Valve - Inspection

WARNING: This page is about a different car, the 2003 Mazda Tribute and 2002 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the following valve areas:
1. The end of the stem for grooves or scoring
2. The valve face and the edge for pits, grooves or scores
3. The valve head for signs of burning, erosion, warpage and cracking.
4. The valve head thickness for wear
  
  Fig 1: Inspecting Valve
  Courtesy of MAZDA MOTORS CORP.