Measuring a cylinder
Prerequisite
Cylinder path is cleaned.
Check
- Perform measurement on all cylinders.
- Adjusting measuring screw to nominal dimension of cylinder bore.
TECHNICAL DATA - CYLINDER BORE SPECIFICATION
| Cylinder bore B36/B38/B42/B46/B48/B58 | |
|---|---|
| Diameter of cylinder bore | |
| 82.000 mm... 82.014 mm |
|
| Permitted irregularity of the cylinder bore | |
| 0.01 mm | |
| Permitted conicity of the cylinder bore | |
| 0.01 mm | |
| Permissible total wear tolerance between piston and cylinder bore (engine operated) | |
| 0.15 mm | |
- Insert the internal measuring device into the micrometer and set it to zero.
- Measure the cylinder with the internal measuring device at the following points and check the deviations from the nominal dimension.
- Lower third of the cylinder bore in the driving direction
- Lower third of the cylinder bore transversely to the driving direction
- Middle third of the cylinder bore in the driving direction
- Middle third of the cylinder bore transversely to the driving direction
- Upper third of the cylinder bore in the driving direction
- Upper third of the cylinder bore transversely to the driving direction
Result
» Cylinder does not correspond to the specifications.
Measure
- Replace crankcase.
Parts: Crankcase