Valve Guide Inspection

Measure the inner diameter of each valve guide in "X" and "Y" directions at the 3 points (A, B and C) shown. Replace the guide as necessary.
Standard Inner Diameter

6.01-6.03 mm {0.2367-0.2374 in}

Fig 1: Measuring Valve Guide Inner Diameter
Courtesy of MAZDA MOTORS CORP.
Measure the projection height (dimension "A") of each valve guide without lower valve spring seat. Replace valve guide as necessary.
Standard Height

13.5-14.1 mm {0.532-0.555 in}

Fig 2: Measuring Valve Guide Height
Courtesy of MAZDA MOTORS CORP.