Component Overview

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Fig 1: Overview Of High-Pressure Pump On Turbo Engine Component

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

6-piston high-pressure pump
High-pressure line
Low-pressure line
Cover
Heat protection
External Torx screws, M6 x 25
External Torx screw, M6 x 40
External Torx screws, M6 x 12
O-ring - always replace

Disconnect supply hose for coolant pump.
1. 1.1. Open the spring band clamp -2- and pull off coolant hose -1- .
  
  Fig 2: Identifying Coolant Pump And Coolant Hose
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove coolant pipe.
1. 2.1. Unscrew external Torx screws (E10, M6 x 12) -1- and pull off coolant pipe -2- .
  
  Fig 3: Identifying Coolant Pipe Mounting
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove heat protection panel for high-pressure pump.
1. 3.1. Disconnect cable plug for flow control valve -2- and unclip cable -2- .
2. 3.2. Unscrew three external Torx screws (E10, M6 x 12) -3- and remove heat protection panel -4- .
  
  Fig 4: Identifying High-Pressure Pump Heat Protection Panel (Naturally Aspirated Engine)
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove cover for high-pressure pump.
1. 4.1. Unscrew external Torx screws (E10) M6 x 25 -1- and (E10) M6 x 40 -2- .
2. 4.2. Guide out cover for high-pressure pump.
  
  Fig 5: Identifying High-Pressure Pump With Cover
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
WARNING:
Highly inflammable or explosive materials
- Danger of fire or explosion
→ Avoid contact with hot parts or sources of ignition.

→ Use suction to remove ignitable vapors.

→ Attach warning sign in a clearly visible position.

Information
- If the union nuts on the fuel lines at the high-pressure pump cannot be screwed off by hand after loosening them, the relevant line must be replaced.
Remove fuel lines for high-pressure pump.
1. 5.1. Loosen union nut on fuel low-pressure line (a/f 17) -1- .
  
  Fig 6: Identifying High-Pressure Pump And Fuel Lines (Naturally Aspirated Engine)
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 5.2. Loosen union nut on fuel high-pressure line (a/f 14) -2- .
3. 5.3. Screw off union nuts by hand. If this is not possible, the relevant fuel line must be replaced.
Remove high-pressure pump.
1. 6.1. Unscrew external Torx screws (E10, M6 x 25) -3- used to secure the high-pressure pump.
2. 6.2. Remove high-pressure pump.
  
  Fig 7: Identifying High-Pressure Pump With Cover
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. 6.3. Replace O-ring.
Clean sealing faces on cylinder head.