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Home >> Porsche >> 2012 >> Cayenne S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (15 - Engine - Cylinder Head, Valve Drive (4.8L Turbo) -- 92A - Cayenne (92A)) >> WM, 157019 Removing And Installing Cylinder Head >> Removing Cylinder Head

Removing Cylinder Head

WARNING: This page is about a different variant/trim than selected.
  1. Remove vent line.
    1. 1.1 Unscrew fastening screws -1-  .
    2. 1.2 Unclip vent line -2-  from the cable duct and remove it -arrow-  .
    G16307405Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Vent line

  2. Expose engine wire harness close to the vacuum pump. > Engine wire harness close to vacuum pump  > Engine wire harness at the rear right 
    G16307406Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Engine wire harness close to vacuum pump

    G16307407Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Engine wire harness at the rear right

  3. Unclip engine wire harness close to the high-pressure pump.
    1. 3.1 Unclip engine wire harness at the retaining clips -arrows A-  .
    2. 3.2 Unscrew the screw socket -arrow B-  .
    G16307408Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Engine wire harness close to high-pressure pump

  4. Lift wire harness up and out at the cylinder heads -arrow- 
    G16307409Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Engine wire harness

  5. Remove mounting saddle at the front -8-  (cylinder bank 1 to 4 shown). This hides the cylinder head screws underneath.
    Fig 1: Camshafts Components Location - Cylinder Bank 1 To 4
    G16307410Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Camshafts, cylinder bank 1 to 4

    1  Camshaft (outlet)
    2  Camshaft (intake)
    3  Hydraulic valve for variable valve lift control
    4  Screw, M5 x 12
    5  Switching tappet (oil with engine oil)
    6  Bucket tappet (oil with engine oil)
    7  Stopper
    8  Mounting saddle 1 to 4
    9  Stopper
    10  Bearing locations (oil with engine oil)
    A  Direction of travel
  6. Remove front M8 screw securing the cylinder head for cylinders 1 to 4 to the crankcase. -3- 
    G16307411Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Cylinder head 1 to 4

  7. Remove cylinder head screws in the opposite order to the tightening sequence shown > Tightening sequence for cylinder head  . Remove cylinder head. If necessary, remove the valve lifters now and lay them aside in the correct order.
    Fig 2: Cylinder Head Screws Tightening Sequence
    G16307412Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Tightening sequence for cylinder head

  8. Remove cylinder head gasket.
  9. Remove cylinder head for cylinders 5 to 8 in the same way. > Cylinder head 5 to 8 
    G16307413Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Cylinder head 5 to 8

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