Control Valve Upper Body: Inspection

Valve Spring 

• Measure free length and outer diameter of each valve spring. Also check for damage or deformation.
  1. Inspection standard: Refer to SDS,  LINE PRESSURE  . 
• Replace valve springs if deformed or fatigued.

Control Valves 

• Check sliding surfaces of valves, sleeves and plugs. 

Fig 1: Measuring Valve Spring Free Length And Outer Diameter

Courtesy of NISSAN MOTOR CO., U.S.A.