The Zalman does NOT have the capability to cool an i7 CPU. No matter what the high payed marketers who got you to buy it in the first place. Under load you need to be able to remove 250 watts of heat. You can't do it with a vertical tube of aluminum.
You can buy the W5 CPU block. And might as well buy a new few hundred $$ tube and put them in series, you will need it.
The pumps in the Z's are known for early failure. It's a piece of junk. You might as well buy a top WC pump for WCooling. Laing D5 (aka MCP 655) and stop relying on the Z pump.
So. I have expanded on Shadows input. You might consider sending the Z back if you can and start over with the Sticky link at the top of this forum. Wish you saw it first, I almost made the same mistake, but I spent 3 months researching before I made my decision of what was right, and what was junk. Zalman is junk.
My rig now, wasn't like this when I began watercooling.http://www.overclockers.com/annual-water-cooling-cleaning-rebuild-journal/