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.)