Help on fixing this leak?

[tacoboy]

Ok heres the deal, i have a blowback PG-1. It worked fine for one day, and one day only. Now it is leaking past the valve somehow or another. I have tried three different cup seals, 1 of which was new. I removed the valve and replaced O-rings, now here is where my major question comes in. When I removed it I found that the posterior end of the valve (not the side with the cup seal, the striker side) had been tapped into during construction, and the brass set screw digs right into the posterior O-ring. When I reinstalled I replaced both O-rings and made sure to push the valve far enough back so that the set screw did not dig into the O-ring, however the leak persisted and I am 100% sure it is leaking past the valve. I oiled the valve and both orings thoroughly when I reinstalled it, was this wrong? Any other suggestions? Thanks.

[Lord Delta]

Did you check the orings on the striker? I had to replace mine just a little bit ago. Be careful you put your valve back in correctly. Sounds silly, but I know a guy who drained a 12oz tank because his valve was in backward. He couldn't figure out why it was leaking either.

[tacoboy]

Hmmm, didn't check the striker oring but air is not leaking out of the bottom tube but out of the top tube. I resurfaced the seal ring that the cupseal sits on (it was bad :mad: ) and it slowed the leak VASTLY, as it barely leaks now, not sure what else to try to get that last leg, maybe surface it with a finer grained sandpaper I guess.

[UTLadiesMan]

You've replaced the cup seal, but have you checked the seat where the cup seal touches the valve? If the valve gets scratched right there it will leak. If it's minor enough, a soft cup seal may do it (I think LAPCO used to make one), otherwise you may need to replace it.

[tacoboy]

Hehe yes I did check that, that is why I said I surfaced it, but I'm pretty sure it just needs to be surfaced a little more, thanks though.

[UTLadiesMan]

Ok, one more idea just popped in mind. Is your valve spring bent, crooked, weak, busted, cut, or crap?

[tacoboy]

Yeah it might be causing problems...not entirely sure.