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Suppressors can't get my YHM cobra apart

corey4

corey4

Sergeant
Full Member
Minuteman
Feb 11, 2012
1,425
467
pittsburgh pa
title says it all.

i have about 300 rounds of 9mm thru it, and about the same for .22. the booster comes out fine, i just cant get the mono-core out. any suggestions?

we have tried a strap wrench, nothing.

dumping 100 rounds as fast as possible to heat up the can and core, used gloves and a strap wrench, nothing.

next step is trying to make a set of blocks with a c-channel cut into them, lined with rubber and then clamping the can in a vise and trying that.

no "dip", can is aluminum.

is it stuck for good?
 
Re: can't get my YHM cobra apart

The centerfire rule of thumb has bit you in the ass unfortunately. You dirtied it up pretty good and the 22 put you over the edge. I would soak it in warm soapy water for 12 hours at least and see if you can break it apart then.
 
Re: can't get my YHM cobra apart

i have heard of people doing that, but they said "after a few thousand rounds" or "1000+ 22" etc.

i have had it apart once and cleaned it. i did about 100 22, and 100 9mm.

i'll try the soap and water.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body">title says it all.

i have about 300 rounds of 9mm thru it, and about the same for .22. the booster comes out fine, i just cant get the mono-core out. any suggestions?

we have tried a strap wrench, nothing.

dumping 100 rounds as fast as possible to heat up the can and core, used gloves and a strap wrench, nothing.

next step is trying to make a set of blocks with a c-channel cut into them, lined with rubber and then clamping the can in a vise and trying that.

no "dip", can is aluminum.

is it stuck for good? </div></div>

I wouldn't recommend putting it in a vise.

You have messed up by not taking it apart and by shooting 2lr through it. The last manual I saw said NOT to shoot 22lr through it. What does your manual say?

I wouldn't keep firing it to get it to come lose, all you are
doing is solidifying the junk inside.

If you are not able to get it apart I would suggest you send it back to YHM and use their warranty and hope they don't charge you for opening it.
 
Re: can't get my YHM cobra apart

hmmm, didn't get a manual with it.

the only reason i shot the 22 thru it was because the can does come apart.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body">hmmm, didn't get a manual with it.

the only reason i shot the 22 thru it was because the can does come apart. </div></div>

The design says no 22lr. This is the main reason why the YHM Mite is total fail. If you shoot much through it it locks right up.
 
Re: can't get my YHM cobra apart

well f8ck me runnin'...

what if i boil the suppressor instead of the hot water?
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body">well f8ck me runnin'...

what if i boil the suppressor instead of the hot water? </div></div>

Water will not breakdown lead residue only piss your wife off for using her pots for gun purposes.
 
Re: can't get my YHM cobra apart

Soak it in Kroil or fill it with Kroil. Or Elite Iron gun oil. Or some other penetrating oil. And turn the core the correct direction.
If all else fails, mail it to me. You can form 5 if you like.
You aren't the first person to gum-up a suppressor.
 
Re: can't get my YHM cobra apart

is it lead build up or just crud? or we don't know because we can't see it. it was only a few hundred rounds. if i do boil, i'll buy a cheap pot. besides, my wife doesn't cook. if it is crud, i can't see why boiling would be a bad idea. but then again, i thought 22s wouldn't be a bad idea either, and here we are.

i see on kroil's website "guaranteed to meet your expectations, whatever they maybe". i wonder if they are NFA, 2A friendly?!

i tired PB blaster, that didn't work either.

if it is lead build up, i was thinking heating the internal threaded area. the melting point of lead is 621.5F, and aluminum is 1221F. but this might be a bad idea too.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body">is it lead build up or just crud? or we don't know because we can't see it. it was only a few hundred rounds. if i do boil, i'll buy a cheap pot. besides, my wife doesn't cook. if it is crud, i can't see why boiling would be a bad idea. but then again, i thought 22s wouldn't be a bad idea either, and here we are.

i see on kroil's website "guaranteed to meet your expectations, whatever they maybe". i wonder if they are NFA, 2A friendly?!

i tired PB blaster, that didn't work either.

if it is lead build up, i was thinking heating the internal threaded area. the melting point of lead is 621.5F, and aluminum is 1221F. but this might be a bad idea too. </div></div>

You can try Kroil but crud mixed with lead is not a good combo.

