Can you fill the air con from the charge valve, which I understand to be the low pressure point? If using the high pressure point then you can't simply top up, can you?
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The official low pressure port is near the evaporator - inside the car - booger to get at. Its actually the valve that houses the low pressure switch so you need to unscrew that first.
All that said - your compressor should have a service port on the low pressure side - this will not be a standard R134a connector - its something else...
Failing that - with the aircon turned OFF, the system can be charged from the high pressure port.
Topping it up yourself is really only worth doing if system has been vacuumed and leak tested... If you suspect you have a slow leak - then consider topping it up with a gas that includes a special dye that can be seen under UV light. This will pinpoint source of any leak.Paul Nugent
Webmaster http://S2central.net
Administrator http://S2forum.com
1994 S2 Coupe ABY - aka Project Lazarus
2001 A6 allroad 2.5TDi - family tank
2003 S4 Avant 4.2 V8 - daily burble
Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)
There are only 10 kinds of people that understand binary - those that do, and those that don't
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My car does have a slow leak. My mate tested to 10bar and it went down 0.1 bar over 10 minutes. I know the leak needs addressing, yet as I'm going on holiday down to Italy this week, I was thinking of using Halfords air con re-charge kit which has a sealant. This -I hope- would last at least the holiday.
As you have stated the low pressure port is in the middle of the car, do you have to take the dash apart? If so I won't bother and just put up with the heat! Oh well better get a drinks cooler for the journey!!Comment
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DUnno how hard it is to access the LP port on the UrS4 - can't you just lash up a hose/adapter to add the Halfords tin contents at the compressor ?
I have no clue if those sealants work - or for how long... Losing 10bar pressure over 10mins sounds to me like a large leak. Better to add something with UV dye as said before.Paul Nugent
Webmaster http://S2central.net
Administrator http://S2forum.com
1994 S2 Coupe ABY - aka Project Lazarus
2001 A6 allroad 2.5TDi - family tank
2003 S4 Avant 4.2 V8 - daily burble
Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)
There are only 10 kinds of people that understand binary - those that do, and those that don'tComment
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how do you know it is completely empty??....my A/C has never worked since I have owned it...so would it be safe to say it is empty and needs the oil??...
does the small bore pipe near the ECU, the one that I accidentely seperated...
have anything to do with the AC as a hissing sound along with gas escaped after said event.....
Sorry to go off topic Animalmother...
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