|
Check con-rod bearing clearance (with micrometer
gauge and internal measuring device)
Note: Con-rod and
crankshaft are removed.
Measure
Important: Measurement without
bearing shells.
|
| 1. |
Attach con-rod bearing cap without con-rod bearing shell to
con-rod
Note: When undertaking
the measurement it is not necessary to replace the bolts.
| • |
Tighten 2x bolt 20 Nm + 40°
|
|
| 2. |
The average con-rod big-end bearing diameter is calculated
using the measurements from points I, II and III (as measured with
an internal measuring device).
|
| 3. |
Formula for calculating the average con-rod bearing
diameter:
|
Example:
|
|
|
|
|
I
|
45.734 mm
|
|
|
|
II
|
45.738 mm
|
|
|
|
III
|
45.744 mm
|
|
|
|
|
137.216 mm
|
: 3 =
|
45.739 mm
|
|
| 4. |
The average con-rod big-end bearing diameter is 45.739 mm.
|
|
|
| 5. |
The con-rod bearing journal diameter is calculated using the
measurements from points I and II (as measured with a micrometer
gauge)
|
| 6. |
Formula for calculating the average con-rod bearing journal
diameter:
|
Example:
|
|
|
|
|
I
|
42.594 mm
|
|
|
|
II
|
42.596 mm
|
|
|
|
|
85.190 mm
|
: 2 =
|
42.595 mm
|
|
| 7. |
The average con-rod bearing journal diameter is 42.595 mm.
|
|
|
| 8. |
Con-rod bearing clearance is calculated using con-rod big-end
bore diameter, con-rod bearing journal diameter and con-rod bearing
shell thickness
|
Example:
|
|
|
Average con-rod big-end bearing diameter
|
45.739 mm
|
|
Average con-rod bearing journal diameter
|
- 42.595 mm
|
|
Clearance without bearing shells
|
3.144 mm
|
| |
|
|
Clearance without bearing shells
|
3.144 mm
|
|
2x con-rod bearing sheel (red) thickness
|
- 2x 1.549 mm
|
|
Con-rod bearing play
|
0.046 mm
|
|
| 9. |
Permissible con-rod bearing clearance: 0.030 - 0.062 mm
|
|
