RM3660EC _51 Engine / Hybrid System _080726 8ZR-FXE ENGINE MECHANICAL _0391621 CYLINDER HEAD N

8ZR-FXE ENGINE MECHANICAL  CYLINDER HEAD  REPAIR  


PROCEDURE

Hide 1.REPAIR VALVE SEAT

NOTICE:
·

Repair the valve seat while checking the seating position.

·

Release the cutter gradually to make the valve seat smooth.



a.
A374052

Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the standard.


b.
A378012C01
2.083,0.156 2.542,0.354 0.458,0.198 10 false 75° 2.646,0.625 3.104,0.823 0.458,0.198 10 false 45° 2.563,1 3.021,1.198 0.458,0.198 10 false 30° 2.521,1.531 2.833,1.729 0.313,0.198 10 false *a
*a Valve Seat Width


Using 30° and 75° cutters, resurface the valve seat so that the valve contacts the entire circumference of the valve seat. The contact should be in the center of the valve seat, and the valve seat width should be maintained within the specified range around the entire circumference of the valve seat.

Standard Valve Seat Width:

1.0 to 1.4 mm (0.0394 to 0.0551 in.)



c.

Hand lap the valve and valve seat with an abrasive compound.


d.

Check the valve seating position.