gas tube problem on yugo 59/66

big4by4 · 01-02-2007, 12:59 AM

hello all. this is my first post here3. i recently got a yugo 59/66 from big 5 for 159.00 for christmas 06. When I first went out and shot it I found the now appearent problem of the gas leak at the valve. Then I researched and foun a lot of solutions ranging from an o-ring (that blows out quickly) to the most common stainless steel wire. I am a deisel engine mechanic. One day I was driving home and a thought occoured to me. There is an o-ring that DETROIT DESIEL uses to repair a faulty injector that is made like an exhaust doughnut off a chevy manifold, but much smaller. the size of a dime. I went and picked one up for $10.37 . Part number is 23511870. I took it home and found it fits perfectly fits into the gas tube, but will not allow the valve to fit into it. So at first I tried to stretch the doughnut to fit around the gas valve. that did not work. it was too much mass to fit in there. so i ended up pulling it apart and wrapping it around the gas valve. for those who dont know what an exhaust doughnut is, it is wire mesh molded into lead. I havent had the chance to shoot it yet but with the lead i assume that it will seal better than wire alone. All comments appreciated.

Big Dog · 01-02-2007, 05:08 AM

We're always learning new ideas for old problems! Sounds like it may well work.
And welcome to G&G!

headshot · 01-07-2007, 11:04 PM

This is my first post as well. I have 2- 59/66 SKS yugo's. what constitutes a gas leak around the gas piston. does there have to be serious pitting? and if so where? I noticed on one of my 2 yugo's that there is some minor pitting on the part that is attached to the barrell where the small exhaust port is and only around where the port is. I have not shot this gun yet but does it sound like it will be a problem?
Thanks

mdj696 · 01-08-2007, 07:46 PM

I bought aSKS bout 20 years ago and discovered when I shot it, it had a short recoil problem, failure to extract, eject, and therefor failure to feed. Took it in basement with duct tape around gas tube, turned off lights and saw flames shoot out from front of gas tube where connected to barrel. These tubes get oblongated during assembly, diassembly. Put on new tube, problem solved. Former small arms repairman, 1st Inf. Viet Nam. mdj696

Rave · 01-12-2007, 08:01 PM

See semiauto not working,Norinco!

01-02-2007, 12:59 AM	#1
big4by4 Member Join Date: Jan 2007 Posts: 43 Trader Rating: (0)	gas tube problem on yugo 59/66 hello all. this is my first post here3. i recently got a yugo 59/66 from big 5 for 159.00 for christmas 06. When I first went out and shot it I found the now appearent problem of the gas leak at the valve. Then I researched and foun a lot of solutions ranging from an o-ring (that blows out quickly) to the most common stainless steel wire. I am a deisel engine mechanic. One day I was driving home and a thought occoured to me. There is an o-ring that DETROIT DESIEL uses to repair a faulty injector that is made like an exhaust doughnut off a chevy manifold, but much smaller. the size of a dime. I went and picked one up for $10.37 . Part number is 23511870. I took it home and found it fits perfectly fits into the gas tube, but will not allow the valve to fit into it. So at first I tried to stretch the doughnut to fit around the gas valve. that did not work. it was too much mass to fit in there. so i ended up pulling it apart and wrapping it around the gas valve. for those who dont know what an exhaust doughnut is, it is wire mesh molded into lead. I havent had the chance to shoot it yet but with the lead i assume that it will seal better than wire alone. All comments appreciated.

01-02-2007, 05:08 AM	#2
Big Dog Moderator Join Date: Mar 2002 Location: Tallahassee, Florida Posts: 10,063 Trader Rating: (0)	We're always learning new ideas for old problems! Sounds like it may well work. And welcome to G&G! __________________ Moderator of: AR15/M16, M14/M1A, New/Beginning Shooters and Militaria/Collectables.

01-12-2007, 08:01 PM	#5
Rave Senior Member Join Date: Mar 2002 Location: Tampa Posts: 6,744 Trader Rating: (0)	See semiauto not working,Norinco! __________________ USAF '62-'66 .

01-07-2007, 11:04 PM	#3
headshot Member Join Date: Jan 2007 Location: Georgia, suburb of Mexico Posts: 19 Trader Rating: (0)	This is my first post as well. I have 2- 59/66 SKS yugo's. what constitutes a gas leak around the gas piston. does there have to be serious pitting? and if so where? I noticed on one of my 2 yugo's that there is some minor pitting on the part that is attached to the barrell where the small exhaust port is and only around where the port is. I have not shot this gun yet but does it sound like it will be a problem? Thanks

01-08-2007, 07:46 PM	#4
mdj696 Senior Member Join Date: Jan 2007 Posts: 241 Trader Rating: (0)	I bought aSKS bout 20 years ago and discovered when I shot it, it had a short recoil problem, failure to extract, eject, and therefor failure to feed. Took it in basement with duct tape around gas tube, turned off lights and saw flames shoot out from front of gas tube where connected to barrel. These tubes get oblongated during assembly, diassembly. Put on new tube, problem solved. Former small arms repairman, 1st Inf. Viet Nam. mdj696