Select Fitting

- If the valve stem-to-valve guide clearance exceeds the service clearance, ream the valve guide for the next oversize valve stem.
- Valves with oversize stem diameters of 0.38 mm (0.015 inch) and 0.76 mm (0.030 inch) are available for service in diameters of 0.41 mm and 0.81 mm (0.016 inch and 0.032 inch) oversize.
- Always reface the valve seat after the valve guide has been reamed. Refer to Valve Guides, Reaming.