I would not recommend using heat on the threaded area, results could be bad!

I would recommend sending it to YHM and have them deal with it, they have the appropriate tools for this as this is more common and any other issue YHM deals with.
 
Re: can't get my YHM cobra apart

thanks guy.

i am doing the soapy water soak now. i replace the water every once in awhile as it gets cold.

i'll try boiling next. it can't hurt. it's only metal at 212F. unless someone chimes in that it is a bad idea. and, all of my other ideas have been bad.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body">thanks guy.

i am doing the soapy water soak now. i replace the water every once in awhile as it gets cold.

i'll try boiling next. it can't hurt. it's only metal at 212F. unless someone chimes in that it is a bad idea. and, all of my other ideas have been bad.

</div></div>

Only problems that you can face is if you shoot it again and the moist residue is not 100% dried it becomes a magnet for new buildup and a more difficult job to get it apart.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: StalkingRhino</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body">thanks guy.

i am doing the soapy water soak now. i replace the water every once in awhile as it gets cold.

i'll try boiling next. it can't hurt. it's only metal at 212F. unless someone chimes in that it is a bad idea. and, all of my other ideas have been bad.

</div></div>

<span style="color: #CC0000">Only problems that you can face is if you shoot it again and the moist residue is not 100% dried it becomes a magnet for new buildup and a more difficult job to get it apart.</span> </div></div>

Ummmm no. Do some research before giving advice. How do you suppose you shoot a can wet if not by putting water or wire pulling gel inside it?!
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KYS338</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: StalkingRhino</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body">thanks guy.

i am doing the soapy water soak now. i replace the water every once in awhile as it gets cold.

i'll try boiling next. it can't hurt. it's only metal at 212F. unless someone chimes in that it is a bad idea. and, all of my other ideas have been bad.

</div></div>

<span style="color: #CC0000">Only problems that you can face is if you shoot it again and the moist residue is not 100% dried it becomes a magnet for new buildup and a more difficult job to get it apart.</span> </div></div>

Ummmm no. Do some research before giving advice. How do you suppose you shoot a can wet if not by putting water or wire pulling gel inside it?! </div></div>

I am certain I have done far more research than you have on this.

He is trying to get it unstuck. If he moistens it, can't get it open then just shoots it hoping to break it free(from the heat as discussed above) and that internal residue is not dried out it will only serve as a magnet and increase buildup. More buildup is not going to help get it apart.

We aren't talking about how to shoot it wet, we are talking about how to get it open.
 
Re: can't get my YHM cobra apart

You might have "done the research"... but I have physically done it hundreds of times. As in I sacrifice my own equipment and suppressors to do the procedures I recommend. If the hot soapy water doesn't work he needs to call YHM and let them suggest his next move because anything else he could risk damage.

Shooting a can with moisture in it will not hurt anything. Its the exact same thing as shooting a can wet. The first 3 shots will burn all of the water out and quickly. Suppressor temps jump exponentially because of the trapped gas, hence their ability to burn off liquids at an accelerated time frame.

He wont get any noticeable buildup by continuing to shoot 9mm thru it. DO NOT run 22lr thru it anymore, I hope you have learned your lesson with that caliber. Breaking apart a 22lr can still shouldn't be that hard. The SWR Spectre and both versions of the Sparrow were always fairly easy to get apart with some oil.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KYS338</div><div class="ubbcode-body">You might have "done the research"... but I have physically done it hundreds of times. As in I sacrifice my own equipment and suppressors to do the procedures I recommend.</div></div>

I apologize for not explaining my use of the term 'research'. I consider research to include actually verifying said thought patterns as well. Things can work on paper but in reality it is different, it is all part of the research process.

I have researched and physically done it hundreds of times and do so on a daily basis.

Never said it would hurt the can (I shoot all my pistol and rimfire cans wet all the time), just said it won't make it any easier to take apart by adding buildup.

