If you remove your supercharger from the car after the plates have been in use. Say for example to have the charger ported. When re-installing the supercharger the o-rings and plates need to be correctly cleaned of oil.
How to clean the plates and o-rings:
For some mechanics what is listed below is what you have/are probably already doing as you know how to handle oily o-rings, with that in mind not everyone knows how to handle this so we will explain how best to clean them.
During engine operation oil build up on the plates is not an issue, as the weight of the blower and tension of the bolts are holding all O-rings in place and sealed tightly, only when the plates are removed and tension is removed from the O-ring the oil sitting beside the O-ring can get under the O-ring inside the O-ring grove.
What needs to be done is you need remove the O-rings from the spacer plates and clean the O-rings, brake clean the groves on the spacers then wipe the plates down, soapy water is also fine.
Ensure the spacer is completely clean of oil and dry before re-installing.
Brake clean and wipe down the cylinder heads, then carefully try to line up the blower on to the cylinder heads without having to align it many times as there is the possibility of O-rings being pulled out from their O-ring groves rolling and crushing the O-ring causing a leak during the install. You should be trying to lower the blower directly down on to the heads, not down and then moving it around a lot which can result in the O-ring rolling out of an O-ring grove.
This service measure is to ensure the plates, O-ring and O-ring groves are free of oil which will cause any possible re-install issues from happening.
Summary
This is not required on the initial install as the plates, o-ring and o-ring grove are all oil free at this point, only the blower and cylinder heads should be wiped down and free of any oil.
With that in mind if removing the super charger from the car after the plates have been in use, ensure you clean your o-rings, plates and o-ring groves of any oil before re-installing.
Thank you Forced Induction Interchillers.