Valve stem-to-guide clearance

• Take diameter readings on valve stems and guides with a micrometer and bore gauge to check system-to-guide clearance.
• Be sure to take reading at more than one place along the length of each stem and guide.
• Replace valve and valve guide if clearance exceeds limit.

Valve stem outside diameter 

IN: 5.465 - 5.480 mm (0.2152 - 0.2157 in.) 

EX: 5.440 - 5.455 mm (0.2142 - 0.2147 in.) 

Valve guide inside diameter 

IN & EX: 5.500 - 5.512 mm (0.2166 - 0.2170 in.) 

Stem-to-guide clearance 

Standard 

IN: 0.020 - 0.047 mm (0.0007 - 0.0018 in.) 

EX: 0.045 - 0.072 mm (0.0017 - 0.0028 in.) 

Limit 

IN: 0.070 mm (0.0027 in.) 

EX: 0.090 mm (0.0035 in.) 

Fig 1: Checking Valve Stem Outside Diameter

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Checking Valve Guide Inside Diameter

Courtesy of SUZUKI OF AMERICA CORP.