cylinder number
D
: Front mark
PBIC3756E
A
: Main journal diameter grade (No. 1 to 5 from left)
B
: Crankshaft pin journal diameter grade (No. 1 to 4 from left)
PBIC3757E
EM-88
< UNIT DISASSEMBLY AND ASSEMBLY >
[HR12DE]
HOW TO SELECT PISTON AND BEARING
2.
Apply the measured dimension to the “Connecting Rod Bearing Selection Table”.
3.
Read the symbol at the cross point of selected row and column in the “Connecting Rod Bearing Selection
Table”.
4.
Apply the symbol obtained to the “Connecting Rod Bearing Grade Table” to select connecting rod bearing.
Connecting Rod Bearing Selection Table
Connecting Rod Bearing Grade Table
Undersize Bearings Usage Guide
• When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod
bearings, use undersize (US) bearings.
• When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing
installed, and grind the crankshaft pin so that the connecting rod bearing oil clearance satisfies the standard.
CAUTION:
PBIC3758E
Connecting Rod Bearing Grade Table
: Refer to
HOW TO SELECT PISTON AND BEARING
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In grinding crankshaft pin to use undersize bearings, keep the
fillet R (A) [0.8 - 1.2 mm (0.031 - 0.047 in)].
Main Bearing
INFOID:0000000005988219
HOW TO SELECT MAIN BEARING
When New Cylinder Block and Crankshaft Are Used
1.
“Main Bearing Selection Table” rows correspond to main bearing
housing grade on left side of cylinder block.
• If there is a corrected stamp mark (B) on cylinder block, use it
as a correct reference.
2.
Apply main journal diameter grade stamped on crankshaft front
side to column in the “Main Bearing Selection Table”.
3.
Read the symbol at the cross point of selected row and column in the “Main Bearing Selection Table”.
4.
Apply the symbol obtained to the “Main Bearing Grade Table” to select main bearing.
NOTE:
Service part is available as a set of both upper and lower.
When Cylinder Block and Crankshaft Are Reused
1.
Measure the dimensions of the cylinder block main bearing housing inner diameter and crankshaft main
journal diameter individually. Refer to EM.
2.
Apply the measured dimension to the “Main Bearing Selection Table”.
3.
Read the symbol at the cross point of selected row and column in the “Main Bearing Selection Table”.
4.
Apply the symbol obtained to the “Main Bearing Grade Table” to select main bearing.
Bearing undersize table:
Refer to
EM-100, "Connecting Rod Bearing"
.
PBIC3263J
A
: Basic stamp mark
: Engine front
PBIC3760E
A
: Main journal diameter grade (No. 1 to 5 from left)
B
: Crankshaft pin journal diameter grade (No. 1 to 4 from left)
PBIC3757E
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