Underwater leak test, DON'T!

I've seen several posts mentioning that dunking your air rifle or pcp underwater is okay if you do it quickly and dry everything properly.

My advice is, just don't.

A coworker dropped off a Hatsan Jet 2 .22 because his gun leaks about once a month. He doesn't ever use it, but when he thinks to do so it's down to to almost empty. He gave the gun to his boss who offered to leak test it and fix it for him..well, needless to say that although he was reassured it wouldn't rust, that as not the case. Also the leak was never fixed, because it's in my hands now. Well, it's at the house, I worked on it this morning, cleaned it up, changed a few seals and removed 98% of the rust. But just see for yourselves.

I'm not sure why the gun was dunked under water for a leak test when there no where for the air to escape aside from the aurtube and valve assembly which is forward of the trigger area. I found the leak to be coming from the bottom flathead screw, and I also found a mangled oring where the valve plate seals up against.

After clahing the seals, cleaning up the guns polishing parts, and lubing it all up, it was holding air. Now to wait and see if it holds up.

The only part remaining with a bit of rust is inside the barrel, I went through 17 patches front and back and there is still some residual, I need to get a nylon brush and scrub it out with the boroclean I have.

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Dunking a pcp in water to check for leaks is like kicking someone in the chest to test for heart murmurs.

These guns rust if you so much as sneeze near them and don’t wipe them down extremely thoroughly after. Not to mention all the nooks and crannies water can pool in.
That's what I'm saying, I've seen what happens to higher ends rifles falling into a pond two of my other coworkers dropped the FX rifles in them when the golf cart tipped, but they weren't anywhere as bad as this.
You did an awesome job cleaning it up 👍
Thank you!
Almost like it was dunked in salt water. Nice clean up though. Good save!
Yeah it definitely looks that way, thank you!
 
I really appreciate this post as I have a Leshiy Classic with a tiny leak that I have not been able to track down even after a full reseal on d the gun and reg.

I had been contemplating a water dunk but had rust concerns. Is there a different liquid that might be safe to dunk in? Alcohol maybe as it will evaporate.
 
I really appreciate this post as I have a Leshiy Classic with a tiny leak that I have not been able to track down even after a full reseal on d the gun and reg.

I had been contemplating a water dunk but had rust concerns. Is there a different liquid that might be safe to dunk in? Alcohol maybe as it will evaporate.
Glad you asked, the LC don't have many places where they can leak from. Have you looked at the old Edgun West Videos? Does it have a slow leak or fast leak? Does it leaked to empty or does it stop at a certain psi?
 
I really appreciate this post as I have a Leshiy Classic with a tiny leak that I have not been able to track down even after a full reseal on d the gun and reg.

I had been contemplating a water dunk but had rust concerns. Is there a different liquid that might be safe to dunk in? Alcohol maybe as it will evaporate.
It’s probably the gauge. Not the gauge oring, the gauge itself. Been there with my Leshiy. And yes, I dunked it. It’s not a Notos.
 
what i see is common sense or lack of
would i dunk part of a gun in water sure, i have done it with Daisy 717 that misbehave but only the valve area and the damn thing was dried afterwards
you are a man that has much patients to repair that nightmare
where did COMMON SENSE GO
I wish I knew, I can only assume the guy never actually truly dried it off. If he did, he clearly only wiped off the excess water from the outside.

We both work for the same company doing iguana removal, and I am the field training officer for the team, so I train new personnel, and work on the air rifles whenever palm beach air guns is too busy or backed up.
 
Nice job cleaning that up!
Why you would put the entire gun in the bathtub escapes me, but if you did, why wouldn't you take the thing apart and dry/clean/lube each part? And then, while you've got the damn thing apart, wouldn't you replace the seals when you put it back together? Why not skip the dunk altogether, tear the gun apart and replace all the seals?
I could see (possibly, for the most stubborn of leaks) dunking the pressure bearing parts in a bath of hot water to pinpoint the part and location of a leak that may be caused by a more serious sealing surface imperfection or damage. Hot water evaporates more readily than cold water, and testing only the parts that you need to would cut down on a lot of that damage. Definitely would be my last-resort option though as 99% of leaks are resolved by replacing all seals.
 
I’ve said it before I’ll say it again- sone people, no matter how much $$ they have, shouldn’t be allowed to own a pcp.
Sometimes as a very last resort dunking is required but know full and well the entire gun areas that got wet will need a complete disassembly to dry the gun, remove tainted lubes and add fresh lube. Isolate the dunk so only HPA areas go in the water. A trigger should never be put under water as an example