968 Cabriolet L4-2990cc 3.0L DOHC (1993)
Valve Guide: Specifications
Valve guides
Inside dia. ............................................................................................................................................................ 7 + 0.015 mm (0.2756 + 0.0006 in)
Valve guide/valve stem
Rocking clearance ........................................................................................................................................................................... 0.8 mm (0.031 in)