Removing Exhaust Manifold For Cylinder Bank 5 - 8

Information 

The pictures shown in this document may differ from the original.

Information 

On turbo engines, there is no need to remove the primary catalytic converter and turbocharger when removing the exhaust manifold.

1. Unclip the oxygen sensor cable from all holders. Remove oxygen sensor when replacing exhaust manifold. Cylinders 5 to 8 > Oxygen sensor on naturally aspirated engine, cylinders 5 to 8  .
   Fig 1: Oxygen Sensor Components Location - Naturally Aspirated Engine, Cylinders 5 To 8

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Oxygen sensor on naturally aspirated engine, cylinders 5 to 8

   1	Oxygen sensor on primary catalytic converter
   2	Screw, M6 x 12
   3	Holder
   4	Holder
   5	Holder
   6	Cable attachment
   7	Cable attachment
   A	View A

2. Spray fastening nuts on the exhaust manifold with anti-rust agent if necessary.
3. Loosen the fastening nuts in reverse order to the sequence shown below > Tightening sequence for exhaust manifold on naturally aspirated engines, cylinders 1 to 4 (identical to cylinders 5 to 8)  . Remove exhaust manifold.

   Replace fastening nuts.

   Fig 2: Exhaust Manifold Screws Loosening Sequence - Naturally Aspirated Engines, Cylinders 1 To 4 (Identical To Cylinders 5 To 8)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Tightening sequence for exhaust manifold on naturally aspirated engines, cylinders 1 to 4 (identical to cylinders 5 to 8)

4. Only for vehicles with turbocharger: 

   Loosen fastening screws -3-  for the turbocharger.

   The turbocharger and the primary catalytic converters must not be removed. 

5. Only for vehicles with turbocharger: 

   Loosen the fastening nuts on the exhaust manifold in reverse order to the sequence shown and remove them > Tightening sequence for exhaust manifold on turbo engines, cylinders 1 to 4 (identical to cylinders 5 to 8)  . Remove exhaust manifold. Replace nuts.

   Fig 3: Exhaust Manifold Screws Loosening Sequence - Turbo Engines, Cylinders 1 To 4 (Identical To Cylinders 5 To 8)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Tightening sequence for exhaust manifold on turbo engines, cylinders 1 to 4 (identical to cylinders 5 to 8)

6. Remove the seal and replace it. Clean sealing faces. Cylinders 5 to 8 > Exhaust manifold on naturally aspirated engine, cylinders 5 to 8  .
   Fig 4: Exhaust Manifold Components Location - Naturally Aspirated Engine, Cylinders 5 To 8

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Exhaust manifold on naturally aspirated engine, cylinders 5 to 8

   1	Exhaust manifold
   2	Seal
   3	Hexagon nut, M8
   4	Oxygen sensor
   A	Marking on seal visible from outside

7. Only for vehicles with turbocharger: 

   Remove the seal and replace it. Clean sealing faces. Cylinders 5 to 8 > Exhaust manifold on turbo engine, cylinders 5 to 8  .

   Fig 5: Exhaust Manifold Components Location - Turbo Engine, Cylinders 5 To 8

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Exhaust manifold on turbo engine, cylinders 5 to 8

   1	Exhaust manifold
   2	Hexagon nut, M8
   3	Screw, M8 x 75
   4	Turbocharger seal
   5	Exhaust manifold seal
   A	Marking on seal visible from outside