Execution order
1. Any valve seat insert that has worn to the limit must be replaced at room temperature by cutting off the wall as shown in Figure A.
2. After removing the old valve seat, it is necessary to ream out the seat to accommodate the increased valve seat size.
3. Heat the cylinder head to 250°C and press in a new valve seat of the repair size. When pressing in, the valve seat must be at room temperature. After installing the new valve seat, grind in the valve.
Description | Size increase, mm | Size label | Saddle height, mm | Cylinder head socket diameter, mm |
| Intake valve seat | 0,3 | 30 | 5,1–5,3 | 28,80–28,821 |
0,6 | 60 | 5,4–5,6 | 29,10–29,121 | |
| Exhaust valve seat | 0,3 | 30 | 5,9–6,1 | 34,30–34,325 |
0,6 | 60 | 6,2–6,4 | 34,60–34,625 |