Out of the 2 Series II ssei'* I've owned recently both of them have had blown supercharger gaskets.
Let me elaborate. When I saw blown, I mean that the gasket was not changed when the supercharger was removed. On my 98 it had a horrible idle and had no power due to a huge chunk missing of the gasket. On my 01 which I pulled appart earlier this morning I noticed it was cracked with part of it missing near where the o-rings are. That explained the hiss I was hearing. about a 1/8th inch crack from the main outlet to the rear. The more discouraging part about this whole ordeal is the fact that the 01 has never been anywhere but the dealer for repairs (I have full repair history from the previous 2 owners). I dont know about the 98 but I guess dealers dont always replace the supercharger gasket when they do top end work.
anyone else run into this?