|
Check con-rod bearing play with micrometer gauge
and internal measuring device
Note: Con-rod and
crankshaft are removed.
Install
| 1. |
Attach con-rod bearing cap to con-rod with con-rod bearing
shell 35 Nm + 45° + 15°
Note: The bolts can be
reused for checking the con-rod bearing play
|
Formula for calculating the average con-rod bearing
diameter:
|
I + II + III
|
|
|
3
|
|
Example:
|
|
I
|
42.738 mm
|
|
|
II
|
42.732 mm
|
|
|
III
|
+ 42.741 mm
|
|
|
|
128.211 mm
|
divided by 3 = 42.737 mm
|
The average con-rod bearing diameter is 42.737 mm
|
|
|
| 2. |
The con-rod bearing journal diameter is measured with a
micrometer at points I and II and then calculated
arithmetically.
|
Formula for calculating the average con-rod bearing journal
diameter:
|
I + II
|
|
|
2
|
|
|
|
Measure
| 3. |
The average con-rod bearing journal diameter is 42.727 mm. The
con-rod bearing play is calculated 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
|
- 42.727 mm
|
|
Calculated con-rod play
|
0.010 mm
|
Permissible con-rod bearing play: 0.006 to 0.031 mm.
|
|
