Valve Spring Inspection

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Apply pressing force to the pressure spring and inspect the spring height.
- If not as specified, replace the valve spring.
Pressing Force
1. 680 N {69.3 kgf, 152 lbf}
Standard Height
1. 30.19 mm {1.189 in}
  
  Fig 1: Applying Pressing Force
  Courtesy of MAZDA MOTORS CORP.
Measure the out-of-square of the valve spring.
- If not as specified, replace the valve spring.
Valve Spring Maximum Out-Of-Square
1. 1% (0.468 mm {0.00184 in})
  
  Fig 2: Measuring Valve Spring Out-Of-Square
  Courtesy of MAZDA MOTORS CORP.