gas plug rust
- Thread starter Odd Shot
- Start date
Got a pic?
Pretty much only you can decided if there is a real issue going on there.
Just rusty, then cleanup and grease.
If gaps in threads or entire threads missing, that's a different story.
How rusty are we taking?
M
Pretty much only you can decided if there is a real issue going on there.
Just rusty, then cleanup and grease.
If gaps in threads or entire threads missing, that's a different story.
How rusty are we taking?
M
Last edited:
I've already done a preliminary cleaning with an emery board, some extra fine steel wool and elbow grease.
Will use use some rust remover to get out the stubborn bits between the threads.
This is what it looks like:
Doesn't looks as bad without the flash photography...must be some white balancing thing
inside the gas cylinder:
Will use use some rust remover to get out the stubborn bits between the threads.
This is what it looks like:
Doesn't looks as bad without the flash photography...must be some white balancing thing
inside the gas cylinder:
PPCLIGullyPlatoon
Regular
Hmmmm, water got in there from somewhere. Looks like it just needs a really good scrubbing and a little grease to fill the gaps between the grooves of the threads.
The gas chamber itself looks clear - so I am not thinking corrosive ammo. Maybe the previous owner was parading around in the rain????
I doubt this is going to be an issue ----- but the neglect makes me think you might want to check the rest of the rifle over.
The gas chamber itself looks clear - so I am not thinking corrosive ammo. Maybe the previous owner was parading around in the rain????
I doubt this is going to be an issue ----- but the neglect makes me think you might want to check the rest of the rifle over.
Looks like it was assembled dry and left to sit a while. Smokeless powder is hygroscopic and h2o is a byproduct of combustion. Add ambient humidity and heat in proximity to iron and you get iron III oxide aka rust. I've bought two rifles from CGNers that never saw corrosive ammo but were shot and left uncleaned for months. Both have minor pitting in the bores. I always clean powder fouling and oil steel surfaces after shooting. Corrosive cleaning gets the copper removed too.
PPCLIGullyPlatoon
Regular
In adding to what Supernova said ---- don't neglect your gas system after firing ----- yes, it's a pain; it's meant to be LOL!
FirearmsEnthusiast
CGN frequent flyer
- Location
- Kingston, ON
I just picked up an M305 and put a little spark plug grease on the gas plug threads (but kept the rest of the gas system dry of course) - is this a good idea to protect the threads and gas plug from seizing and possible corrosion or did I get some bad advice from the Internet?
Bazzoka_Joe
Regular
- Location
- PRQ(People Replublic of Quebec)
i prefer anti-seize it hold better in high temp
Anyone read FM 23-8, U.S. Rifle 7.62mm, M14 and M14E2. It tells you everything you need to know about cleaning an M14 after firing. Folks wanna play with sojer guns, they need to learn how to use them like sojer guns. Keeping small arms serviceable is a matter of training, discipline and availability of the right cleaning supplies.
To clean up that rust I'd use a wire wheel on a Dremel. It will clean out the threads w/o making any dimensional change.
To clean up that rust I'd use a wire wheel on a Dremel. It will clean out the threads w/o making any dimensional change.
PPCLIGullyPlatoon
Regular
Read the maintenance section of the manual ---- "Paragraph 27 Normal Maintenance: a) The rifle should be inspected daily, when in use, for evidence of rust and general appearance. A light coat of oil should be maintained on all metal parts except the gas piston, interior of the gas cylinder and the gas plug."
The manual doesn't recommend any lubricant at all for any part of the gas system including the threads of the gas plug. Which kinda makes sense ---- hot gas from firing is what travels down the gas system ---- the piston is in close tolerances, so if oil or gas is on the gas plug, and becomes liquified, it could travel into the gas system itself.
I would just clean the rust out, and be done with it --- maybe consider replacing the gas plug with an OEM??? Just a thought.
I believe the Springfield Armory M1 and M1A manuals recommend greasing the gas plug threads. It is probably found in other US mil manuals too. I use whatever grease I lube the rifle with. This year its Lucas extra heavy duty cos it was within arms reach. And if you're finding corrosion in the gas system then consider cleaning and oiling it prior to longer storage stints. Just remember to clean it before firing. You can run it oiled up for short shooting sessions provided you clean it often. After a few hundred rounds fired semi auto with 5 rd mags there is no more mess than a dry gas system and it cleans up a little easier. Of course pushing it to extremes is where you will eventually make a mess. For combat use, follow the manual!
Oil and grease don't go in your gas system, period. EVERY military manual and pamphlet as well as kunhaussen ect , state that the system must be dry and oil free.
These residues , under high heat and friction, cause permanent varnishing of piston and cylinder walls.
My guess is corrossive ammo salts are present where the gas plug has rusted on you. First, use a method of cleaning that neutralizes those salts. Then apply rust mort with a brush only to the affected area (canadian tire auto section).
A one time application of CLP to plug threads and wipe dry.
Should be all that is needed
These residues , under high heat and friction, cause permanent varnishing of piston and cylinder walls.
My guess is corrossive ammo salts are present where the gas plug has rusted on you. First, use a method of cleaning that neutralizes those salts. Then apply rust mort with a brush only to the affected area (canadian tire auto section).
A one time application of CLP to plug threads and wipe dry.
Should be all that is needed
This is interesting. Every time I pull my gas plug I have been greasing the plug threads. To date, I haven't encountered any problems. Mind you I don't shoot tons of ammo through it either. Maybe 200-300 rounds per year. A 2007 import, purchased new in 2008.
M
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