Adjusting timing - Cylinder bank 1 - 3: Requirements

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Three auxiliary chain tensioners fitted with correct pre-tension.

Turn engine to installation position on assembly support.
Remove fixing pin. Advance crankshaft 360° clockwise until the bore 1 OT (top dead center) in the belt pulley is aligned with the fixing bore on the crankcase. Position or fix with fixing pin (short) of special tool 9595.

Fig 1: Aligning Belt Pulley Bore 1 OT With Fixing Bore On The Crankcase
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Check basic camshaft adjustment of cylinder bank 1 - 3 Ensure that the groove in the camshaft faces outward toward the cylinder head cover.
View from the flywheel side

Fig 2: Ensuring Groove In The Camshaft Faces Outward Toward Cylinder Head Cover - Cylinder Bank 1-3
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Turn engine 90° clockwise on the assembly support. Cylinder bank 1 - 3 faces upward.
If the allocation is correct, the narrow segment must face the cylinder head cover on the opposite side of the cylinder head.
View from the belt pulley side

Fig 3: Identifying Narrow Segment On End Of Camshaft
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Fasten blocking device (special tool 9612) on the cylinder head.

Fig 4: Fastening Blocking Device On Cylinder Head
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Special tool fitting sequence:

SPECIAL TOOL FITTING SEQUENCE

A -	Fastening screw with star knob on cylinder head lug. Pull back centring piece (B) and sword bolt (C) when tightening.
B -	Centring piece in groove of the exhaust camshaft Pull sword bolt (C) back when tightening.
C -	Sword bolt
D -	Centre section (pivoting).

Fig 5: Identifying Special Tool Fitting Sequence

Courtesy of PORSCHE OF NORTH AMERICA, INC.

Undo four hexagon-head screws (M6 x 15) on the sprocket wheel on the opposite side.
Allocate camshafts; to do this, turn the pre-tensioned center piece (D) accordingly until the sword bolt (C) can be fixed in the bearing bore of the inlet camshaft.

Fig 6: Turning Pre-Tensioned Centre Piece
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Fasten sprocket wheel. Tightening torque 14 Nm (10.5 ftlb.)
Remove blocking device.