Removing Heat Exchanger

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.

NOTE: Danger of slipping due to emerging coolant

The emerging coolant will make the floor of the workshop slippery and may cause people to slip and fall over.

→ Collect emerging coolant in a suitable pan.

Information

Make sure that coolant does not soil the passenger compartment.

Protect seats and carpet with protective covers.

Disconnect electric plug connection -1- above the additional air conditioner.

Fig 1: Disconnecting Additional Air Conditioner Connector
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Carefully unclip locking lugs for the air guide -3- on the additional air conditioner.

Fig 2: Loosening Locking Lugs For Air Guide
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Lift up additional air conditioner -1- and pull off water drain hose -2- .

Fig 3: Identifying Water Drain Hose
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Carefully tilt additional air conditioner to the right and be careful with the flexible coolant hoses.
Clamp off coolant hoses -1- using hose clamping pliers Nr.192 .

Fig 4: Clamping Off Coolant Hoses On Additional Air Conditioner
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
NOTE:
Danger of scalding
- Coolant can be very hot.
- Coolant may be pressurized.
→ Only remove the heater when the cooling system has cooled down.

→ By carefully opening the catch on the reservoir, make sure that the cooling system is depressurized.
Disconnect coolant hoses at the heat exchanger.
1. 6.1. Loosen spring band clamps -1- at the heat exchanger using assembly pliers Nr.72 Pos.1 and disconnect coolant hoses.
Disconnect electric plug connection -3- at the servo motor -1- and move wiring harness -4- above the heat exchanger aside.

Fig 5: Removing Servo Motor On Additional Air Conditioner
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Loosen upper fastening screw -2- on the servo motor -1- .

Fig 6: Removing Servo Motor On Additional Air Conditioner
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Loosen fastening screws -2- on the cover -1- of the heat exchanger and remove cover.

Fig 7: Removing Heat Exchanger Cover
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove heat exchanger.