FixVault

Valve Inspection

  1. Measure the valve head margin thickness of each valve. Replace valve as necessary.

    Margin Thickness 

    IN: 0.70-1.50 mm {0.028-0.059 in} 

    EX: 0.55-1.55 mm {0.022-0.061 in} 

    Fig 1: Measuring Valve Head Margin
    G95C12999Courtesy of MAZDA MOTORS CORP.
  2. Measure the length of each valve. Replace the valve as necessary.

    Standard Length 

    IN: 89.49-90.09 mm {3.524-3.546 in} 

    EX: 89.79-90.39 mm {3.536-3.558 in} 

    Minimum Length 

    IN: 89.28 mm {3.515 in} 

    EX: 89.38 mm {3.519 in} 

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

    Standard Diameter 

    IN: 5.970-5.985 mm {0.2351-0.2356 in} 

    EX: 5.965-5.980 mm {0.2349-0.2354 in} 

    Minimum Diameter 

    IN: 5.920 mm {0.2331 in} 

    EX: 5.915 mm {0.2329 in} 

    Fig 2: Measuring Valve Stem Diameter
    G00386849Courtesy of MAZDA MOTORS CORP.