Installing Exhaust Manifold - Cylinder Bank 4-6

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Information

Always replace seals.

Slide a new metal seal onto the studs on the turbocharger.
Fit exhaust manifold with new external Torx screws and hexagon nuts.
1. 2.1. Fit a new metal seal on the sealing face of the exhaust manifold.
2. 2.2. Press the turbocharger out slightly and slide the three-hole flange onto the studs on the turbocharger.
3. 2.3. Pre-position the exhaust manifold on the cylinder head with two new external Torx screws (E12, M8 x 27).
4. 2.4. Fit the other seven new screws on the cylinder head. → Exhaust manifold threaded joint
  
  Fig 1: Locating Exhaust Manifold Screws
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. 2.5. Fit three new M8 hexagon nuts (a/f 13) on the three-hole flange.
Fit and tighten external Torx screws on the exhaust manifold uniformly from the inside out.
Observe tightening sequence and specifications as for cylinder bank 1-3!

Fig 2: Exhaust Manifold With Catalytic Converter Screw Tightening Sequence
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Tighten three M8 hexagon nuts (a/f 13) on the turbocharger flange for the exhaust manifold -arrows- .
Tightening torque as for cylinder bank 1-3!

Fig 3: Loosening Exhaust Manifold Flange On Cylinder Bank (4-6)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Tighten external Torx screw (E12, M8 x 16) on the turbocharger holder → Holder for turbocharger 4-6 accessible through tailpipe opening .
→ Tightening torque: 23 Nm (17 ft. lb.)

Fig 4: Tightening External Torx Screw On Turbocharger Holder
Courtesy of PORSCHE CARS NORTH AMERICA, INC.