For some reason, Z3 2.8's have a radiator with a seperate expansion tank, unlike the 1.9 that has a standard E36 rad. The 328i rad with expansion tank seems to sit in the mounts and the fan shroud fits to the E36 rad perfectly. It involves a couple of E36 hoses and it'll be up and running in an hour. I made my £400 bid but she declined and got me to fix it, the bitch.
Edit: It's bloody tight to the airbox though - looks like an E36 one is going on.







