Have you double-checked the pouring temp of your flourinert? This project was done once already, and the person who did it had the flourinert freeze on them, so they couldn't pump it.
3M shows pouring points between -25 and -101C, depending on which stuff you buy.
You may want to check out
3M specialty fluids: Flourinert
Hope that helps.
__________________
Everything aircooled
(I honestly don't know why you guys let me stay a member...
)
Always folding:
WXP Pro:
KD7R + Palomino 1800+
W2K3:
4x P3 Xeon 500 512KB (4 clients)
Linux boxes:
none
Had to put them to use doing *real* work.