Note. We perform valve grinding on the removed cylinder head (see "Cylinder head - removal and installation").
To grind valves, you must have:
- valve grinding tool;
- rubbing paste.
Removing
1. Remove the valve stem seal (see "Oil seals - replacement").
2. Remove the valve from the guide sleeve.
Lapping of valves
3. Apply lapping paste to the working edge of the valve.
4. We install the valve in the cylinder head and fix the lapping tool on its stem.
5. Pressing the valve against the seat, turn it from side to side. After 10-15 strokes turn the valve 90°and continue lapping.
6. Lapping of the valve is carried out until a uniform annular belt is formed on the valve disc.
7. Lapping of the valve is carried out until a uniform annular belt is formed on the seat.
Installation
We remove the remnants of lapping paste from the valve and its seat. We install the valve in place and all the removed parts in the reverse order of removal.
We grind the rest of the valves in the same way.