Replacement SKS gas valve opinions

clandestine · Feb 10, 2014

The oversize piston helps in some cases but what I have found is adding a tensioned load to the gas piston helps. You load the piston by cutting a new bevel on the small piston (operating rod) which allows the op rod to protrude more towards the muzzle. This loads the gas piston and eliminates play. The play can cause gas leakage depending on how consistent the system cycles. This assumes your main gas piston is not corroded.

Go oversized gas valve and if that does not work then perhaps buy a new op rod and experiment with that one as I explained. This works on many yugo sks's that won't cycle.

budman93 · Feb 10, 2014

clandestine said:
The oversize piston helps in some cases but what I have found is adding a tensioned load to the gas piston helps. You load the piston by cutting a new bevel on the small piston (operating rod) which allows the op rod to protrude more towards the muzzle. This loads the gas piston and eliminates play. The play can cause gas leakage depending on how consistent the system cycles. This assumes your main gas piston is not corroded.

Go oversized gas valve and if that does not work then perhaps buy a new op rod and experiment with that one as I explained. This works on many yugo sks's that won't cycle.

So would you recommend the oversized valve from Murray's?

clandestine · Feb 10, 2014

budman93 said:
So would you recommend the oversized valve from Murray's?

His gas valve is not bad. They seem to erode faster then the factory yugo units do but erosion won't hurt your sks in this situation. I don't like his other sks stuff though.

Rockchucker · Feb 10, 2014

clandestine said:
His gas valve is not bad. They seem to erode faster then the factory yugo units do but erosion won't hurt your sks in this situation. I don't like his other sks stuff though.

Is he (Murray) using "soft" stainless steel ?

I thought that the original problem with the original gas valves was directly connected to the Yugo military ammo from the corrosive primers used in these rifles.

budman93 · Feb 10, 2014

Rockchucker said:
I thought that the original problem with the original gas valves was directly connected to the Yugo military ammo from the corrosive primers used in these rifles.

That's what I have heard and read.

budman93 · Feb 10, 2014

I found another store selling the Murray valves claiming it is 303 stainless steel. I don't know if that is good steel or not.

Jradack · Feb 10, 2014

budman93 said:
I found another store selling the Murray valves claiming it is 303 stainless steel. I don't know if that is good steel or not.

That's the better stainless. 409 is the cheaper stainless.

yellowsled · Feb 11, 2014

CNC warrior. good stuff. used their valves before in yugo SKS's. fit perfect

budman93 · Feb 11, 2014

yellowsled said:
CNC warrior. good stuff. used their valves before in yugo SKS's. fit perfect

So what do you think of the oversized valves?

amoebicmagician · Feb 11, 2014

Murrays stuff is good, and stainless is important. I'm a big fan of stainless steel.

On the other hand, CNC warrior makes good stuff. never got something from them I wasn't happy with.

Id go with the stainless.

amoebicmagician · Feb 11, 2014

Then again, Clandestine knows his trade, and if he says he's seen them erode quickly, you can bank on it being true.

Maybe they changed to a better stainless recently? Try and find out how hard they make the steel they use, if you can.

budman93 · Feb 12, 2014

amoebicmagician said:
Then again, Clandestine knows his trade, and if he says he's seen them erode quickly, you can bank on it being true.

Maybe they changed to a better stainless recently? Try and find out how hard they make the steel they use, if you can.

I think it's 303 but I'm not sure. Maybe I'll shoot them an email and ask.

budman93 · Feb 12, 2014

well that was fast. Just got an email back from Ben Murray. The valves are indeed 303 stainless steel.

bkraft · Feb 12, 2014

I had a Murrays valve in one of my Yugos. Worked well. I eventually sold it and didn't have it long, but never had any problems or saw any sign of corrosion while I did. Of course, I am pretty anal about cleaning everything really carefully after I get home from each range trip.

budman93 · Feb 21, 2014

Well I finally got home and had a chance to look at the valve. It is pitted on the underside and there is some pitting around the gas port in the gas block as well. I think I'm going to get one of the stainless oversized valves from Murray's and try that.

6cylrider98 · Feb 22, 2014

Fixed my friends with a gas tube, it looked ok but when the piston was at the deepest part of the tube that's were it lost pressure. Got a Tapco one, fixed it. Swapped one of mine and it worked fine, so ?? easy swap if you gave one handy..

budman93 · Feb 22, 2014

6cylrider98 said:
Fixed my friends with a gas tube, it looked ok but when the piston was at the deepest part of the tube that's were it lost pressure. Got a Tapco one, fixed it. Swapped one of mine and it worked fine, so ?? easy swap if you gave one handy..

I may try that if the valve doesnt help.

clandestine · Feb 22, 2014

The Gas tube has little to do with cycling unless something is binding, but if the system is rotted bad it can help in some cases.

Gas Tubes have to be fit where the locking lever is and on Yugos unless you want polymer you have to change the handguard ferrule which is NOT easy.

budman93 · Feb 22, 2014

clandestine said:
The Gas tube has little to do with cycling unless something is binding, but if the system is rotted bad it can help in some cases.

Gas Tubes have to be fit where the locking lever is and on Yugos unless you want polymer you have to change the handguard ferrule which is NOT easy.

Yeah. I'm pretty sure that the tube on mine is fine, I think the problem is the pitting on the valve and on the gas block around the port.

6cylrider98 · Feb 23, 2014

took a few minutes with a file to fit the tube. His would not cycle, and wouldn't eject after the 1st shot. My .02..:-)

Replacement SKS gas valve opinions

The #1 community for Gun Owners of the Northeast

Member Benefits:

AR-15 Savant

Ultimate Member

AR-15 Savant

Banned

Ultimate Member

Ultimate Member

Active Member

Retired C&R Addict

Ultimate Member

Samopal Goblin

Samopal Goblin

Ultimate Member

Ultimate Member

Active Member

Ultimate Member

Ultimate Member

Ultimate Member

AR-15 Savant

Ultimate Member

Ultimate Member

Users who are viewing this thread

Log in

Forum statistics