Polo Mk4
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| Measure | Intake valve seat | ||
| Ø a | mm | 39,2 | |
| b | mm | maximum reworking measure admissible | |
| c | mm | 1,8... 2,2 | |
| Z | lower edge of engine cylinder head | ||
| 45° | valve seating angle | ||
| 30° | upper correction angle | ||
Volkswagen Workshop Service and Repair Manuals
Grind exhaust valve seat >
< Calculate the maximum admissible grinding elevation as follows:
Grind intake valve seats