REPAIR valve gear. Fitting of valves to the saddles
To better fit the surface of the working bevel
to the surface of the valve seat chamfer nan must be made
grinding of these surfaces to each other using the tool.
Well-lapped each other facets
increase the compression in the cylinders of the engine and significantly
increase the service life of exhaust valves.
Lap the valves in the following order:
- Put the rod lapped valve spring;
- Apply a bevel head valve lapping thin layer of paste,
is prepared in a mixture of emery powder
oil to the engine;
- Insert the valve spring by pressure in the guide sleeve;
- Rotate the valve with the valve lapping prispoosobleniya
(Fig. 38) in both directions. At the same time to time
valve slightly pressed onto the seat.
Lap valves carefully without removing workers from the facets
valve seat is too much metal as it reduces the number of
repair of the valve seat and thereby reduces the overall
the duration of their service. By the end of grinding down the contents of
grinding the powder in the lapping paste, and the moment when the
surface will be completely smooth and even take xagrayish
color, grinding produce just one pure oil.
Outward sign of lapping is to obtain a satisfactory
odnotonnogog matte-gray color (no black spots) on the job
surfaces of the head glapana and his saddle.