Installing Oil/Water Heat Exchanger

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Remove stoppers.
Clean sealing faces and replace sealing rings (2 ea.).
Install oil/water heat exchanger.
1. 3.1. Fit oil/water heat exchanger -1- on bracket for oil/water heat exchanger.
2. 3.2. Fit and tighten six internal Torx screws (T30) M6 x 20 -2- .
  → Tightening torque: 10 Nm (7.5 ft. lb.)
  
  Fig 1: Identifying Oil/Water Heat Exchanger Fastening Screws
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Information
- Always perform a leak test in the high-pressure area after opening the fuel system.
- This is particularly important if components are disassembled and replaced.
- The threaded connections of the fuel lines must be coated with OKS 1710 lubricant (Part No. 000.043.303.27) before being screwed back on again.
- Always allow a drying time of 60 minutes for the lubricant!
- Blow residual fuel out of the lines and high-pressure pump (into a fuel-resistant container or cloth) using compressed air before installation.
- The tightening specifications must be strictly observed.
Install high-pressure connecting line.
Observe tightening specifications:

→ 243019 REMOVING AND INSTALLING FUEL COLLECTION PIPE WITH FUEL INJECTORS - TURBO - section on "Installing"
1. 4.1. Position the high-pressure connecting line -1- between the fuel collection pipes.
2. 4.2. Fit and tighten union nuts -4- .
  → Tightening torque: 20 Nm (15 ft. lb.)
3. 4.3. Secure holder for the high-pressure connecting line by screwing in and tightening two external Torx screws (E10, M6 x 16) -2, 3- .
  → Tightening torque: 10 Nm (7.5 ft. lb.)
  
  Fig 2: Identifying High-Pressure Connecting Line
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Fit hydraulic return line.
1. 5.1. Insert hydraulic return line -3- into the holder on the oil/water heat exchanger.
  
  Fig 3: Identifying Hydraulic Lines
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 5.2. Connect hydraulic return line to the reservoir for the hydraulic pump -arrow- .
  
  Fig 4: Connecting Hydraulic Pump Return Line
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Information
- Grease O-rings, hoses and lines in the cooling system with Kluberplus Gel (Part No. 000.043.205.93).
Fit two coolant hoses -1- at the oil/water heat exchanger.
1. 6.1. Secure four spring band clamps.
Fig 5: Identifying Oil/Water Heat Exchanger Coolant Hoses
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Install secondary-air line -1- .
1. 7.1. Clip in line at the secondary-air valves and connect hose to the secondary-air pump.
  
  Fig 6: Identifying Secondary-Air Line
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Route and clip in positive crankcase ventilation line -1- (-2- ).

Fig 7: Identifying Positive Crankcase Ventilation Line Clip Position
Courtesy of PORSCHE CARS NORTH AMERICA, INC.