911 Carrera 4 Cabriolet AWD F6-3600cc 3.6L SOHC (1990)
bolt rubber damper (5) on the secondary mass.
After removal of these bolts, primary and secondary masses can be pried apart with the help of bolts.
Plugs (11) and mounting bolts (12) must always be replaced after disassembling.
The following repairs are possible:
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Replacement of starter gear ring
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Replacement of secondary mass with mounted ball bearing (9)