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 08-26-2009, 10:11 PM | #1 | Senior Member Join Date: Apr 2009 Posts: 400 |  Question gas piston M14 or M1A
Last time I fired my M1A it filed to eject. I cleaned the gas piston as to Springfield recommendations. The piston has some pitting on the outside and end of piston. Springfield does not say replace piston if pitted. I checked the OD of piston. All measurements where there was no pitting were .497. I measured the area where the pitting is there and are no high spots. If anything it could be 1/5 of a thousandth small. I can’t see that this would cause any problems. I would not want to score the cylinder walls, as this would be well over a $100 fix. I do not want to replace gas piston if not necessary, it is over $50. Any thoughts, thanks. __________________ Death By Gun Control The Mother of All Stats
In the 20th Century, at least 170,000,000 people were murdered by their own governments -- more killed than by crime – more than killed by war.
http://jpfo.org/index.htm | 
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| 08-27-2009, 12:46 AM | #2 | Call Me Doug Join Date: Mar 2008 Location: It's because I actually HAVE those skills! Posts: 21,258 |
I'm sorry brother - I love to help in these situations, but this is just outside anything resembling my area of expertise. 
In my total time in the shop, we have had ( 2 ) M1A's that wandered in and both left with the person who brought them by. 
Forum Member needs HELP over here!!!
JD __________________ "as for my Sword & Spear we will serve the throne, but NEVER that man who sits upon it" - Achilles - Warrior of Warriors
Quote:
Originally Posted by doctherock
Dillinger didn't have to let me try Cammenga Mags before I bought them; but he is a man of great character & a man who's word to me now is a good as gold. If he recommends it I know its good stuff.
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| 08-27-2009, 03:02 AM | #3 | Sic Semper Tyrannis Join Date: Nov 2007 Location: , The Mother Lode Posts: 18,437 |
What about cleaning it up with some fine emory cloth? What kind of shape is the recoil spring in? How's the ejector and the extractor look?
If it's the piston, there's one for $22. here: M14 Parts__________________
Ineptocracy (in-ep-toc’-ra-cy) - a system of government where those least capable of leadership are elected by those least capable of producing, and where the members of society least likely to succeed or provide for themselves are rewarded with goods and services paid for by wealth confiscated from a diminishing number of people who actually work and produce.
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| 08-27-2009, 04:39 AM | #4 | Senior Member Join Date: Jul 2009 Posts: 219 |
That shouldn't bother it.
With the bolt locked to the rear is the piston free to move in the cylinder? Does it slide from front to back as you elevate the muzzle to the ceiling and then turn it down towards the floor?
You should hear the piston sliding back and forth making a smacking noise as it hits each end.
Also +1 on what CA357 said. __________________
I don't make jokes. I just watch the government and report the facts.
Will Rogers
BTW, I'm front left in my avatar pic.
Last edited by 753X0; 08-27-2009 at 04:43 AM. | |
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| 08-27-2009, 06:02 AM | #5 | Senior Member Join Date: Apr 2009 Posts: 400 |
Thanks for the link. I only checked one place on the Internet and it was $50.
When I took off the gas plug I had to use a little force to get the piston out. So I’m sure the gunk on the piston was the problem. I used 3M Scotch Brite (green scuff pad) and bore solvent to clean the piston. The piston moves fine in the cylinder now.
I’ll be seeing a gunsmith who is an expert on M1’s, who also owns a M14 on Sept 13 and 14. See what he has to say, but for $22 for a good used piston. I may just buy it.
I used an M14 in the Army but we never cleaned the gas piston. __________________ Death By Gun Control The Mother of All Stats
In the 20th Century, at least 170,000,000 people were murdered by their own governments -- more killed than by crime – more than killed by war.
http://jpfo.org/index.htm | |
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| 08-27-2009, 06:50 AM | #6 | Sic Semper Tyrannis Join Date: Nov 2007 Location: , The Mother Lode Posts: 18,437 |
Last Crow, I have it's older brother, a '43 M1 Springfield Garand. I love these rifles.  __________________
Ineptocracy (in-ep-toc’-ra-cy) - a system of government where those least capable of leadership are elected by those least capable of producing, and where the members of society least likely to succeed or provide for themselves are rewarded with goods and services paid for by wealth confiscated from a diminishing number of people who actually work and produce.
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