Cylinder Head - Repair

Brand:

Toyota

Model Name:

Yaris NCP90 91 92 93

Manual:

Repair Manual

Section:

2Nz-Fe Engine Mechanical

Title:

Cylinder Head

  1. Repair intake valve

  2. Repair exhaust valve



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1. REPAIR INTAKE VALVE


Repair the intake valve seat.NOTICE: Releasing the seat-cutter pressure gradually helps to make the valve seat face smoother. Yaris

  1. Repair the intake valve seat.

    NOTICE:
    Releasing the seat-cutter pressure gradually helps to make the valve seat face smoother.

  1. If the seating is too high on the valve face, use 20° and 45° cutters to correct the seat.

  1. If the seating is too low on the valve face, use 75° and 45° cutters to correct the seat. Yaris

  2. If the seating is too low on the valve face, use 75° and 45° cutters to correct the seat.

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

  1. Recheck the valve seating position.



2. REPAIR EXHAUST VALVE
NOTICE:
Releasing the seat-cutter pressure gradually helps to make the valve seat face smoother.

  1. If the seating is too high on the valve face, use 20° and 45° cutters to correct the seat.

  1. If the seating is too low on the valve face, use 75° and 45° cutters to correct the seat.

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

  1. Recheck the valve seating position.