Seating contact width
WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.
Create contact pattern on each valve in the usual manner, i.e., by giving uniform coat of marking compound to valve seat and, by rotating and tapping seat with valve. Must use a valve lapper (tool use in valve lapping).
Pattern produced on seating surface of valve must be a continuous ring without any break, and the width of pattern must be within specified range.
Standard seating width "a" revealed by contact pattern on valve face
IN: 1.05 - 1.35 mm (0.0414 - 0.531 in.)
EX: 1.12 - 1.42 mm (0.0441 - 0.0559 in.)