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View Full Version : Small barrel leak

XtraBoy
03-03-2005, 07:37 PM
Is it a lube issue?

HPR should be fine, pretty sure LPR is fine... anyone got any ideas?
bullschmidt2k3
03-03-2005, 07:51 PM
that happened to me once... I thought it was leaking about the barrl... turned out it was my guage, and I'm just stupid and couldn't tell where the leak was coming from...


then the guage blew up and almost killed me... :woah: well, not quite..but ti scared the shit outta me...


:mohawk1gu
Edwin
03-03-2005, 07:54 PM
What type valve?

The only way air can get into the barrel is through the valve cup or the valve orings. Maybe just an oring or oring lube.
XtraBoy
03-03-2005, 08:03 PM
stock valve... probably lube.. i'll probably just play with it...
bullschmidt2k3
03-03-2005, 08:05 PM
I don't know about electro pneumatics, but with blowback, a leak out the barrel almost ALWAYS means a bad cupseal... lube might help though
Edwin
03-03-2005, 08:07 PM
Stock valves (cup seal) are horrible. I think Haveblue has some cup seals for the stock valve, or maybe just get a new valve stem and seal. I have had more stock valves leak than hold air.

Let us know what you find.
Edwin
03-03-2005, 08:09 PM
I don't know about electro pneumatics, but with blowback, a leak out the barrel almost ALWAYS means a bad cupseal... lube might help though

On a stock valve there are only three ways for air to get to the ball.
1. Cup Seal
2. Front Valve Oring (AOC/LPR side)
3. Rear Valve Oring (If it is coming from this one you have a serious problem)

Most likely 1 or 2
Have Blue
03-04-2005, 01:10 PM
In some cases a dinged valve face can also be the culprit - when porting out valves, I generally make a light facing cut on the front to the valve to clean it up. NW cupseals are excellent and highly recommended.