PDA

View Full Version : What is the proper amount of refrigerant to recharge the A/C on a 2001 A4 qm 1.8T?



a4_1.8t_01
06-05-2010, 11:41 AM
Hey everyone. I'm doing a recharge and the sticker that says the refrigerant is gone from underneath the hood. So I don't know the proper amount now. If anyone can check real quick would be great. I need the number in kgs not ounces (oz).

Let me know Thanks.

Jc61990
06-05-2010, 03:45 PM
i dont think theres a right number, u need to get a guage on the lines and according to the temp outside, theres going to be a different amount of PSI in the system, i think it should be around 45-50 psi

a4_1.8t_01
06-05-2010, 04:55 PM
Every car has a specific charge amount. Maybe your right but in any case I found the correct amount its .68 kgs. It's usually displayed on the bumper support on a sticker but mine is gone. The a/c machine asks for the proper amount.

Jc61990
06-05-2010, 04:59 PM
ah thats why, your using the machine, i thought u had bought a recharge kit

waspie
06-07-2010, 05:56 AM
machine or not there's ALWAYS a proper amount.


i know i replied to you on the other forums but on mine, the sticker was on the hood above the passenger side shock tower.

a4_1.8t_01
06-18-2010, 06:35 PM
Thanks but I have no stickers left.

2001A4QUATTRO
06-19-2010, 02:15 PM
The info I got online said 740 grams or 1.6 lbs. I will check mine in about 45 mins and post the actual

2001A4QUATTRO
06-19-2010, 05:03 PM
700 + 50 grams is what the sticker says. Good luck

revolution337
06-20-2010, 01:24 PM
700 + 50 grams is what the sticker says. Good luck

x2. you want your low side pressure around 30-35 PSI

waspie
06-21-2010, 04:39 AM
x2. you want your low side pressure around 30-35 PSI

sorry, pressures are only guide. as temperature increases or decreases the "sweet spot" also changes as well. 30-35 is not a one size fits all.

revolution337
06-21-2010, 06:22 PM
sorry, pressures are only guide. as temperature increases or decreases the "sweet spot" also changes as well. 30-35 is not a one size fits all.

true, but the high side is what is more affected by ambient temp. the low side is the metered pressure (and in turn, temperature) of the evaporator. as a rule of thumb, it should be 30 +/- 5 PSI

djwimbo
06-21-2010, 06:31 PM
as a rule of thumb, it should be 30 +/- 5 PSI

werd, in relative terms, low side pressure will be almost a 1:1 ratio of duct temps.