Toyota Yaris: Cylinder Head / Repair

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Mechanical) / Cylinder Head / Repair

REPAIR

PROCEDURE

1. REPAIR INTAKE VALVE SEAT

NOTICE:

While repairing the intake valve seat, make sure to constantly check the valve seat width and valve seating position.
Release the cutter gradually to make the intake valve seat smooth.

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

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

Standard Width:

1.0 to 1.4 mm (0.0394 to 0.0551 in.)

Width

(d) Check the intake valve seating position.

2. REPAIR EXHAUST VALVE SEAT

NOTICE:

While repairing the exhaust valve seat, make sure to constantly check the valve seat width and valve seating position.
Release the cutter gradually to make the exhaust valve seat smooth.

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

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

Standard Width:

1.2 to 1.6 mm (0.0472 to 0.0630 in.)

Width

(d) Check the exhaust valve seating position.

Reassembly

REASSEMBLY PROCEDURE 1. INSTALL SPARK PLUG TUBE HINT: When using a new cylinder head sub-assembly, the spark plug tubes must be replaced. (a) Apply adhesive to a new spark plug tube as shown in the illustration...

Cylinder Head Gasket

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