|
Check the bearing clearance of the crankshaft (use
micrometer and internal measuring device)
Note: Crankshaft has
been removed.
Install
Important: Measure this without
the bearing shells.
|
| 1. |
Attach cylinder block base plate without crankshaft bearing
shells
Note: Note differing
bolts.
Important: Note tightening
order.
|
| • |
(I) Tighten 10 M10 bolts 20 Nm +
80°
Note: It is not
necessary to replace the bolts for the measuring procedure
|
| • |
(II) Tighten 10 M8 bolts 30 Nm
|
|
|
|
Measure
| 2. |
The mean crankshaft bearing diameter is determined by measuring
at points I, II and III and computing the result.
|
| 3. |
Formula for calculating the mean crankshaft bearing
diameter
|
Example:
|
|
|
|
|
I
|
54.711 mm
|
|
|
|
II
|
54.714 mm
|
|
|
|
III
|
54.712 mm
|
|
|
|
|
164.137 mm
|
: 3 =
|
54.712 mm
|
|
| 4. |
The mean crankshaft bearing diameter is 54.712 mm
|
|
|
| 5. |
The crankshaft bearing journal diameter is determined by
measuring at points I and II with a micrometer and computing the
mean.
|
| 6. |
Formula for calculating the mean crankshaft bearing journal
diameter:
|
Example:
|
|
|
|
|
I
|
50.994 mm
|
|
|
|
II
|
50.998 mm
|
|
|
|
|
101.992 mm
|
: 2 =
|
50.996 mm
|
|
| 7. |
The mean crankshaft bearing journal diameter is 50.996 mm
|
|
|
| 8. |
The crankshaft bearing clearance is calculated using the
difference between the crankshaft bearing bore and crankshaft
bearing journal diameters and the thickness of the crankshaft
bearing shells.
Note: Different classes
of crankshaft bearing shells can be used to give a smaller bearing
clearance. The thicker of the two shells must then be used in the
cylinder block base plate.
|
Example:
|
|
|
Mean crankshaft bearing diameter
|
54.712 mm
|
|
Mean crankshaft bearing journal diameter
|
- 50.996 mm
|
|
Clearance without bearing shells
|
3.716 mm
|
| |
|
|
Clearance without bearing shells
|
3.716 mm
|
|
Thickness of 1 cylinder block base plate crankshaft bearing
shell (blue)
|
- 1.843 mm
|
|
Thickness of 1 cylinder block base plate crankshaft bearing
shell (pink)
|
- 1.839 mm
|
|
Crankshaft bearing clearance
|
0.034 mm
|
|
| 9. |
Permissible crankshaft bearing clearance: 0.028 – 0.048 mm
|
 Remove
| 10. |
Detach cylinder block base plate
Note: Note differing
bolts
|
|
