[Diy_efi] AIR fitting

[Quinn D. Eskimeaux]

You probably have 5/16 inverted flare steel line, same uses for fuel lines, 
Wallace
----- Original Message ----- 
From: "Mike Frels" <mfrels at ix.netcom.com>
To: <diy_efi at diy-efi.org>
Sent: Friday, September 09, 2005 8:01 PM
Subject: Re: [Diy_efi] AIR fitting


> 7/8 inch!!!? The ones on my manifolds are more like around 1/2 inch. One 
> at each exhaust port. Are we talking about the same thing?
>
> Mike
>
> -----Original Message-----
> From: gary <gas- at charter.net>
> Sent: Sep 9, 2005 5:07 PM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] AIR fitting
>
> If it is similar to the later 350s with AIR it is a 7/8" 18 TPI inverted
> flair tube/fitting assembly.
>
>> When I removed the tubes I noted that the fittings and the flair
>> on the tubes looked just like the steel brake lines...
>
> Principle is the same, as the seal is between the nut and flair of
> the tube, not on the thread of the nut.
>
> Had picked up some generic inverted flair tube nuts to seal hole
> vacated by discarded AIR plumbing, by plugging hole in the nut
> itself, BUT with the seal designed to be between the tube flair
> and nut, I chose to plug the hole in a short section of the original
> tube left inside the OEM nut.
>
> As this tube/fitting was not intended to be plugged, I personally
> am unaware of any commercially available industrial plugs.
> Having stated this, an individual on a 'B body' specific forum has
> made available 7/8" 18 TPI stainless plugs for this purpose.  If
> interested in going this route, email me off list.
>
> Hell, some even choose to 'throw' a 22 X 1.5 mm metric oil pan
> plug in the exhaust manifold.  The metric plug OD is sloppy/small
> enuf to screw in and tolerate minor cross threading of the 1.5 pitch
> (17 TPI) metric thread.  This obviously puts responsibility of the
> seal on the thread itself, not unlike a pipe plug.  It works, I guess.
> Not MY style, but to each their own I 'spose.
>
> GAS
>
> ----- Original Message ----- 
> From: "Steve Ravet" <Steve.Ravet at arm.com>
> To: <diy_efi at diy-efi.org>
> Sent: Thursday, September 08, 2005 11:58 PM
> Subject: RE: [Diy_efi] AIR fitting
>
>
> anyone know what kind of fitting the AIR tubes use where
> they attach to the exhaust manifold?
> The engine in question is a TBI chevy 350 ('91 Caprice).
>
> ----- Original Message ----- 
> From: "Mike Frels" <mfrels at ix.netcom.com>
> To: <diy_efi at diy-efi.org>
> Sent: Friday, September 09, 2005 7:07 AM
> Subject: RE: [Diy_efi] AIR fitting
>
> On my '86 Thiird-gen Camaro manifolds when I did my engine swap
> last year I had to swap the AIR tubes to a different set of '87 and later
> manifolds to clear the center bold valve cover lips. When I removed
> the tubes I noted that the fittings and the flair on the tubes looked just
> like the steel brake lines with fittings that can be bought at any auto
> parts store. I do not know if they *are* the same. I just noticed that
> the looked the same.
>
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