911 Carrera 4 Cabriolet (996) F6-3.4L (1999)
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Rear axle cross member removed for clearer illustration
18. Undo four hexagon-head bolts (M6 x 15) on the chain sprocket.
19. Undo four hexagon-head bolts (M6 x 15) on the chain sprocket.
20. Relieve chain of tension. Unscrew chain tensioner of cylinder bank 1 - 3. ("2 rings" identification on chain tensioner and crankcase).
21. Take off drive plate of oil extraction pump. Remove sprocket wheel and chain and connect with a tie wrap (installation position).
22. Detach bearing saddles and lever out of the guide sleeves by hand. Do not use a tool.
23. Remove special tools (holding-down devices 9611 and 9634) and carefully lift the entire unit, consisting of camshafts with chain and tensioning
element, out of the cylinder head. The chain must not jump over during this operation; reallocate if necessary. The groove or tab of the camshaft
position sensor cover must face upward.
24. Pull out valve tappets by hand.
Note: Do not use a magnet.
