Measuring all pistons
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.
NOTE:
The description is provided only at one component. The procedure is the same for all other components.
Measuring piston
Check
- Position micrometer in area (A) and measure piston installation clearance transversely to piston pin.
TECHNICAL DATA SPECIFICATION
| Piston diameter | ||
|---|---|---|
| Measure the piston diameter at distance (A) from the lower end of the piston skirt. | Distance (A) to the lower end of the piston skirt | 14 mm |
| Nominal dimension of piston diameter | 81.938 mm... 81.956 mm | |
| Distance (A) to the lower end of the piston skirt | 26 mm | |
| Nominal dimension of piston diameter | 81.884 mm... 81.87 mm | |
| Distance (A) to the lower end of the piston skirt | 49 mm | |
| Nominal dimension of piston diameter | 81.285 mm... 81.309 mm | |
Result
» Piston does not correspond to the specifications.
Measure
- Replace the piston.
NOTE:
The description is provided only at one component. The procedure is the same for all other components.
Measuring piston
Check
- Position micrometer in area (A) and measure piston installation clearance transversely to piston pin.
TECHNICAL DATA SPECIFICATION
| Piston diameter | ||
|---|---|---|
| Measure the piston diameter at distance (A) from the lower end of the piston skirt. | Distance (A) to the lower end of the piston skirt | 14 mm |
| Nominal dimension of piston diameter | 81.938 mm... 81.956 mm | |
| Distance (A) to the lower end of the piston skirt | 26 mm | |
| Nominal dimension of piston diameter | 81.884 mm... 81.87 mm | |
| Distance (A) to the lower end of the piston skirt | 49 mm | |
| Nominal dimension of piston diameter | 81.285 mm... 81.309 mm | |
Result
» Piston does not correspond to the specifications.
Measure
- Replace the piston.