Valve Guide Servicing

If valve stem to guide clearance exceeds specifications, valve guide must be reamed and a valve with a 0.010" oversize valve stem installed. Ream guide with a 0.006" oversize reamer and then a 0.010" oversize reamer. A valve with a 0.006" oversize valve stem may be installed at factory. Oversize valves are identified by an oversize marking on valve head.