Broemp

check with bequiet for warranty, are you sure its dead? do you hear anything when its plugged in? I thought my aio was dead once, but it just had an air bubble in the pump. EVGA cust service told me to just shake it very hard and plug it back in and its worked since. after that I changed how my AIO was instaleld to prevent air bubbles. 

Yes and no. It really depends on how the parts are connected.
 
Some aio's use rads where the pipes are screwed into others use other ways that are not compatible with fittings. Really the only way to know is try.
 
Either way even with recycling parts it will be cheaper to get a new cooler.
 
The scythe fuma 2 a 60$ cooler performs like your bequiet in terms of noise and cooling performance.