Hi Ryan, recently had one of my motors start to squeal, here's a procedure of what I did to fix it. Might help you to free up the motor and get it going again.
I don't know it this will work, but here goes.
Temporary Fix for a Squeaking Forward Air Conditioning Fan Motor
Recently while driving my RSA on a Back Country Tour it was hot enough that I decided to turn on the Air Conditioning. During the initial cool down with the fan set in position 4 all was working great. When the temperature was lowed to a comfortable level I shifted the fan speed to position 2. Within a few minutes I started to hear a low squealing coming from the a/c fans. Sounded like the bearings in the drivers side fan motor. Very annoying to say the least.
When I arrived home, I removed the front trunk cover that covers the a/c module and took a look at the fan motor using the Porsche Pet Parts Manual as a guide. The fan in question was quite buried to say the least. I called the local Porsche Dealer for a price on a new fan motor and the quoted price was $560.
I’ve had some experience rebuilding 12vdc motors and know of a few shops in town that I’ve used before to rebuild 12vdc motors. With a prohibitive replacement cost of $560, I planned to remove the fan and rebuild it. I found a 993 a/c evaporator procedure on line
http://www.p-car.com/diy/ac , this reference had a lot of great information, but required the removal of the hood, gas tank, fuse box, a/c module, etc. Definitely further than I wanted to go.
The driver’s side fan motor has the a/c line routed very closely over the fan motor cover. I also didn’t want to have to drain down and recharge the a/c system, the question was will it move enough to get the fan cover off.
1. Remove a/c compartment cover.
Remove 2 a/c hose mounting clamps.
2. Remove 4 silver clamps holding the fan motor front cover in place. Use a long thin screwdriver and a magnet to catch the clamps.
3. The fan motor cover is ready to be removed. Using just your hands, pull the a/c hoses out of the way and remove the fan cover by pulling upward. Not really easy, but it will come out.
Note: There are 2 T20 torque screws holding the fan motor in the a/c module, the fan motor impeller is notched for access to the screws. You can not see into the fan impeller to see the screws, you have to use a mirror. Do Not remove these screws. I removed the screws to get the fan motor out, the fan motor is wedged into the module and further disassembly of the module is required. I’m still working on how to do that without major component disassembly.
4. Using the syringe filled with oil, inject a few drops into the front fan motor bearing. Turn on
the motor at low speed and run for a few minutes. Stop the motor and inject a few more drops of oil into the bearing, test again, you’re done. I used Caterpillar Penetrating Oil with Moly p/n 1U-8265.
5. Replace all parts in the reverse of disassembly and the squeaking is gone for awhile. So far I’ve run the motor over 48 hours at low speed with no squealing.
Note: Use double sided tape on your fingers to hold the silver clips for installation. Place clip on the tape, position on a/c module flange and push, they pop into place. A arm with 3-4 universal joints would be helpful.
Well, it got all the text, didn't get the pictures. Hope this helps.
Good Luck, Don