Valve seat and valve repair [Toyota Corolla E80]

Valve seats with traces of burnout and wear can be repaired as long as the correction angle and sufficient width of the working chamfer of the seat are preserved. If repair is impossible due to seat wear, the cylinder head must be replaced. Valve seats can be replaced using conventional technical means. A special device with a rotating spindle is used to repair valve seats. These works must be carried out in specialized repair shops.





To check the tightness of the valves, their seats are covered with a thin layer of Berlin glaze or lead white. The valve is inserted and pressed lightly against the seat.

Note: The valve must not be turned. If the paint is not evenly distributed over the valve seat, the seat must be machined.

Valve sizes

¹⁾ The total length of the valve can be ground down by up to 0.5 mm.
²⁾ Overall length of primary intake valve.
³⁾ Overall length of secondary intake valve.