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2000 Passat Wagon (My first a/c project)

Snipsa on Tue June 30, 2009 2:07 PM User is offlineView users profile

Year: 2000
Make: VW
Model: Passat
Engine Size: 1.8t
Refrigerant Type: R134a
Ambient Temp: 82
Pressure Low: 24
Pressure High: 200
Country of Origin: United States

Hello, I am excited about getting started with some DIY a/c work. I have several vehicles in the family lined up for diagnosing/repair.

First up is my 2000 Passat Wagon. The #s are above. FWIW the static pressure was 90psi cold. The readings above were after running the system for about 10mins.

The a/c is functional but can have hard time keeping up on hot days. I do not know any history of the car but I have not done any work on the a/c system in the year that i have owned it and have not noticed any changes in its operation.

I have a gauge/hose set, can tap, and an electric vac pump.
Can somebody please post the specs for this a/c system and an idea of where to start?
Can I add some r134 to the system as is or should I start from scratch by having the charge recovered so I can vac the system and recharge from there? Do i need to worry about adding more oil to the system?



HVargas on Tue June 30, 2009 3:05 PM User is offlineView users profile

Your best place to start is to evacuate the system and fully charge with 23oz of R134a up to 24.8oz if your build date is before 09/2000. If your build date is 10/2000 of after, depending on the compressor, which will have the part number stamped on it either Denso 7SB-16C it holds from 21-21.9oz. If it is stamped Denso 7SEU16 then the capacity is 18-18.9oz. Odds are since yours is labeled a 2000 and not 2001 you require the 23-24.8oz of R134a. Be sure to recover all of the refrigerant to see how much was in the system. That will help you determine if that was the problem. Sounds like you might have a leak somewhere and just be a little low on refrigerant. You do not need to worry about adding oil to the system unless you replace something.


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