968 Cabriolet L4-2990cc 3.0L DOHC (1993)
Valve Spring: Specifications
Check valve spring installed height with special tool 9138/1
Intake height .............................................................................................................................................................. 38 + 0.5 mm (1.496 + 0.020 in)
Exhaust height ........................................................................................................................................................... 37 + 0.5 mm (1.457 + 0.020 in)