Removing Coolant Regulator Housing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Loosen clamps -arrows- and pull off coolant hoses -1 - and -2- .
1. 1.1. Soak up emerging coolant with a cloth.
  
  Fig 1: Locating Coolant Regulator Housing
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Loosen the vent line on the cylinder heads.

Fig 2: Loosening Cylinder Heads Vent Line
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 3: Removing Vent Line
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 2.1. Unscrew and remove fastening screws -1- .
2. 2.2. Remove vent line -2- .
Remove wiring harness screws on the cylinder heads and at the water guide and loosen the wiring harness. → see Fig 4

Fig 4: Removing Engine Wire Harness
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Disconnect coolant pipe -4- , pull it forward and set it aside.
1. 4.1. Unscrew screw -3- and pull off coolant pipe -4- .
2. 4.2. Soak up emerging coolant with a cloth.
  
  Fig 5: Identifying Coolant Return Line
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Unscrew the screws on the coolant regulator housing -2- and loosen coolant regulator housing -1- by pulling it upwards. The coolant pipe -1- (bottom figure) remains fitted in the coolant regulator housing.

Fig 6: Identifying Coolant Regulator Housing
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 7: Identifying Coolant Guide
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove the two coolant hoses from the coolant pipe behind the cable duct (figure shows several coolant hoses). → Coolant line Remove coolant regulator housing with coolant pipe.

Fig 8: Identifying Coolant Line
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Disconnect coolant regulator housing and coolant pipe if necessary. Replace sealing rings.