Valve Spring Inspection

• Referring to data given below, check to be sure that each spring is in sound condition, free of any evidence of breakage or weakening. Remember, weakened valve springs can cause chatter, not to mention possibility of reducing power output due to gas leakage caused by decreased seating pressure.

Valve Spring Free Length 

Fig 1: Valve Spring Free Length Specifications Chart

Courtesy of SUZUKI OF AMERICA CORP.

Valve Spring Preload 

Fig 2: Valve Spring Preload Specifications Chart

Courtesy of SUZUKI OF AMERICA CORP.

Fig 3: Measuring Valve Spring Free Length & Identifying Valve Spring Preload Measuring Tool

Courtesy of SUZUKI OF AMERICA CORP.

Valve Spring Squareness 

Spring squareness: 

Use a square and surface plate to check each spring for squareness in items of clearance between end of valve spring and square. Valve springs found to exhibit a larger clearance than limit given below must be replaced.

Limit:  2.0 mm (0.079 in.)

Fig 4: Identifying Tool Setup (For Valve Spring Squareness)

Courtesy of SUZUKI OF AMERICA CORP.