I remember having one do that to me. Don't remember the brand tho'...
I had to make a heavy gasket - or made a shim plate with gaskets - can't remember which.. but we did get it to clear finally.

It was on a sunday afternoon and we just wanted to continue with assembly, it worked out in the end, all the pulleys lined up but it really drags down the job. I'd have been upset if it was for a paying customer! I'll guarantee you the parts store won't pay for the lost time and trouble!! :-)