fitting rear ac?
#2
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I don't know of anyone who's added it to a car. A couple of guys have removed the rear ac. And that can be quite a challenge. Otherwise I would have removed mine long ago.
#3
Electron Wrangler
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Err - I wouldn't even think about it... it doesn't boost total cooling in worst case conditions... it can cool the car faster in cases when the compressor & condenser aren't the limiters - but that's not when you really need it....
Overall I think it was more marketing gimick than an elegant engineering solution -controls are also rather prooly integrated with the front system IMO.
Alan
Overall I think it was more marketing gimick than an elegant engineering solution -controls are also rather prooly integrated with the front system IMO.
Alan
#4
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This is actually an amusing exercise in PETting. To install rear air, you need every piece on this photograph (page 338 of the '87-91 PET), plus a different center console insert (928.552. 047 09, for the M570 option), and the rear console piece and associated grilles (Second picture, page 277) . I don't know if the dash wiring harness in a non-rear A/C car already has the wiring/connections for the rear blower control and switch in place or if you'd need to add those too. There's also a drain hose for the rear evaporator that I don't see on this diagram.
A whole basketcase donor car would probably be cheaper than all these parts bought individually.
Oh, and the engine needs to come out to install pipes #1 AND 2 on the PET diagram below. #1 can be done with the engine in, #2, no way.
In other words, a complete PITA.
![](https://webfiles.uci.edu/redwards/public/rear%20AC%20diagram%20from%20PET.jpg)
A whole basketcase donor car would probably be cheaper than all these parts bought individually.
Oh, and the engine needs to come out to install pipes #1 AND 2 on the PET diagram below. #1 can be done with the engine in, #2, no way.
In other words, a complete PITA.
![](https://webfiles.uci.edu/redwards/public/rear%20AC%20diagram%20from%20PET.jpg)
![](https://webfiles.uci.edu/redwards/public/rear%20AC%20console%20pieces.jpg)