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CO2 cartridge leaks down in seconds in a crosman model 357 (older model six shot)

Can anyone help us trouble shoot this?
thank you, frank

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  • 5 more comments 
  • sparrow6410 Apr 01, 2008

    my crossman seems to go through gas quite quick is this a normal thing

  • Anonymous Mar 19, 2009

    i do have the same problem...i had this gun in closet for over 10 yrs..i thought i'd get it out and teach the kids how to shoot it..i put a new co2 cartridge in and it leaks out in a matter of seconds..leaking do i fix this...are the seals dried out..maybe it just needs oil???...where do i get it if it does..

  • studio357 Mar 23, 2009

    exact same as frank's - new c02 cartridge simply leaks all gas when loaded on crosman 357 when the key is turned...?

  • Anonymous Mar 26, 2009

    I have a Pro77 that just developed the same problem after about 2 months. Any ideas??

  • jim smith Apr 22, 2013

    i have the same problem ,its the seal and ive tried to rig it with a new self made seal but didnt work , im wondering if its just cheaper to buy a new one than to have it repaired ?

  • frank desena
    frank desena Feb 05, 2014

    ii bought a whole box of different size seals, what size is needed for the phantom pistol

  • frank desena
    frank desena Feb 05, 2014

    if anyone need a seal dont buy just send me a self address stamped envelope and I will send you a couple


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Frank i would love to help you, i'm an airgun enthusiast too. please tell me the model crosman you're shooting at the moment and i would love to walk you through this, if you need repairs i'll also try to help get you in touch with parts or some ideas for service if it's needed.

Posted on May 06, 2008

  • jim smith Apr 22, 2013

    i have the same problem ,ive tried to make a small seal but of course it wouldnt work just right,i imagine its probably cheaper to buy a new gun than get this repair done.IMO


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  • 1 Answer

Where can i buy a new powerlet seal? i'm looking to put one on a crosman pro77. i don't think it has one...
thank you

Posted on Dec 25, 2009

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1 Answer

What is involved with repairing a leaking 357 Crosman. What is in the kit ?

What's in the kits is listed here. Usually piston seal/Co2 seal, chamber o-ring and oil. There are videos showing how to do the repairs.

357 Crosman repair kit Bing images

Jun 18, 2016 | Optics

1 Answer

Cos leaks out

Go to your hardware store and pick up some "teflon tape" the kind plumbers use and cut a strip an inch long and mold it around the top of your co2 cartridge install it and tighten it up and it will cut down on the amount of gas you lose on instalation...:)

Feb 10, 2013 | Crosman Optics

1 Answer

Need help instructing me on how to do a complete tear down of my 357 pellet pistal because the co2 cartridge leaks out when I try to install it

it sounds like the O-ring where the cartridge gets punctured has become compromised in some way as in its dry rotted or missing now

Dec 31, 2011 | Optics

2 Answers

I have a crosman model 380, .22 cal pellgun that leaks when the co2 is inserted and punctured. I cant see any seal or O-ring at the puncture point. What is missing and how can I fix the problem. Matt

I have the same problem and have dealt with guns for 40 years !
I am glad to see that the other folks have some realistic and innovative ideas of how to remedy this problem.
I went to Lowe\'s on a "tip" and found some very small \'O\' Rings for $ 0.87 for two and I am experimenting with them. The first try I couldn\'t crank the screw down far enough to even puncture the CO2 Cartidge. Using a larger screwdriver I finally managed to puncture the cartidge, unfortunately it still leaked but waas a much smaller leak.

Still experimenting.

I am going on-line to locate the Model 380 Schematic diagram which is where I ran int this site.

Good luck all !

Aug 17, 2011 | Crosman (4032)

3 Answers

When i instert the co2 in my airmag c11 it just releses all of the co2 and its all wasted what do i do???

Take a short strip of teflon tape and put it over the end of the co2 cartridge, make sure its in straight and tighten, works good.....:)

May 03, 2011 | Crosman (4032)

1 Answer

I had my Crosman 357 for about 15 years or so. I never used it at all until a couple weeks ago and it worked great for a few days and I liked it so much I bought more "clips", ammo and CO2 for it and then...

Well I recently bought a crosman like a month ago, I worked great, I also use CO2, then i started using it again, and all of a sudden all of the CO2 started seeping out of the barrel and CO2 area, cartridge after cartridge, so i said screw it and took it apart, and found the area that deals with the CO2 and tightened everything up. I couldn't put it back together, so i looked for the schematics and finally got it back together, then i tested it out and it works fine now. Good luck.

Oct 25, 2010 | Crosman Optics

1 Answer

I have a crosman 38t that I haven't used in awhile when I put they co2 cartridge in it leakses all out within seconds, what can I do???

It is likely some seals need to be replaced. I have had my 38 T for MANY years and have had the same problem. Seal kits are available, but not from Crosman. GOOGLE "Crosman 38 T seal kits" and you should be able to find where to order from. The cost is around$20+ for a complete set.

Btw, the reply from Norsky812 is waaay off the mark about the BB's. You clearly stated you have a Crosman 38 T, this gun shoots PELLETS.

Nov 14, 2009 | Crosman (4032)

3 Answers

I have a crosman c11 that leaks gas

Ya your better spending the extra money on something with quality

Aug 12, 2009 | Crosman (4032)

3 Answers

Crosman airguns 357 6 shot

What part are you having trouble with?
I have had mine apart several times trying to repair a leaky valve.
Could possibly make a you tube clip.

Dec 26, 2007 | Zeiss CONQUEST 3-9X40 MATTE Z PLEX

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