Removing Coolant Regulator Housing

→ Avoid contact with caustic fluid.

→ Wear personal protective gear.

→ Ensure that there is good ventilation.

→ If you do come into contact, wash off immediately with plenty of warm water and contact a doctor if necessary.

1. Pull off coolant hose -1-  at the left-hand side of the engine compartment.
   1. 1.1. Remove spring clamp -2-  and pull coolant hose out of the coolant regulator housing.
   2. 1.2. Re-fit spring clamp.
   3. 1.3. Check O-ring on the coolant hose and replace it if necessary.
      Fig 1: Identifying Left Coolant Hose Of Engine Compartment

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Remove coolant pipe -1-  for the thermal management bypass valve.

   Collect emerging coolant in a clean container. 

   1. 2.1. Remove screw -2-  .
   2. 2.2. Open the spring band clamp -3-  and pull off coolant hose -4-  .
   3. 2.3. Pull coolant pipe off the coolant regulator housing.
   4. 2.4. Replace O-rings.
      Fig 2: Identifying Lower Coolant Pipe Screw And Clamp

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Remove screws securing coolant pipe to coolant pump and coolant pump holder.
   1. 3.1. Unscrew one screw -1-  on the coolant pump holder.
   2. 3.2. Unscrew three screws -2-  on the coolant pipe.
      Fig 3: Identifying Screws On Coolant Pipe And Coolant Pump Holder

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Remove coolant pipe -1-  at the coolant regulator housing and remove the housing.
   1. 4.1. Unscrew screws -2 + 3-  on the housing.
      Fig 4: Identifying Screws On Coolant Pipe To Coolant Regulator Housing

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   2. 4.2. Unscrew screw -2-  on the high-pressure pump heat protection panel.
      Fig 5: Identifying Screw On Coolant Pipe Holder To Heat Protection Panel

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Pull coolant pipes off the coolant regulator housing.
   1. 5.1. Pull off coolant pipe at the side -1-  .
   2. 5.2. Pull the housing to the rear in order to remove the front coolant pipe -2-  .
   3. 5.3. Replace O-rings -3 + 4-  and molded seal -5-  .
      Fig 6: Pulling Coolant Pipes Off Housing

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.