Removing Valve Tappets Of Cylinder Bank 1 - 3

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Move camshafts of cylinder bank 1-3 to basic position or removal position. Turn crankshaft clockwise until the bore 1 OT (top dead Centre) in the pulley is aligned with the fixing bore on the crankcase. Position or fix with fixing pin (short) of special tool 9595.

Fig 1: Installing Special Tool (9595) In Belt Pulley
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NOTE:
- The basic camshaft adjustment can be checked only after removal of the camshaft closure caps.
Remove camshaft closure caps above the cylinder-head oil pumps. The closure cap of cylinder bank 1-3 is located on the flywheel side and the closure cap of cylinder bank 4-6 is located on the pulley side. Drive awl into Centre of the closure cap and lever off the cap.

Fig 2: Removing Camshaft Closure Caps - Cylinder Bank 1-3
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Drawing shows closure cap of cylinder bank 4 - 6 (pulley side)
Check basic camshaft adjustment of cylinder bank 1 - 3. The groove in the camshaft must face outward toward the cylinder-head cover.

Fig 3: Checking Basic Camshaft Adjustment Of Cylinder Bank 1-3
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View from the flywheel side

If the position of the camshafts is incorrect, remove fixing pin at the pulley and rotate the crankshaft 360° clockwise.

Then position or fix the fixing pin in the bore (1 OT) and in the fixing bore in the crankcase again.
Unscrew chain tensioner of cylinder bank 1 - 3.

Fig 4: Identifying Chain Tensioner - Cylinder Bank 1-3
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Installation position of chain tensioner on cylinder bank 1-3
Detach and remove oil extraction pump at cylinder head 1-3 on the flywheel side.

Fig 5: Removing Oil Extraction Pump
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Separate plug connection of the tensioning element (VarioCam).
Unscrew two hexagon-head bolts (M6 x 20) and remove closure cap from the tensioning element (VarioCam).
Remove ignition coils, spark plugs and oil protection tubes.
NOTE:
- As the available space is limited, the oil protection tubes must be removed before the cylinder-head cover can be removed.
- Refer to REMOVING AND INSTALLING OIL PROTECTION TUBE .
Remove the camshaft closure caps from the passenger compartment side. Drive awl into Centre of the closure cap and lever off the cap.

Fig 6: Removing Camshaft Closure Caps
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Fit special tool, holding-down device 9624, on the cylinder head. Fasten holding-down device with a hexagon-head bolt M8 x 30.

Fig 7: Installing Special Tool (9624) On The Cylinder Head
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Remove cylinder-head cover. Loosen the hexagon-head bolts from the outside to the inside. Detach cylinder-head cover by tapping lightly with a plastic hammer.
Additionally fasten a holding-down device of special tool 9611 using M6 x 45 auxiliary screws.
Relieve camshaft tensioning element with special tool, tensioning screw 9632. Screw tensioning screw in only until the chain is slightly relieved.

Fig 8: Relieving Camshaft Tensioning Element With Tensioning Screw 9632
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Unscrew three fastening screws (M6 x 95) for tensioning element.
Affix auxiliary chain tensioner (screw in by approx. 3 turns). Undo four hexagon-head bolts (M6 x 15) on the chain sprocket. Remove auxiliary chain tensioner again.

Fig 9: Locating Hexagon-Head Bolts For Chain Sprocket
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Remove drive plate. Remove sprocket wheel and chain and connect with a tie wrap (installation position).

Fig 10: Locating Sprocket Wheel And Chain
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Detach bearing saddles and lever out of the guide sleeves.
Remove special tools, holding-down devices 9611 and 9624, 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.

Fig 11: Removing Special Tools (9611 And 9624)
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Lift out valve tappets with a magnet.
Detach guide for valve tappets. Undo the pan-head screws (15 ea.) from the outside to the inside and remove the guide.

Fig 12: Detaching Guide For Valve Tappets

Courtesy of PORSCHE OF NORTH AMERICA, INC.