RM35X0E _51 Engine / Hybrid System _078603 7GR-FKS ENGINE MECHANICAL _0381345 CYLINDER HEAD A

7GR-FKS ENGINE MECHANICAL  CYLINDER HEAD  REPAIR  


PROCEDURE

Hide 1.REPAIR INTAKE VALVE SEATS

NOTICE:
·

Repair the intake valve seat while checking the seating position.

·

Keep the lip free of foreign matter.



a.
A278404

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


b.
A378843C01
2.76,1.646 3.073,1.844 0.313,0.198 10 false *a 2.802,0.021 3.115,0.219 0.313,0.198 10 false 60° 3.063,0.156 3.375,0.354 0.313,0.198 10 false 45° 3.188,0.427 3.427,0.615 0.24,0.188 10 true 30°
*a Standard Width


Using 30° and 60° cutters, correct the valve seat so that the intake valve contacts the entire circumference of the seat. The contact should be in the center of the intake valve seat, and the intake valve seat width should be maintained within the specified range around the entire circumference of the intake valve seat.

Standard width:

1.1 to 1.5 mm (0.0433 to 0.0591 in.)



c.

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


d.

Check the intake valve seating position.


Hide 2.REPAIR EXHAUST VALVE SEATS

NOTICE:
·

Repair the exhaust valve seat while checking the seating position.

·

Keep the lip free of foreign matter.



a.
A278405

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


b.
A124255C36
2.563,0.042 2.802,0.198 0.24,0.156 10 false 75° 2.979,0.135 3.219,0.292 0.24,0.156 10 false 45° 3.167,0.417 3.406,0.573 0.24,0.156 10 false 30° 2.802,1.771 2.969,1.958 0.167,0.188 10 false *a
*a Standard Width


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

Standard width:

1.1 to 1.5 mm (0.0433 to 0.0591 in.)



c.

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


d.

Check the exhaust valve seating position.