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Figure 4.36. Pistons and connecting rods: 1 - Piston rings; 2 - Retaining ring; 3 - Piston; 4 Upper connecting rod bushing; 5 - Connecting rod; 6 Oil can; 7.9 - Bolts; 8 - Sealing washers; 10 - Spring fingers; 11 - Inserts; 12 - Cylinder block; 13 - Piston pin.
Figure 4.37a. Checking the piston ring thermal clearance.
Figure 4.37b. Checking the piston ring clearance by height.
Table 4.5. Piston and piston ring clearance dimensions
The original text can be found at: VWmanual
| Parameters | Cylinder diameter | |
| Main diameter, mm | 93.000-93.022 | |
| Permissible wear | 93.082 | |
| Parameters | New ring | Permissible wear |
| Piston ring thermal clearance | ||
| Upper compression ring, mm | 0.30-0.55 | 1.0 |
| Lower compression ring, mm | 0.30-0.55 | |
| Oil scraper ring, mm | 0.30-0.50 | |
| Piston ring height clearance | ||
| Upper compression ring, mm | 0.085-0.090 | - |
| Lower compression ring, mm | 0.070-0.105 | - |
| Oil scraper ring, mm | 0.030-0.065 | - |
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