Valve Face
WARNING: This page is about a different car, the 2003 Saturn Vue and 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
When resurfacing valve face or tip, remove only enough metal to clean face or tip. Valve faces cannot be machined. If worn, grooved or damaged, the valves must be replaced. The valves may be lightly hand-lapped to the valve seats.