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Valve Spring Inspection

  1. Measure the installed length of each valve spring. Verify the length is within specification. Refer to SPECIFICATIONS .
  2. Measure the free length of each valve spring. Verify the length is within specification. Refer SPECIFICATIONS .
    Fig 1: Measuring Valve Spring Free Length
    G02821350Courtesy of MAZDA MOTORS CORP.
  3. Measure the out-of-square on each valve spring.
    1. Turn the valve spring and observe the space between the top of the valve spring and the square.
    2. Replace the valve spring if out of specification. Refer to CYLINDER HEAD & VALVE SPECIFICATIONS .
    Fig 2: Measuring Valve Spring Out-Of-Square
    G02821351Courtesy of MAZDA MOTORS CORP.
  4. Check the valve springs for proper strength at the specified valve spring length.
    Fig 3: Measuring Valve Spring Strength
    G02821352Courtesy of MAZDA MOTORS CORP.
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