Removing Water Tube For Auxiliary Heating - Water Tube From Directional-Control Valve To Second Heat Exchanger

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Water Tube Installation Position

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Unscrew fastening screw -2- and remove water tube holder -1- .

Fig 2: Identifying Water Tube Holder Fastening Screws
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Drill out blind rivet -1- at the water tube.

Fig 3: Identifying Water Tube Blind Rivet
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Remove water tube holder.
1. 3.1. Screw off both fastening nuts -1- .
2. 3.2. Unscrew fastening screw -2- .
3. 3.3. Remove water tube holder -3- (-arrow-) .
  
  Fig 4: Removing Water Tube Holder
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Loosen water tube at the heater.
1. 4.1. Undo spring band clamp using assembly pliers for spring band clamps, Cayenne hose connections Nr.72-1 (-arrows A-) and push down off the adapter -arrow B- .
2. 4.2. Pull water tube down at the heater -arrow C- and remove water tube.
  
  Fig 5: Loosening Water Tube From Heater
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Unscrew fastening screws -1- on the heater.

Fig 6: Identifying Heater Fastening Screws
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Loosen water tube on directional-control valve at the top.
1. 6.1. Loosen spring band clamp using assembly pliers for spring band clamps, Cayenne hose connections Nr.72-1 (-arrows A-) and push it down off the connection -arrow B- .
2. 6.2. Pull water tube off the directional-control valve -arrow C- and remove it.
  
  Fig 7: Loosening Water Tube On Directional-Control Valve At Top
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.