I dont know this car at all, but as a mechanic, I would say that the springs of the thermostat go to the HOT side of the line, IE, then engine side would get the springs, and the rad side would get the other side. IF the springs are surrounding what looks like a chunk of brass (this is the unit sensing the temp)
This is only a guidline as I have NO experience with BMW except my 84 318i
See the #90 DIRT 318i @ www.facebook.com/brewstermotorsports
DIRT is for racing, Pavement is for getting there. The only way to turn left, is to turn the wheel RIGHT!!
Locked Your DIff and hate it?
Give me a shout, will buy em up cheap, DIRT tracks are the ONLY place for a welded diff!!