5kT A/C line test port thread size?

[Henry A Harper III]

Yes, the a/c valve is similar to a tire valve.

No, you can't use your tire valve tool to replace the valve core without
venting the system (which is now bad, illegal, etc.).

Unless it looks like this: http://www.tooltopia.com/mall/more.asp?ProdID=457
which is likely the type of gizmo the a/c shop will have and charge you a few
bucks for using (hopefully less than the price of the tool, which you now
know).

I'm still not clear how the valve core comes all the way out into atmosphere
and gets replaced without losing any refrigerant at all, must be some wicked
good seals in there because that's what it says it does.

HTH
Henry Harper
http://www.henry-harper.com hah at alumni.rice.edu
1991 200 quattro, 119.9k
1988 GTI 16v, 237k

On Monday, September 22, 2003 1:33 PM, Ameer Antar [SMTP:antar at comcast.net]
wrote:
> Thanks for the replay. I have a tire valve tool. Couldn't I just use that?
The
> question is if the a/c valve is the same as a tire valve? My guess is it's
> not, but I gots no idea... Do you know where these can be found? Thanks a
> bunch.
>
> -Ameer
>
> ---Original Message---
> From: <James at ringsperformance.com>
> Date: 9/22/03 8:38:32 AM
> Subject: Re: 5kT A/C line test port thread size?
>
> An AC shop should be able to change the Schroeder valve core in about three
> minutes without evacuating the system; there's a little gizmo just for that.
> Not sure what they'll charge, though . . .
>
> cu, James Marriott
> '87 4kq (alias "late-B2 90q") with rare ersatz NG engine, 184k, being
restored
> from rear-end total loss
> '89 200q (MC1, ProconTen/no bag, 1.8 blah blah), 154k, already been un-
> totaled
> Boise, ID, USA     http://www.webpak.net/~marriott/
> www.ringsperformance.com
>
> ----- Original Message -----
> From: "Ameer Antar" <antar at comcast.net>
> To: "Quattro List" <quattro at audifans.com>
> Sent: Saturday, September 20, 2003 3:19 PM
> Subject: 5kT A/C line test port thread size?
>
>
> Hey, I have a '85 5kT with A/C which uses the earlier GM-type compressor. The
> system seems to be filled w/ pressure b/c there is freon coming out of the
> test port (compression fitting, I think) near the upper line going to the
> condensor. There is a port valve (looks sorta like a tire valve, except for
> the fitting itself), which is leaking. There is a nylon cap which seems to
> keep the valve from leaking. I don't have the time/money to mess around w/
> the A/C system, so I'd like to just seal the system up until I can mess w/
> it. It doesn't seem like the nylon cap would last too long, especially under
> pressures of daily driving and such. So, I'm wondering if there's a way to
> fix the internal valve somehow w/o losing all or most of the system pressure.
> If not, I thought to just put on a new metal cap to replace the nylon one.
> Does anyone know if this would be possible? Also, how can I tell what size of
> fitting this is? Where can I get these fittings reasonably? What metal would
> be most appropriate? I've seen steel, stainless, and brass. I couldn't find
> aluminum although it seems like the rest of the system is aluminum. I hope
> someone on the list has had some A/C experience to help me out. TIA.
>
> -Ameer