Join Date: Apr 2004
Location: Kelowna, B.C., Canada
Just thought I'd add some details about the way I went about this with my 1969 Spider and thanks again to the original poster for ideas!
I am not quite finished the install yet, but close enough perhaps to help others who may want to take this route.
I went with a Hayden Rapid-Cool 12" fan (part #3680-$60 at O'Reilly's Autoparts in Vegas) and mounted it similar to the OP as a puller fan (instructions with fan explain how to flip fan blade and reverse the polarity since it comes as a pusher setup by default).
Someone had asked about the specific brackets used to mount the fan - a little looking around got me an 8' piece of L bracket ($5) designed for use with suspended ceiling tiles -lightweight but strong, not perforated so had to drill holes at correct spots. With cutting and drilling, it mounted very securely to the studs for the original fan shroud, right up against the rad. On the passenger side of the rad, I just used some bendable thin bar stock oriented to avoid blocking airflow.
I wanted a fan thermoswitch in the bottom tank of the rad, so ordered the Alfetta/GTV switch from Classic Alfa (others carry it) and now was left with how to get it into the rad. I'm sure with enough looking I could have found a perfect fitting online, but I didn't want to wait. Locally no luck on a perfect fitting, but I made something work:
- a 3/4 NPTM x 3/8 NPTF brass fitting ($4) which I had drilled out on the 3/8 side to 13/16, then had tapped for the Alfa switch (M22x1.5, managed to find a machine shop with one), then hacksawed the 3/4 threads off, leaving a short, 1" diameter collar that could locate the bung in the 1" hole in the rad, then brazed in on the hex sides. This should allow me to get a thin wrench on the bung to tighten the switch in, without putting too much pressure on the brazed joint.
Pictures attached. I will update as I finish this in the next week and get the car on the road.
1969 1750 Spider (Euro)