For all of you car enthusiast's out there, many probably own GM Trucks and/or SUV's with the Votrec V6 or V8 engines and plastic fans. My wife was on her way home in our 2000 S10 Blazer last night and had to exercise the beast when BOOM, this happened:
The car has 135,000 miles and obviously the Fan, over time, had become brittle and failed from fatigue, sending shrapnel all over the place. I even installed an underdrive pulley at 95K miles. Check out the hood, I am glad I was not leaning over the engine when this happened!
Lesson: Replace the Fan every 80 to 100,000 miles to keep this from happening to you.
Paul