Valve Seat
WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
If the variation in the width exceeds 0.2 mm (0.008 inch) even if the contact width is within the standard value, replace or correct the valve sheet.
Assemble the valve, then measure the contact width. If the measurement exceeds the specified limit, replace the valve seat.
Standard value Inlet: 1.16 - 1.46 mm (0.046 - 0.058 inch) Exhaust: 1.35 - 1.65 mm (0.053 - 0.065 inch)