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Removing Valve Tappets Of Cylinder Bank 4 - 6

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  1. Remove fixing pin. Turn crankshaft 360° 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 In The Pulley
    G03092452Courtesy of PORSCHE OF NORTH AMERICA, INC.
  2. Check camshaft adjustment at cylinder bank 4-6: The groove in the camshaft must face inward toward the crankcase.
    Fig 2: Checking Camshaft Adjustment At Cylinder Bank 4-6
    G03092453Courtesy of PORSCHE OF NORTH AMERICA, INC.

    View from the pulley side

  3. Unscrew chain tensioner of cylinder bank 4 - 6.
    Fig 3: Unscrewing Chain Tensioner Of Cylinder Bank 4-6
    G03092454Courtesy of PORSCHE OF NORTH AMERICA, INC.
  4. Detach and remove oil extraction pump at cylinder head 4 - 6 (pulley side).
    Fig 4: Removing Oil Extraction Pump At Cylinder Head 4-6 (Pulley Side)
    G03092455Courtesy of PORSCHE OF NORTH AMERICA, INC.
  5. Separate plug connection of the tensioning element (VarioCam).
  6. Unscrew two hexagon-head bolts (M6 x 20) and remove closure cap from the tensioning element (VarioCam).
  7. 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 - ENGINE INSTALLED .

  8. Remove the camshaft closure caps from the underside of the vehicle. Drive awl into Centre of the closure cap and lever off the cap.
  9. Fit special tool, holding-down device 9624, on the cylinder head. Fasten holding-down device with a hexagon-head bolt M8 x 30.
    Fig 5: Fitting Special Tool, Holding-Down Device 9624, On The Cylinder Head
    G03092456Courtesy of PORSCHE OF NORTH AMERICA, INC.
  10. 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.
  11. Additionally fasten a holding-down device of special tool 9611 using M6 x 45 auxiliary screws.
  12. Relieve camshaft tensioning element with tensioning screw, special tool 9632. Screw tensioning screw in only until the chain is slightly relieved.
  13. Unscrew three fastening screws (M6 x 95) for tensioning element.
  14. 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.
  15. Remove drive plate. Remove sprocket wheel and chain and connect with a tie wrap for the subsequent installation position.
    Fig 6: Locating Sprocket Wheel And Chain
    G03092457Courtesy of PORSCHE OF NORTH AMERICA, INC.
  16. Detach bearing saddles and lever out of the guide sleeves.
  17. 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 heads. The chain must not jump over during this operation; reallocate if necessary.
    Fig 7: Locating Tab On Camshaft
    G03092458Courtesy of PORSCHE OF NORTH AMERICA, INC.
  18. Lift out valve tappets with a magnet.
  19. Detach guide for valve tappets. Undo the pan-head screws (15 ea.) from the outside to the inside and remove the guide.
    Fig 8: Locating Guide For Valve Tappets Pan Head Screws
    G03092459Courtesy of PORSCHE OF NORTH AMERICA, INC.
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