Measuring a cylinder
WARNING: This page is about a different car, the 2022 BMW X7, 2021 BMW X7, 2020 BMW X7, and 2019 BMW X7. However, it is still accessible from the selected car via links, so may be relevant.
Precondition
Cylinder path is cleaned.
Check
- Adjusting measuring screw to nominal dimension of cylinder bore.
TECHNICAL DATA SPECIFICATION
| Cylinder bore | |
|---|---|
| Distance of the upper edge of the cylinder path to the measuring point | 0 mm... 60 mm |
| Diameter of cylinder bore | 82.000 mm... 82.014 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 60 mm... 80 mm |
| Diameter of cylinder bore | 82.008 mm... 82.022 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 80 mm... 115 mm |
| Diameter of cylinder bore | 82.021 mm... 82.037 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 115 mm... 135 mm |
| Diameter of cylinder bore | 82.033 mm... 82.057 mm |
| Permitted irregularity of the cylinder bore | 0.010 mm |
- Insert internal measuring device into micrometer and set to zero.
- With the internal measuring device, measure the cylinder at the following points and check the deviations from the nominal dimension.
- Lower third of the cylinder bore in direction of travel,
- Lower third of the cylinder bore transversely to direction of travel,
- Middle third of the cylinder bore in direction of travel,
- Middle third of the cylinder bore transversely to direction of travel,
- Upper third of the cylinder bore in direction of travel,
- Upper third of the cylinder bore transversely to direction of travel.
TECHNICAL DATA SPECIFICATION
| Cylinder bore | |
|---|---|
| Distance of the upper edge of the cylinder path to the measuring point | 0 mm... 60 mm |
| Diameter of cylinder bore | 82.000 mm... 82.014 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 60 mm... 80 mm |
| Diameter of cylinder bore | 82.008 mm... 82.022 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 80 mm... 115 mm |
| Diameter of cylinder bore | 82.021 mm... 82.037 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 115 mm... 135 mm |
| Diameter of cylinder bore | 82.033 mm... 82.057 mm |
| Permitted irregularity of the cylinder bore | 0.010 mm |
Result
» Cylinder does not correspond to the specifications.
Measure
- Replace crankcase.
Precondition
Cylinder path is cleaned.
Check
- Adjusting measuring screw to nominal dimension of cylinder bore.
TECHNICAL DATA SPECIFICATION
| Cylinder bore | |
|---|---|
| Distance of the upper edge of the cylinder path to the measuring point | 0 mm... 60 mm |
| Diameter of cylinder bore | 82.000 mm... 82.014 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 60 mm... 80 mm |
| Diameter of cylinder bore | 82.008 mm... 82.022 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 80 mm... 115 mm |
| Diameter of cylinder bore | 82.021 mm... 82.037 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 115 mm... 135 mm |
| Diameter of cylinder bore | 82.033 mm... 82.057 mm |
| Permitted irregularity of the cylinder bore | 0.010 mm |
- Insert internal measuring device into micrometer and set to zero.
- With the internal measuring device, measure the cylinder at the following points and check the deviations from the nominal dimension.
- Lower third of the cylinder bore in direction of travel,
- Lower third of the cylinder bore transversely to direction of travel,
- Middle third of the cylinder bore in direction of travel,
- Middle third of the cylinder bore transversely to direction of travel,
- Upper third of the cylinder bore in direction of travel,
- Upper third of the cylinder bore transversely to direction of travel.
TECHNICAL DATA SPECIFICATION
| Cylinder bore | |
|---|---|
| Distance of the upper edge of the cylinder path to the measuring point | 0 mm... 60 mm |
| Diameter of cylinder bore | 82.000 mm... 82.014 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 60 mm... 80 mm |
| Diameter of cylinder bore | 82.008 mm... 82.022 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 80 mm... 115 mm |
| Diameter of cylinder bore | 82.021 mm... 82.037 mm |
| Permitted irregularity of the cylinder bore | 0.007 mm |
| Distance of the upper edge of the cylinder path to the measuring point | 115 mm... 135 mm |
| Diameter of cylinder bore | 82.033 mm... 82.057 mm |
| Permitted irregularity of the cylinder bore | 0.010 mm |
Result
» Cylinder does not correspond to the specifications.
Measure
- Replace crankcase.