- valve grinding tool
- lapping paste
Remove the oil seals (see subsection 10.4.3.). Clean the valves and seats thoroughly.
Valve grinding tool
If you don't have a special device, you can use a device made according to this sketch:
1 – metal rod
2 – rubber hose
3 – screw clamps
To check the tightness of the valve, install it in the head with springs and crackers. Then turn the head over and pour kerosene into the combustion chamber corresponding to the valve being checked. If kerosene does not leak out of the combustion chamber within three minutes, the valve is tight.
1. Insert the valve into the cylinder head and...
2....apply a thin layer of lapping paste to the working chamfer of the valve.
[The original is on the portal vazbook]
3. Clamp the valve stem in the fixture (or secure the rubber hose of the device to the valve stem with a clamp).
4. Turn the valve in both directions using the device, periodically pressing the valve against the seat.
5. An external sign of satisfactory lapping is a uniform matte gray color of the working chamfer of the valve and seat.
6. After lapping, wipe the valve thoroughly and...
7....the seat with a clean cloth and rinse to remove any remaining lapping paste.