Cylinder Head Assembly: Technical Service Bulletins

• Cylinder Heads - Tightening Procedure & Service Changes
  • Overview
  • 924 Model
  • 924 Turbo Model
  • 924S, 944, 944S, 944 Turbo Model
  • 911 Carrera Model
  • 928, 928S, 928 S4 Model
• Cylinder Head - Revised Torque Value and Procedure
• Cylinder Heads - Machining and Using Correct Gaskets
• Sodium Filled Valves - Scrapping Instructions