Group 21, Turbocharging

Information 

Tighten screw-type clamps for securing pressure and intake pipes and pressure and suction hoses to charge-air cooler and turbocharger to → Tightening torque: 5.5 Nm (4 ftlb.)  .

Fig 1: Identifying Turbocharger, Cylinders 1 To 4

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Coolant return line for turbocharger → Tightening torque: 30 Nm (22 ftlb.) 
2. Coolant supply line for turbocharger → Tightening torque: 30 Nm (22 ftlb.) 
3. Clamp
4. Coolant supply hose for turbocharger
5. Turbocharger; exhaust manifold/turbocharger module

Fig 2: Identifying Turbocharger, Cylinders 5 To 8

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Coolant return line for turbocharger → Tightening torque: 30 Nm (22 ftlb.) 
2. Coolant supply line for turbocharger → Tightening torque: 30 Nm (22 ftlb.) 
3. Coolant supply line holder to oil guide housing → Tightening torque: 10 Nm (7.5 ftlb.) 

Fig 3: Oil Circuit For Turbocharger, Cylinders 1 To 4

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Turbocharger vent line for cylinders 1 to 4; vent line to turbocharger oil extraction line → Tightening torque: 35 Nm (26 ftlb.)  and vent line retaining clip to collection pipe → Tightening torque: 6.5 Nm (5 ftlb.) 
2. Turbocharger oil feed line for cylinders 1 to 4; turbocharger oil feed line to connection piece → Tightening torque: 40 Nm (30 ftlb.)  ; turbocharger oil feed line to cylinder head → Tightening torque: 35 Nm (26 ftlb.) not shown  - Check valve connection piece to turbocharger → Tightening torque: 45 Nm (33 ftlb.) 
3. Holder
4. Seal
5. Oil extraction line
6. Screw, M6 x 12; turbocharger oil extraction line to oil guide housing → Tightening torque: 10 Nm (7.5 ftlb.)  and turbocharger oil supply line holder → Tightening torque: 10 Nm (7.5 ftlb.) 
7. Screw, M6 x 16 → Tightening torque: 10 Nm (7.5 ftlb.) 

Fig 4: Oil Circuit For Turbocharger, Cylinders 5 To 8

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Turbocharger oil feed line for cylinders 5 to 8; turbocharger oil feed line to connection piece → Tightening torque: 40 Nm (30 ftlb.)  ; turbocharger oil feed line to cylinder head → Tightening torque: 35 Nm (26 ftlb.) 
2. Turbocharger vent line for cylinders 5 to 8; vent line to turbocharger oil extraction line → Tightening torque: 35 Nm (26 ftlb.) 
3. Screw, M6; turbocharger oil extraction line to oil guide housing → Tightening torque: 10 Nm (7.5 ftlb.)  and retaining clip → Tightening torque: 6.5 Nm (5 ftlb.) 
4. Retaining clip
5. Oil extraction line
6. Screw, M6 x 16 → Tightening torque: 10 Nm (7.5 ftlb.) 
7. Seal

Fig 5: Identifying Turbocharger Exhaust Manifold, Cylinders 1 To 4

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Turbocharger exhaust manifold, cylinders 1 to 4
2. Seal; install so that marking on seal is legible
3. Lower tab washer
4. Upper tab washer
5. Nut M8; turbocharger exhaust manifold to cylinder head; replace → Tightening torque: 27 Nm (20 ftlb.) 

Fig 6: Identifying Turbocharger Exhaust Manifold, Cylinders 5 To 8

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Turbocharger exhaust manifold, cylinders 5 to 8
2. Seal; install so that marking on seal is legible
3. Nut M8; turbocharger exhaust manifold to cylinder head; replace → Tightening torque: 27 Nm (20 ftlb.) 
4. Upper tab washer
5. Lower tab washer

Fig 7: Tightening Sequence For Turbocharger Exhaust Manifold

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1 to 12  - applies to both sides, always start at the timing-case cover

Fig 8: Identifying Boost Pressure And Wastegate 1

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Pressure line, boost pressure line
2. Hose clamp
3. Cycle valve
4. Support to timing-case cover
5. Combination holder
6. Wastegate control line for cylinders 5 to 8
7. Wastegate control line for cylinders 1 to 4
8. Hose holder
9. Screw to timing-case cover; see Timing-case cover

Fig 9: Identifying Boost Pressure And Wastegate 2

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Pressure line
2. Vacuum line
3. Hose clamp
4. Screw, M6 x 12 → Tightening torque: 10 Nm (7.5 ftlb.) 
5. Holder
6. Rubber element
7. Electric change-over valve
8. Control line

1. View A; connection of pressure line to intake-air distributor