3. Completelyassembledand ready for installa- · tion. Do not remove the tensioning screw,

911 Carrera (996) Engine -Cylinder head, valve drive 3. Completelyassembledand ready for installa- tion. Do not remove the tensioning screw, special tool 9632 (with right-handthread) or 9632/1 (with left-handthread) until the bearing saddles and the chain tensioner have been fastened on the cylinder head. If allocation is correct, the groove or lug of the camshaft position sensor housing faces downward. v Illustration shows tensioning element 345_99 " of cylinder bank 1 -3 I~ ~ ~ :-i I 0 Relieveusing new special tool 9632/1 @ Q (with left-handthread) ~ 243_97 Information: Modifiedtensioning element (VarioCam)as of June 1999. The tensioning screw has been changedto a left-handthread. Can be identified by the index (57) in the area of the guide rails. Introduction as of engine number: 96/01 66X13484 for the C2 317_99 96/02 68X06737 for the C4 1505 33 Completing camshafts 15 -75 Printed in Germany -29, 1999 9961571