Procedures

2AZ-FXE ENGINE MECHANICAL: CYLINDER HEAD: REPAIR

1. INSPECT INTAKE VALVE SEAT

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(a) Apply a light coat of Prussian blue to the valve face.

(b) Lightly press the valve face against the valve seat.

(c) Check the valve face and valve seat according to the following procedure:

(1) If Prussian blue appears 360° around the entire valve face, the valve face is concentric. If not, replace the valve.

(2) If Prussian blue appears 360° around the entire valve seat, the guide and valve face are concentric. If not, resurface the valve seat.

(3) Check that the valve face width is between 1.0 and 1.4 mm (0.0394 and 0.0551 in.).

2. INSPECT EXHAUST VALVE SEAT

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(a) Apply a light coat of Prussian blue to the valve face.

(b) Lightly press the valve face against the valve seat.

(c) Check the valve face and valve seat according to the following procedure:

(1) If Prussian blue appears 360° around the entire valve face, the valve face is concentric. If not, replace the valve.

(2) If Prussian blue appears 360° around the entire valve seat, the guide and valve face are concentric. If not, resurface the valve seat.

(3) Check that the valve face width is between 1.2 and 1.6 mm (0.0472 and 0.0630 in.).

3. REPAIR VALVE SEATS

NOTICE:
* Repair the seat while checking the seating position.
* Keep the lip free from foreign matter.
(a) Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the specification.

(b) Using 30° to 75° cutters, correct the valve seat so that the valve contacts the entire circumference of the 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 seat.

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Valve Seat Width: