Procedures

REPAIR





1. REPAIR INTAKE VALVE SEAT

NOTICE: Keep the lip free from foreign matter.

(a) If the seating is too high on the valve face, use 30° and 45° cutters to correct the seat.





(b) If the seating is too low on the valve face, use 60° and 45° cutters to correct the seat.
(c) Hand-lap the valve and valve seat with an abrasive compound.
(d) Check the valve seating position.
2. REPAIR EXHAUST VALVE SEAT

NOTICE: Keep the lip free from foreign matter.





(a) If the seating is too high on the valve face, use 30° and 45° cutters to correct the seat.





(b) If the seating is too low on the valve face, use 45° and 75° cutters to correct the seat.
(c) Hand-lap the valve and valve seat with an abrasive compound.
(d) Check the valve seating position.