Procedures

3MZ-FE ENGINE MECHANICAL: CYLINDER HEAD: REPAIR

REPAIR

1. REPAIR VALVE SEATS
NOTE: Releasing the seat-cutter pressure gradually helps to make smoother valve seat faces.





(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 rub the valve and valve seat with an abrasive compound.
(d) Recheck the valve seating position.