911 Targa 4S (997) F6-3.8L (2007)
Release mechanism
2. Unscrew fastening screws for guide sleeve -arrows- and pull off guide sleeve.
Guide sleeve
3. Use a pointed object such as a needle or scriber to punch a hole in the sealing ring.
Punching hole
4. Screw a sheetmetal screw (approx. 3 mm in diameter) 5 mm into the hole in the sealing ring.