Installing Cylinder Heads

Information 

For Tightening Torques, tightening sequence and assembly overview, see → 1001IN TIGHTENING TORQUES, TIGHTENING SEQUENCES, ASSEMBLY OVERVIEWS

Information 

• If you are installing a replacement cylinder head, the contact surfaces between the hydraulic compensation elements, rocker arms and running surfaces of cams must be oiled before installing the cylinder head cover  .
• If you are replacing the cylinder head or cylinder head gasket, change the coolant and engine oil  .
• Replace screws that are tightened to an additional torque angle  .
• Replace self-locking nuts as well as sealing rings, seals and O-rings  .
• Note the different sealants for sealing surfaces and cylinder head screws   .
• Secure all hose connections with standard hose clamps   .

1. Secure the camshaft for cylinder bank 1 in "TDC" position using Camshaft Clamp T40133  .
   Fig 1: Locating Camshaft Clamp (T40133/1)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Secure the camshaft for cylinder bank 2 in "TDC" position using Camshaft Clamp T40133  .
   Fig 2: Locating Camshaft Clamp (T40133/2)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Secure the crankshaft -1-  in "TDC" position with Locking Pin T40069  .
   Fig 3: Identifying Pin (T40069)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Fit new seals for the front coolant pipe.
   1. 4.1. Fit cylinder-head gasket.
   2. 4.2. Installation position: "top" marking or part number must be visible.
   3. 4.3. Check dowel sleeves -arrows-  in the cylinder block.
   4. 4.4. Fit cylinder head.
      Fig 4: Locating Dowel Sleeves

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Tighten cylinder head screws.
   Fig 5: Cylinder Head Screws Tightening Sequence

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
6. Tighten screws for lower timing chain cover.

   Left cylinder head: 3 screws

   Right cylinder head: 4 screws

7. Further installation is performed in reverse order.