Cutlass Supreme V6-3100 3.1L MFI VIN M (1994)
Valve Guide: Service and Repair
Valve guides are an integral part of the cylinder head and are not removable. If valve stem clearance becomes excessive, the valve guide should be
reamed to the next oversize and the appropriate oversize valves installed. Valves are available in 0.003, 0.015 and 0.030 inch oversizes.