2002 Boxster S squeal

[Twin headlight Ernie]

I pulled the secondary injection pump on Saturday. I bench tested it with a 12 volt battery and some test leads to listen to how loud it was. I removed the rear cover and cleaned the foam filter with some light air pressure. I'm sure higher pressure would blow it to pieces. I was able to part the two section by removing the spring clips. There are two stacked fan blades which come off pretty easy. That's where the fun ended. I was not able to take it apart any farther. I was hoping to get access to the shaft and bearings but it seems to be a sealed unit at that point. I put it back together and bench tested it again. it sounded much better. Maybe cleaning the restricted filter helped. I put it back it the car and will see how it sounds in the spring. If it still bugs me I'll pickup a new one or hunt down a used one. It's a pretty easy swap. It took longer to get to it than it would to do the R&R.

Thanks for the help guys.
Ernie