Valve Spring Inspection

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 Mazda 6, 2007 Mazda 6, 2006 Mazda 6, 2005 Mazda 6, and 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

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