I had a question: Can I use this late 2.0 fan on my early 1.7? A search didn't yield much, and most of the responses I got was "I dunno, it should work".
Well here is what I found:
I had an early 1.7 that was missing way to many fan blades for me to want to use:
Here is the front of the early fan and the factory screw (note: this uses the same wrench as the factory CV bolts do):
The early fan and factory bolt has an 11mm contact surface once it exits the fan:
I wanted to measure the depth as well, just to be sure. 20mm:
The only other measurement I could think of was this one: