……
Corvair DiagramCorvair Photo
Corvair Center
home forum corvairs calendar links Corvair Podcast
California Corvairs
Clarks Corvair
Clarks Corvair
“CORSA"



Chevy Corvair License Plate
Chevy Corvair Chrome Wheel
Corvair Center Forum :  Corvair Center Phorum - presented by CORSA The fastest message board... ever.
Corvair Center 
Pages: 123Next
Current Page: 1 of 3
o rings for steel gas lines to carbs?
Posted by: nnsquared ()
Date: January 01, 2014 07:21PM

Anybody else use them?

I have had success sealing lines without torqueing the heck out of the nut. Only issue I've had is with the wrong compound. Disintegrates when I open the line to change carbs or check filters. Your experience?

Regards,
Kerwin,
Newtown Square, PA 19073

65 Monza 110 PG, Stinger wannabe SW 001;
has moved on to club member. Photo will stay.

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: cooterr ()
Date: January 01, 2014 07:23PM

I have used o-ringsd on fuel lines for years with no problems.

Tom Miller
Circle City Corvairs
Corsa

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: davemotohead ()
Date: January 01, 2014 07:24PM

Never heard of such a thing? I use a double flair fitting,no leaks.







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: vairchet ()
Date: January 01, 2014 07:31PM

Same as Davemotohead.... only use flared tubing. Never had a problem.

Some Corvair Guy in Ramona

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: lgoodwin ()
Date: January 01, 2014 08:18PM

Tried one in a pinch, didn't work at all. Replaced the section with a good used one after I got home.

<table align='center' width='0'>
<tr>
<td><img src='[www.automation-scs.com]; alt='1962 Corvair 900 sedan' width='190' /></td>
<td><img src='[corvaircenter.com]; alt='1967 Corvair Monza 140/4-speed' width='190' /></td>
<td><img src='[corvaircenter.com]; alt='1968 Corvair 500 coupe' width='190' /></td>
<td><img src='[www.automation-scs.com]; alt='1983 Mexican Mustang 5.0' width='190' /></td>
<td><a href='[www.automation-scs.com&]; target='_blank'></a></td>
</tr>
<tr>
<td align='center'><font size='1'>1962 900 sedan needs a home</font></td>
<td align='center'><font size='1'>1967 Monza 140/4-spd</font></td>
<td align='center'><font size='1'>1968 500 coupe (now my son's)</font></td>
<td align='center'><font size='1'>1983 Mexican Mustang 5.0</font></td>
</tr>
</table>

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: 63turbo ()
Date: January 01, 2014 08:19PM

Kerwin- that's cool- I read about that in a Corsa Communique (I think) from years ago- this is to add O-rings between the double flare fittings, so you can get a leak free fit using only your fingers- no wrenches required! Do have
a o-ring material that has worked well for you?
Kevin

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: MattNall ()
Date: January 01, 2014 08:43PM

I would imagine any O-ring for a Fuel injection component


My '79 Eldo with Bosch FI used them...

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: RobertC ()
Date: January 01, 2014 08:45PM

Never had a problem with the steel lines - other than twisting a double flare off by over tightening.

I do believe that the material in the filter nut is slightly softer than the steel line.

Over many years of removal / tightening (over tightening), I believe the filter nut flare "wears".

If there is a problem sealing, I replace the filter nut.

My wife's 65 Corvair still has the original gas lines to the carbs - with the slightly rounded off nuts before I learned about flare nut wrenches.

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: Frank DuVal ()
Date: January 01, 2014 08:54PM

I too have always had the steel (now cunifer) double flare lines seal unless there was a grove cut in the flare. I'm not sure an o-ring would flow to fill a groove.

Brakes, fuel, whatever.

Frank DuVal

Fredericksburg, VA

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: strangecars ()
Date: January 01, 2014 09:05PM

I would be very skeptical about using an o ring on a double flared fitting. It seems very dangerous.....Just fix it correctly.

Steve Morton
1961 Rampside, 67 and 2 1964 Monzas

Morton's Classic Garage
Parts and Service
Nampa, Idaho 83686
40+ Corvairs and a semi trailer full
of parts

Mortonsclassicgarage@gmail.com
[www.facebook.com]

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: MattNall ()
Date: January 01, 2014 09:09PM

strangecars Wrote:
-------------------------------------------------------
> I would be very skeptical about using an o ring on
> a double flared fitting. It seems very
> dangerous.....Just fix it correctly.
==================================================

What's the danger?? Fuel is under 5 psi.....O-ring may dampen harmonics....

