Old Valve vs New

[Walt Ebie]

Finally bit the bullet and got a new gas valve - got tired of having to turn the old one on and off with a pliers. Anyway, here is the old one and the new one. The old one was installed not later than 1980. Notice how clogged the screen is. Also notice the new screen is a good bit longer than the old style and, you can't tell by this pic, but the new screen has a larger diameter - the old one with fit inside the new one. And the length of the new one might stop any crud that does get it the tank from being sucked into the line.

 

[iverson]

I had the same problem the packing was hard as iron with new packing it works new

 

[Tom Wesenberg]

The thread diameter looks smaller for both in and out on the new valve.

 

[bbrocksr]

The thread diameter looks smaller for both in and out on the new valve.

old one is closer to the camera, looks larger.
Bill

 

[Dino's A]

I still think that crud and whatever will get into the new valve and make it harder to turn. I had the same problem with my valve getting harder and harder to turn. After dissembling it and cleaning & lube it a little, it works better until the next time.

The only reason I didn't get a new is there was a lot of talk here about the new ones not completely turning off. I hope that situation has been resolved.........

 

[Brendan]

I still think that crud and whatever will get into the new valve and make it harder to turn. I had the same problem with my valve getting harder and harder to turn. After dissembling it and cleaning & lube it a little, it works better until the next time.

The only reason I didn't get a new is there was a lot of talk here about the new ones not completely turning off. I hope that situation has been resolved.........

i had that trouble, i have a down draft carb on my A. and a lot of rust in the tank. the valve got hard to turn and then it started to leak. bad for a down draft on a A with a full tank of gas. it washed the cylinders down

 

[Brendan]

i put in a ball valve, much easier to use

 

[C26Pinelake]

i had that trouble, i have a down draft carb on my A. and a lot of rust in the tank. the valve got hard to turn and then it started to leak. bad for a down draft on a A with a full tank of gas. it washed the cylinders down

Curious, why did you not clean the tank and get rid of the rust? Wayne

 

[Big hammer]

The screen in the inlet should keep the crud from wrecking the valve!! I guess I am going to have to put a screen in my late31 :-( I really don't like the idea of the screen laying on its side for the late31's set up.

 

[Walt Ebie]

Tom......must have been the angle of the photo. I installed the new valve this afternoon and it fit in without a problem (or as Archie Campbell used to say - for those who remember "Hee-Haw", it fid dit). But I noticed the new valve had just a little more thread on both sides and a little Permatex #2 sealed both sides just fine.

 

[Terry NJ]

Today I fixed the one on my Town Sedan. It was getting tight so I took it out and dismantled it. Then I used some red rubbing compound on the part ( stem?) that goes in the body of the valve. I put it into a vice and hand lapped the two pieces together. A few minutes and I cleaned it up and reassembled the valve and it worked fine. I have done this for my coupe also.
Terry

 

[Walt Ebie]

Thanks for the ideas.....now I'll have to take the old valve apart and see if it can be redeemed. Always good to have spare parts.

 

[Greg Jones]

Terry in NJ has the right approach. I think rust gets into the shutoff valve and acts like TimeSaver and laps the clearances wider, and the valve leaks. I take them apart and lap them, and lubricate with a gasoline resistant lubricant (forget the name but it is miraculous stuff used in aviation). The rust we are talking about here is a fine fine, red powder not big flakes.