Installing Exhaust Manifold With Catalytic Converter

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Fit exhaust manifold with new metal seal and new lock nuts -1- on the three-hole flange for the front silencer.

Fig 1: Identifying Three-Hole Flange On Exhaust Manifold
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 1.1. To do this, press the front silencer -2- towards the rear with a mounting lever -1- with the help of another person.
  
  Fig 2: Removing Front Silencer
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Fit exhaust manifold with new metal seal and nine external Torx screws (E12, M8 x 21) on the cylinder head flange.
1. 2.1. The tab of the seal -arrow- must be facing the cylinder head.
  
  Fig 3: Locating Exhaust Manifold Seal Installation Position
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 2.2. Tighten screws -2- evenly according to the prescribed tightening sequence.
  
  Fig 4: Exhaust Manifold Screw Tightening Sequence (Side 1-3)
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  
  Fig 5: Exhaust Manifold Screw Tightening Sequence (Side 4-6)
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. 2.3. Tighten screws to the prescribed torque and according to the specified tightening sequence (see TIGHTENING SPECIFICATIONS ).
Tighten new M8 lock nuts on the three-hole flange.
Information
- When reinstalling oxygen sensors, grease the thread with the Optimol Paste MF lubricant (Part No. 000.043.207.07) only.
- New oxygen sensors have already been greased and the thread is fitted with a protection cap.
Turn the oxygen sensor cable anti-clockwise by about four turns and screw in and tighten the oxygen sensor.
→ Tightening torque: 50 Nm (37 ft. lb.) +/-8 Nm (+/-6 ft. lb.)
1. 4.1. Clip in oxygen sensor cable at the clip-in points.