|
Check con-rod bearing clearance (with
micrometer)
Note: Con-rod and
crankshaft are removed
Measure
| 1. |
Attach con-rod bearing cap and con-rod bearing shell to
con-rod
Note: The screw
connection can be re-used to check the con-rod bearing
clearance
| • |
Tighten 2x nuts 25 Nm + 100° +
15°
|
|
| 2. |
Formula for calculating the average con-rod bearing
diameter:
|
Example:
|
|
|
|
|
I
|
42.738 mm
|
|
|
|
II
|
42.732 mm
|
|
|
|
III
|
42.741 mm
|
|
|
|
|
128.211 mm
|
divided by 3 =
|
42.737 mm
|
|
| 3. |
The average con-rod bearing diameter is 42.737 mm.
|
|
|
| 4. |
The con-rod bearing journal diameter is measured with a
micrometer gauge at points I and II and then determined by
calculation.
|
| 5. |
Formula for calculating the average con-rod bearing journal
diameter:
|
Example:
|
|
|
|
|
I
|
42.704 mm
|
|
|
|
II
|
42.708 mm
|
|
|
|
|
85.412 mm
|
divided by 2 =
|
42.706 mm
|
|
| 6. |
The average con-rod bearing journal diameter is 42.706 mm.
|
|
|
| 7. |
The con-rod bearing play is obtained from the difference in
diameter between the con-rod bearing bore and the con-rod bearing
journal.
|
Example:
|
|
|
Average con-rod bearing diameter
|
42.737 mm
|
|
Average con-rod bearing journal diameter
|
- 42.706 mm
|
|
|
0.031 mm
|
|
| 8. |
Permissible con-rod bearing clearance: 
|
|
