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barb wont stay tightened, help with slow leak

post #1 of 11
Thread Starter 
So I need some serious help...I just filled my first water loop for the first time and I have a very slow leak coming from the cpu block. the first thing I checked was the barbs, one of which was loose. I know your not supposed to use a wrench but whether I tighten it by hand or with a wrench it wont stay tight and I can watch it unscrew itself. its almost as if the tubing is on so tight that it just bends and pulls the barb looser with it.

suggestions?? please?
post #2 of 11
if tubing is bent and starts turning it will unscrew something! also! is the oring ripped on the barb.!
post #3 of 11
Thread Starter 
well the tubing isnt bent, for lack of a better word I feel like its what's unscrewing the barb. it seems twisted and I think the oring is fine. I was kinda wondering of there was a way to tighten a barb once water is already in the loop :/ it seems to unscrew itself right before my eyes
post #4 of 11
You probably have the hose twisted a bit. You will need to unclamp the hose to fix it.
Grog
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Grog
(21 items)
 
TC Folding Gimp
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CPUMotherboardGraphicsGraphics
i7-950 Asus P6X58D-E Asus ENGTX470 BFG 9800GT 
RAMHard DriveOptical DriveCooling
Corsair Dominator GT Velociraptor 3000HLFS Lite On DVD burner EK Supreme HF 
CoolingCoolingCoolingCooling
AquagraFX470 EK FC-88 Koolance RP402x2 MCP35x pumps 
CoolingCoolingOSMonitor
Phobya Extreme 200 and Quad 480 radiators. 9x Akasa Viper fans Windows 7 Ultimate Old LG Flatron 1680x1050 
KeyboardPowerCase
Logitech G15 + Logitech G13 game pad Thermaltake 850W Corsair 600T 
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Phenom x4 9650 Cheap MSI board EVGA GTX580 SC Junk PC-800 DDR2 
Hard DriveOptical DriveCoolingOS
WD Blue Generic DVD Cuplex Kryos HF CPU block, Swiftech MCW82 GPU b... Windows 7 Home Premium 
PowerCase
Antec True Power 650W >10 year old Antec something or other. 
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post #5 of 11
Thread Starter 
thanks! trying that right now but its 7/16th over 1/2 in barb so its on tight. id hate to have to tear everything down
post #6 of 11
You're going to have to drain the loop, remove the tubing, and re-tighten the barb. Tighten the barb as much as you can with your fingers and use a wrench to turn it just enough so that you can't loosen it with your hands (in my experience, it takes a bit less than a quarter turn).

The tubing is storing enough tension to twist the barb free. Even if you get it to stop leaking without dismantling, the tubing is still storing some tension and it may be enough to cause the barb to break free some day. Do you really want to cut corners and risk damaging your hardware?
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Black Box
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post #7 of 11
Thread Starter 
so I got my tubing kinda rolled up and I blame that for the tension...does it always come this way?? get ur point about bein safe...is the assumption that tightening the barb more with a wrench wont allow the tension in the tubing to ever break it free?
post #8 of 11
The wrench is used to provide a bit of extra torque to get the barb just a bit passed hand tight (note I said "just a bit", over torquing isn't a good thing). If you can't loosen a barb with your bare hands, it's unlikely that you'll accidentally loosen the barb while forcing your tubing on (probably happened to you) and even more unlikely that the tubing itself will break the barb free.
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post #9 of 11
Try this:

1) Clamp onto the exposed metal of the barb with some vice grips and hold with one hand
2) Remove the hose clamp if you've got one installed
3) Twist the tubing counterclockwise with the other hand

If you have trouble with the tubing being too tight, try heating it up with a heat gun or hair dryer and rub some oil/water into the seam at the end of the tubing.
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Davs Jr.
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post #10 of 11
Thread Starter 
thanks davs! +rep that worked like a charm The barb is tight now, the tube is torqued, and I didn't even have to tear down my loop
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