Pistons And Cylinder Bore, Checking
Special tools and workshop equipment required
- Outside Micrometer - 75-100 mm :VAS6071
-- Measure approximately 15 mm in from the lower edge at a 90° angle to the piston pin axis using a micrometer.
- Deviation from specified size: maximum 0.04 mm
| Standard Dimension | Piston Diameter | |
|---|---|---|
| in mm | 82.42 1) | |
|
||
Special tools and workshop equipment required
- Feeler Gauge
-- Push piston ring squarely from above down to approximately 15 mm from bottom end of cylinder. To push in use a piston without rings.
| Piston Ring Dimensions in mm | New | Wear Limit |
|---|---|---|
| 1. Compression ring | 0.30 to 0.40 | 0.80 |
| 2. Compression ring | 0.40 to 0.50 | 0.80 |
| Oil Scraping Ring | 0.20 to 0.40 | 0.80 |
Special tools and workshop equipment required
- Feeler Gauge
-- Clean the piston ring groove before checking.
| Piston Ring Dimensions in mm | New | Wear Limit |
|---|---|---|
| 1. Compression ring | 0.06 to 0.09 | 0.20 |
| 2. Compression ring | 0.03 to 0.06 | 0.15 |
| Oil scraping rings | cannot be measured |
Special tools and workshop equipment required
- Cylinder Dial Bore Gauge :VAS6078
Risk of damaging the cylinder bore surface through incorrect handling.
Never handle the cylinder bore with service equipment (drilling, honing, grinding).
-- Using a :VAS6078 measure in a diagonal sequence at three positions transversely -A- and longitudinally -B-.
- Deviation from specified size: maximum 0.08 mm
| Standard Dimension | Cylinder Bore Diameter |
|---|---|
| in mm | 82.51 |
The cylinder bore must not be measured when the cylinder block is mounted on the :VAS6095 because the measurements may be incorrect.