I've been out of town for a little over a week and my rifle has lost 30 bar of pressure from the 480cc bottle. Is this something normal and expected, or do I have to find and fix a slow leak?
N/A Do PCP rifles normally leak a bit over time?
- Thread starter kwaping
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From what I've seen, heard, experienced, it's not normal. I've never had a leakdown unless it's a leak somewhere. check for leaks. 1/4 soap, 3/4 water to spray or real soapy sponge around all the edges. have paper towels handy. Have you done any work on it lately?
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It's only "normal" in the fact that ALL pcp's at some point in time, sooner or later, are going to leak SOMEWHERE. Whether or not it's normal for your gun depends somewhat on relevant factors. How old is it, how much has it been shot, ever noticed it leaking before, etc.? There are lots of posts here to learn from regarding tracking down leaks & their repair if you have to go that route. If it's new & under warranty it's not normal but happens far too often. How you want to deal with it is up to you.
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Thermal expansion and contraction can account for some pretty serious movement.
Not 30 bar tho. Buy a can of crc aerosol leak checker
Not 30 bar tho. Buy a can of crc aerosol leak checker
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None of mine (8) leak down, even over months. The only time I have had a leak, the issue fell under what Gerry52 described.
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I've got a pcp that's been been filled for over 8 years, been fired a few times and refilled, and hasn't leaked. And it's a tube gun.
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Dang, you all are confirming what I thought. Unfortunately it's a new gun, a Daystate Blackwolf. The only thing I've done that could be related to this is I took the fill nozzle completely out. I'll check that first.
It's definitely under warranty but I am not excited about the idea of sending it back to get checked.
It's definitely under warranty but I am not excited about the idea of sending it back to get checked.
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I don't really know what I'm doing, but I have a bottle of Snoop fluid. I put some around the threads of the fill nozzle, no bubbles. Same with around the air bottle attachment, the regulator gauge, and the bottle gauge. I assume that the bubbles would appear immediately if there was a leak?
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Never heard of CRC before this... Seems a messy, expensive way to test for leaks!
I use these with a bit of soapy water in them...
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lots of "it depends"
Was the gun outside in the heat when you last looked at the gage? thermal expansion, then stored inside = thermal contraction.
Did you fill your gun before you stored it, and then expect your pressure to be the same after the bottle / compressed air cooled off? never gonna happen.
or maybe all the above at play.
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I was degassing it to lower the regulator and wanted to be sure it was empty. And I don't know what I'm doing.
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loll ..leaks can happen to anyone ..mix a squirt of dish soap in a cup of water, use a qtip to swab it around things .. sometimes it takes a mi ute for the solution to reach 'critical bubble reaction' lol .. just keep an eye on it if its not immediately apparent .. also, when you reassemble things some actual silicone oil or grease makes things seat better .. a drop in the fill nozzle occassionally keeps that in good shape to ... id say its more common than not for a gun to slow leak down, but acceptable to me is 2800 to 2200 over several months .. not days ..
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Then you could have either nicked one of the o rings or maybe they didn't seat properly while reassembling. If the gun didn't leak beforehand then you now know exactly which seals to check. Use some silicone grease and lube the rings and reassemble the gun.
Also keep in mind that it's good practice to always lube the seals. You reduce the chance of them not seating well when you assemble the gun.
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That’s why I’m glad when I got serious about PCP’s I bought a Snowpeak PP700 and worked on that extensively before cracking open one of my premium PCPs.
The most rock solid PCP I’ve owned is a Kalibrgun, the 3-4 years I had it I never had to do anything internally. And it responded well to just HS adjustments.
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That's the point. It's not messy or reactive like soap can be. It's right there and ready for you to use before a forum post. It lasts forever and doesn't leave a residue. If more people knew of it the activity on agn might drop 20%
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A slow leak doesn't leak very quickly, a tiny bubble now and then is typical when one of my Streamlines was loosing 20 BAR over a week.
Some will be horrified, but I have found some very slow leaks by removing the stock and barrel, spraying the gun with a product such as Fluid Film, or LPS #2, and immersing the gun in water. Watch for a tiny bubble once the trapped air is released. I find that tapping the gun will release bubbles that are not leaks, just air stuck to the gun.
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