Straight steel fractures with age... ask Timothy Shortle

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: RobertC ()
Date: January 01, 2014 09:17PM

MattNall Wrote:

>
> What's the danger?? Fuel is under 5
> psi.....O-ring may dampen harmonics....
>

Flare fittings / connections seem pretty simple to me...

This seems to be an example of over thinking the problem / solution ggggg

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: MattNall ()
Date: January 01, 2014 09:22PM

RobertC Wrote:
-------------------------------------------------------
> Flare fittings / connections seem pretty simple to
> me...
>
> This seems to be an example of over thinking the
> problem / solution ggggg
===========================================================

They are... archaic even! ggg O-rings are far superior...what NEW devices come with Steel Flairs???


And anything that keeps someone from over-tightening the nuts, has got to be good! IMO!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: Tom Z ()
Date: January 02, 2014 02:29AM

if the flare on the steel line is 'cracked' from over-tightening,I'd replace the line..I 'fixed' a couple minor line-to-carb leaks by tightening/loosening the line to a spare carb nut, if doing that to the one on car didn't work (new Clarks pre-bent ones on a 140)..Modern FI setups ( ie 80's-up GM TBI) have different fittings that call for an O-ring,and (IIRC) also have a teflon washer inside the inlet that's cone-shaped,which probably would work better, IF you could get them out..The flaring tools may be slightly different,so "setting" the line flare to the carb inlet or coupling (for std-length tank to engine replacement) may be needed; ALWAYS hold the 'nut' w/ a wrench to avoid twisting the line or stripping the carb threads..

Tom Z,,Rochester NY

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: richard1 ()
Date: January 02, 2014 02:49AM


Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: gnvair ()
Date: January 02, 2014 04:29AM

Saginaw type fittings that GM still uses in many applications are a modified inverted flare with an O-ring (usually Viton on fuel applications and Teflon on power steering).
I have the old Corsa tech guide (1986?)and the o-ring trick was detailed in there.
It is for worn inlet nuts. The only way I would do it is with a Viton o-ring. Nitrile tends to dissintegrate with fuel.
Another fix that I saw years ago would be to use the copper tapered over lay to repair a crushed/worn inlet nut.

Lee J

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: azdave ()
Date: January 02, 2014 04:44AM

gnvair Wrote:
-------------------------------------------------------
> Another fix that I saw years ago would be to use
> the copper tapered overlay to repair a
> crushed/worn inlet nut.


Here is a similar thread. Read the third paragraph of my reply. It explains why old inverted flare connections leak when over-tightened too many times. It also shows the copper sealing rings I used.

[corvaircenter.com]




Past discussions:
[corvaircenter.com]

Dave W. / Gilbert Arizona
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4 A/C
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5



Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: Mel ()
Date: January 02, 2014 05:02AM

YIKES O rings eye popping smileyMake sure you have your fire insurance paid upeye rolling smiley

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: vairmech ()
Date: January 02, 2014 05:06AM

The flair nut washers are still available and used sometimes in aviation fittings.

There is nothing wrong with using o-rings to seal our fuel lines if done properly. My ONLY fear in using them on a flair fitting is the nut will back out with vibration and cause a leak. They get away with using o-rings in the modern high pressure systems because the o-ring is captured in a pocket made for it in the fitting. The nut then puts a pressure on the o-ring but bottoms out in the thread cavity for the friction locking so it won't come loose.

The trick on using o-rings in our flair fittings is to NEVER use a wrench on them, fingers only. Otherwise you will over tighten and disintegrate the o-ring. That is my only beef in doing any o-rings with flair fittings is the fact that yo have no nut locking available unless you use locktite or safety wire.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

Options: ReplyQuote
Re: o rings for steel gas lines to carbs?
Posted by: Paulsgt ()
Date: January 02, 2014 06:29AM

I've had O-rings on my 2 carbs (65/110) for several years (8-10 maybe). When I took it apart last year I noticed that the O-rings had desinigrated. Probably overtightened on my part. No leaks ever. The O-rings had been reccomended by a reliable Corvair mechanic several years ago. I left the rememnants in there because I need to dis-assemble the carbs again this winter. I'll probably put new O-rings in. I propose that with age, the double-flare gets flattened out and doesn't seal as well.

Paul Sergeant
CORSA Central Division Director / CORSA Treasurer
Lee's Summit, MO
CORSA since 1975
Member – HACOA, Corvair Minnesota, CORSA, Little Indians, POCI


Options: ReplyQuote
Pages: 123Next
Current Page: 1 of 3


Sorry, only registered users may post in this forum.
This forum powered by Phorum.