Unfortunately the comparison of Spectre or Sparrow to a Cobra is a poor one. The Spectre has a baffle stack seperate the mount and endcap(and a tool to press the core out as well). The Sparrow has clamshells. The Cobra the monocore is attached to the endcap which has to be rotated as a whole to unscrew it from the tube. Once the monocore is bonded to the tube its extremely difficult to rotate the core to break it apart. Hence the problem with Cobras and Mites. Why they didn't design it like their Wraith we will never know.

Regardless, hes on the right path for getting it taken care of, and if he can't get it done himself YHM will get him squared away no doubt.
 
Re: can't get my YHM cobra apart

I was trying to explain why the 22 cans are designed as such. The maker knows how dirty 22lr is.... so they make them extremely easy to take apart. Unlike a 9mm can. Hence the issue with the OP's suppressor in question.
 
Re: can't get my YHM cobra apart

Have you asked the lawyer who did your trust yet? After all, thats what you paid for.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KYS338</div><div class="ubbcode-body">I was trying to explain why the 22 cans are designed as such. The maker knows how dirty 22lr is.... so they make them extremely easy to take apart. Unlike a 9mm can. Hence the issue with the OP's suppressor in question. </div></div>

Gotcha, I read it wrong.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: cpt. obvious</div><div class="ubbcode-body">Have you asked the lawyer who did your trust yet? After all, thats what you paid for. </div></div>

Think you posted in the wrong thread?
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: StalkingRhino</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: cpt. obvious</div><div class="ubbcode-body">Have you asked the lawyer who did your trust yet? After all, thats what you paid for. </div></div>

Think you posted in the wrong thread? </div></div>

I couldnt resist, carry on.
 
Re: can't get my YHM cobra apart

no, he didn't post it in the wrong thread. he is trying to highjack the thread. he is being a smart ass from another thread; quicken trusts vs lawyer trust.

i stated my opinion, he and a few others tried to jump all over me, so i ignored them. it is not worth my time to get into an internet tough guy argument. now he is trying to use my misfortune and try to make me feel bad. boo hoo.

and i really don't give a rats ass.

back on the original subject...
 
Re: can't get my YHM cobra apart

Yeah, it was a cheap shot.

I am interesting in the outcome of this thread though.

I am looking at getting a thompson 9mm/multi cal take apart can this year that I would shoot 9mm and alot of 22 thru. If 22 gums up a take apart can so bad you cant get it back apart I may have to rethink my options.

Good luck.
 
Re: can't get my YHM cobra apart

from my understanding, it is the design of the YHM take apart can. are you familiar with it? i'd love to show you pictures, but i kinda can't right now!!! lol.

and, take KYS338 and rhino's advice and my stupidity, don't shoot 22 thru it. CHECK TO MAKE SURE YOU CAN DO 22.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: cpt. obvious</div><div class="ubbcode-body">Im am an NFA novice. looking to change that this year pending legislation. </div></div>

The thing to look for is if the monocore is attached to the piece that you have to unscrew.

If it is and you gum it up too bad then it will be a bear to get it apart if not impossible.

We have modified some YHM Mite's to eliminate this issue, no complaints either since then.

The design of most monocores is flawed for take apart capabilities unless you have an awesome design/idea like the clamshells SilencerCo uses.
 
Re: can't get my YHM cobra apart

So you only have 600rds through it and its jammed up good?


I may not end up getting the Isis-2 then...
 
Re: can't get my YHM cobra apart

The 22lr is the culprit of the issue here. Had you stuck to only 600 rounds of 9mm. It would come apart pretty easily with some elbow grease.

Ive shot at least 500 rounds in a weekend of subsonic 9mm thru my cans before and they come right apart. I wipe them down, apply a little anti seize on the tube threads and reassemble the can.
 
Re: can't get my YHM cobra apart

another issue i might have is when i took it apart to clean it the first time, i over used the antiseeze and now i am wondering if i cooked the antiseeze to the 2 parts of the can. but, i did have it apart the day i put a few hundred rounds of 22 thru it.

from what you said, i tired the soapy water 12 hour soak and i still can't get it. i am leaving it over night again and i am having a buddy come over tomorrow so we can both twist on it. if not, then i will try putting it in a pot over heat to make the water hot for an extended period of time (not really boiling the can like i said before) to try and loosen the crud.

if it is a no go, then i'll call YHM friday afternoon.
 
