Ok, If you can't fit one in the housing, take your radiator to the raditor shop and get them to solder in a mount for your sensor shouldn't cost more than $30 or so to do. I was able to run a the mech fan with my raditor, but I had to chop the lip that sticks out of the raditor mount panel top( the bit that bolts on the top of the ta22 raditor support pannel thing) off and then the raditor mounts flush on the raditor support pannel. But it all depends on the raditor you use of course mine is a RA23 item I think.