post #11 of 11
Yeah I think most of this is just a slight expansion and flex of the tubing. Placing your T-line right before the pump is important so you pretty much eliminate any negative pressures in the system. The only time I've seen anyone have problems with negative pressure is when they had an extremely long feed line between the reservoir or Tee line to the pump inlet in which the tubing actually collapsed.

And if it makes you feel better you can open the cap and seal it up right after starting when it's still cold.
    
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CPUMotherboardGraphicsRAM
3930K ASrock X79 Ext7 Evga GTX570 CORSAIR Vengeance 16GB 
Hard DriveOptical DriveOSMonitor
Phoenix SSD+2TB Seagate drives ASUS DVD-RW combo Windows 7 28" Hanns-G HZ281 
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