Re: can't get my YHM cobra apart

Since everyone here seems ready to argue:
"The design of most monocores is flawed for take apart capabilities unless you have an awesome design/idea like the clamshells SilencerCo uses."
AAC addressed this with the Prodigy which uses a tapered monocore. This is handier than the M2 which uses a straight core.
YHM will solve your problem, of that I am most certain. If you try Kroil and really soak everything, the crud will get gummy over time and maybe break loose. I would do this because I am unable to accept defeat.
smile.gif
 
Re: can't get my YHM cobra apart

ben, i am unable to accept defeat as well. putting the can in a pot of water over heat tomorrow to try an loosen the crud.

if it is leaded in, then i know it wont come undone. i am hoping it is just gunk.
 
Re: can't get my YHM cobra apart

so, soaking in soapy water for 2 days did nothing.

boiling for an hour did nothing.

called YHM, and the guy i need to talk to isn't in today.

hmmm, maybe i should have marinated, put salt in the water for flavor and simmered for 20 minutes.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: cpt. obvious</div><div class="ubbcode-body">
Do 22s still lead up a can even if youre shooting plated bullets?
</div></div>

my guess is yes!!! lol


i think i'd kno
grin.gif
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body">so, soaking in soapy water for 2 days did nothing.

boiling for an hour did nothing.

called YHM, and the guy i need to talk to isn't in today.

hmmm, maybe i should have marinated, put salt in the water for flavor and simmered for 20 minutes.</div></div>

Did you try the freezer yet? Cold contracts - heat expands. Contract the metal and you may get less friction on the threads.

It's not going to cost you anything and it won't hurt anything.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: PBinWA</div><div class="ubbcode-body">Did you try the freezer yet? Cold contracts - heat expands. Contract the metal and you may get less friction on the threads.

It's not going to cost you anything and it won't hurt anything. </div></div>

i should probably let it dry for awhile incase there is any water left. yes/no?

have you tried this yet?
 
Re: can't get my YHM cobra apart

I have yet to see a copper plated .22lr bullet in the same sense as copper plated 9mm or the like.

My experience is that they are copper WASHED not plated, meaing its far thinner than copper plating on a centerfire round and comes off just with the barrel friction.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: cpt. obvious</div><div class="ubbcode-body">
Do 22s still lead up a can even if youre shooting plated bullets?
</div></div>

my guess is yes!!! lol


i think i'd kno
grin.gif
</div></div>

Touche sir.

I would let it dry out just in case, dont want water expanding and possible messing something up in there.
 
Re: can't get my YHM cobra apart

i guess the only thing is my wife asked if it was ruined and if i need a new.

why yes, yes i do.
 
Re: can't get my YHM cobra apart

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: corey4</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: PBinWA</div><div class="ubbcode-body">Did you try the freezer yet? Cold contracts - heat expands. Contract the metal and you may get less friction on the threads.

It's not going to cost you anything and it won't hurt anything. </div></div>

i should probably let it dry for awhile incase there is any water left. yes/no?

have you tried this yet?</div></div>

I did it with my Liberty Constitution when it was stuck. Seemed to work. I would make sure it was dry.
 
Re: can't get my YHM cobra apart

Good luck man,

Hope you get it fixed.


Im hoping to get the ball rolling on a 9mm can this year and probably shoot alot of 22 thru it also. I plan on getting a dedicated 22 can later, but money is tight and if I can make 1 suppressor work on 4 guns for about a year I will have the cash to get a 22cal suppressor next year. Then a 30 cal or 556.

If I cant shoot 300 rds of 22lr through it without gumming it up I may be forced to just get a 22 can first.
 
Re: can't get my YHM cobra apart

do your homework on a 9mm/22 can.

shooting the 22 thru the can was WAY more impressive than the 9mm. like...paintball gun impressive. i have never seen 5 dudes over 30 years old giggle like 1st graders when someone toots in class.

i am going on the hunt next week for a sparrow in stock in PA.
 
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