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Hi, my cayenne turbo has an error in one of the a/c flaps as per durametric. In addition to fixing it, i am planning to do a heater core bypass as well. I live in a tropical country where temeratures are always 90-95F year round with very high humidity so i will never need the heater. If any one can help me with the bypass, it would be greatly appreciated.

Thanks in advance

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  • 1 year later...

The heater core pipes are located in the front drivers side wheel well behind the liner. The coolant after run pump is located here as well. I can take some pics for you tomorrow but you will jeed to bypass the core at this location so that your coolant after run pump still circulates as intended. The after run pump also supplies the core with warm water after your Cayenne is shut off and the climate control is set to "rest". 

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Hi, thanks for the reply. If you can also mark where i can cut and loop the pipes so no coolant will enter the core would be of great help. Heaters have really no use on our part of the globe.

2004 cayenne turbo
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You could have some different stuff going on here depending on whether you have the auxilliary heater or not and your vin #. But irregardless there will be two alum pipes going into the firewall behind the upper control arm. Those go to the heater core. Simply detach and loop the feed and return eliminating the core feed from the circuit. 


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Thanks guys, mine is just the 2 zone so much simpler. Will be doing this when i get home.also thinking if the capacity of the coolant will have an effect on engine temp. will do some experiments.

2004 cayenne turbo
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