| Late post...But couldn't you just run a S54 OFH that has a t-stat built into it and use some of VACs oil line adapters (see pics). Thats what I used on my S52 E30. Oil temp never went above 210F. You just have to drill and tap the VANOS hole.
Last edited by fastjasonbmw; 01-11-2012 at 08:17 AM.