I've noticed that you have just recently joined OCN, probably to get advice for this problem, so I'll do my best.
Shurik is probably right, the flexline is likely trashed. But not to worry, you can repair it with the right parts and skills - both are within your reach. However, this may be a good time to re-evaluate how badly you want to use this thing on your CPU. Like Duckie noted, an Xpressar is not meant for an i7 and certainly not an OC'd one. Perhaps if you repair the system you might consider adapting it for use one your GPU. Of course, note that a GPU has a rather high heat output as well but not as high as your i7. The unit may be more productive there.
Regardless of what you decide to do, I'm sure everyone here would be pleased to follow your repair log. Many members - not including myself however - can lend a hand for the very technical parts of the repair.
Oh, I will mention one more thing: that compressor you have is a unique thing as it is 12 VDC. This is not particularly special however it does add potential for a very stealthy setup. Just something to consider.
it might wokt but wont do it for long
another thing the condenssor is hella small the vapchill connys at under the ice are 2 times bigger
to repaire the unit ur self ur looking at easely spending 150$+ on just tools then supplys wich are not cheap to just fix it it might cost u around 300$ to do it ur self most hvac tecs wont touch it and half of the ones that are willing to do the work will try to tell u the compresor is bad so they can sell u a new compressor
u can try geting a hold of a phase system builder in ur area and see if they would be willing to fix it /upgrade
the thing will need an new condenssor 80+$ then a cap tube resize and leak test leack repaire purge and fill
after all that dont expect to be going -54c it might hold -20c at load and thast best case worst case its under powerd and wont last long