Because of the design and the material used to construct the cylinder head of the 2.0L, 2.3L and 3.0L engines, the valve seats cannot be replaced. Instead, assuming the wear is not too great, the valve seat must be refaced using a grinding stone or cutting tool.
The valve seat refacing operation should be closely coordinated with the valve refacing portion because the finished angles of the valve face and valve seat must be to specifications to provide a compression-tight fit. Because of the close tolerances involved, it is recommended this procedure be completed by a machine shop.
Be sure that the refacer grinding wheels are properly dressed.
Grind the valve seat to specified degree angle. Remove only enough stock to clean up pits and grooves or to correct the valve seat runout. After the seat has been refaced, use a seat width scale or a machinist scale to measure the seat width. Narrow the seat, if necessary, to bring it to within specification. If the valve seat width exceeds the maximum limit, remove enough stock from the top edge and/or bottom edge of the seat to reduce the width to specification.