gas problem

BILL W · January 25, 2004, 14:45

im having a gas problem on my g1 on my# 3 build using a 430 piston but the gas block must be really worn,gas hole ok ,not blocked, tube threads ok, should i replace the gas block or do they make an oversized piston, thanks BILL

mrbonecrusher · January 25, 2004, 17:05

I don't believe anyone makes an oversize piston, .430 being nominal size I'd replace the gas tube. Tapco, gunthings or DSA should be able to help.

elbo · January 25, 2004, 20:00

Are you saying you're loosing large quantities of gas around the plug?

BILL W · January 25, 2004, 22:04

its not bringing the bolt back,seems like excesive wear in the gas block

**W.E.G.** · January 25, 2004, 22:42

I think Moses has some oversized pistons.

But, it might be easier to just enlarge the gas port. A 7/64" bit will enlarge it to .109.

elbo · January 26, 2004, 09:39

Quote:

Originally posted by BILL W
its not bringing the bolt back,seems like excesive wear in the gas block

Piston fits the tube. Tube fits the block. How is the block worn?

ratas calientes · January 26, 2004, 09:54

I would first try a new gas tube.

If that doesn't do it, then you will probably have to enlarge the gas port a bit. You could enlarge it all at once to 0.109, or try a smaller increment. And make sure that you have already eliminated all of the other friction in the rifle.

BILL W · January 26, 2004, 10:40

i think the gasblock is worn, the 430 piston seems wobbly when in , ill try the drill bit next? thanks

ratas calientes · January 26, 2004, 13:47

The fit of the gas piston is dependent on the gas tube, not the gas block. G-1s are notorious for worn gas tube to gas block threads. A new gas tube works for many people in this case. If the new gas tube blows out, then soldering it in and making it into a short tube is a solution.

January 25, 2004, 14:45	#1
BILL W Registered FALaholic #: 5385 Join Date: Jan 2002 Location: ALTOONA,PA Posts: 120	gas problem im having a gas problem on my g1 on my# 3 build using a 430 piston but the gas block must be really worn,gas hole ok ,not blocked, tube threads ok, should i replace the gas block or do they make an oversized piston, thanks BILL

January 25, 2004, 17:05	#2
mrbonecrusher Registered FALaholic #: 6604 Join Date: Jun 2002 Location: Pocatello, Idaho Posts: 815	I don't believe anyone makes an oversize piston, .430 being nominal size I'd replace the gas tube. Tapco, gunthings or DSA should be able to help. __________________ Ships boarded, plundered and sunk by appointment only. Custom pirate attacks available.

January 25, 2004, 20:00	#3
elbo Registered FALaholic #: 8362 Join Date: Dec 2002 Location: va Posts: 2,803	Are you saying you're loosing large quantities of gas around the plug? __________________ Keep your trust in God; Your government has failed you miserably. The Lord Gives Me Grace and the Devil Gives Me Style

January 25, 2004, 22:42	#5
W.E.G. Administrator Silver Contributor FALaholic #: 1211 Join Date: Oct 2000 Location: Virginia Posts: 31,109	I think Moses has some oversized pistons. But, it might be easier to just enlarge the gas port. A 7/64" bit will enlarge it to .109. __________________ . . . Ask me about the Mason-Dixon FAL Collectors Association.

January 26, 2004, 09:54	#7
ratas calientes Registered FALaholic #: 1841 Join Date: Dec 2000 Location: New Mexico Posts: 7,828	I would first try a new gas tube. If that doesn't do it, then you will probably have to enlarge the gas port a bit. You could enlarge it all at once to 0.109, or try a smaller increment. And make sure that you have already eliminated all of the other friction in the rifle. __________________ Ratas Calientes (Hot Rats) Rats are people too!

January 25, 2004, 22:04	#4
BILL W Registered FALaholic #: 5385 Join Date: Jan 2002 Location: ALTOONA,PA Posts: 120	its not bringing the bolt back,seems like excesive wear in the gas block

January 26, 2004, 10:40	#8
BILL W Registered FALaholic #: 5385 Join Date: Jan 2002 Location: ALTOONA,PA Posts: 120	i think the gasblock is worn, the 430 piston seems wobbly when in , ill try the drill bit next? thanks

January 26, 2004, 13:47	#9
ratas calientes Registered FALaholic #: 1841 Join Date: Dec 2000 Location: New Mexico Posts: 7,828	The fit of the gas piston is dependent on the gas tube, not the gas block. G-1s are notorious for worn gas tube to gas block threads. A new gas tube works for many people in this case. If the new gas tube blows out, then soldering it in and making it into a short tube is a solution. __________________ Ratas Calientes (Hot Rats) Rats are people too!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode