These are the steps I took to disassemble my compressor unit and apply some liquid silicone sealant to keep the motor plate from twisting with respect to the compressor housing. I don’t know how other compressor units were assembled, but my compressor had the motor plate, to which the motor and compressor wheel are mounted, held in place by the friction of a black snap ring.
I used a bicycle spanner to remove the snap ring, which ended up doing the trick, but I needed vice-grip plyers to sufficiently compress the snap ring.
http://www.ft86club.com/forums/attac...1&d=1480188921
The motor and compressor housing move freely with the snap ring removed and are easily separated; however, it is a tight fit so I proceeded slowly to keep the compressor wheel from hitting the inside of the compressor housing.
http://www.ft86club.com/forums/attac...1&d=1480188921
http://www.ft86club.com/forums/attac...1&d=1480188921
With the motor separated, you can see the mating surface of the motor plate and compressor housing where the sealant will be applied.
http://www.ft86club.com/forums/attac...1&d=1480188921
http://www.ft86club.com/forums/attac...1&d=1480188921
I cleaned the motor plate and compressor housing mating surfaces with rubbing alcohol (70% isopropyl alcohol solution). While I was at it, I also cleaned up the inside of the compressor housing as it had an oil film. Something I though was interesting was the fact that the interior of the compressor housing appears to have little pits all over the place (see previous pic). Assuming my air filter is doing its job, I’m not exactly sure what is causing this. Perhaps others can report whether they observe this too. With the mating surfaces clean, I applied a ~1/16” bead of JB Weld red RTV silicone sealant to the compressor housing mating surface. The sealant was a little difficult to apply evenly along the surface so I ended up wiping off the excess with my finger taking care not to get any on the interior of the compressor housing. Doing resulted in a fair amount of excess sealant getting pushed into the groove where the snap ring seats; however, I ended up cleaned out that groove after reinstalling the motor plate. With the sealant evenly applied to the compressor housing mating surface, I carefully reinstalled the motor plate and gently pressed it into the compressor housing with a slight twisting motion to spread out the sealant. After the motor plate was installed I let the sealant cure for a few hours and found that it was already held firmly in place. The following picture shows the end result.
http://www.ft86club.com/forums/attac...1&d=1480188921
I reinstalled the snap ring and let the unit cure for 24 hours before reinstalling in the car.