Automotive Air Conditioning Information Forum (Archives)

joeld on Tue April 05, 2011 9:32 PM

Year: 1995
Make: Pontiac
Model: Grand Prix
Engine Size: 3100
Refrigerant Type: 134

I am changing out the compressor, accumulator/drier, and orifice tube. Reason is the compressor has gotten noisey over the last three years and system will not hold a charge now. The bottom side of the compressor was covered with what appears to be the PAG oil being blown out with the freon. At least I hope this is the case.
I've read a lot of different "oil amounts" needed for the new compressor and drier, I'm just not sure how much it really needs.
I drained 1.5 oz from the compressor (old) from the drain plug.
I never did get any oil to drain from the drier, so I cut it open to have a look. No oil was pooling in the bottom, but the bags were fully saturated with oil.
So, I was thinking 2.0 oz in the compressor; and 2.0 oz in drier?

This is the V5 compressor

Thanks
Joel

TRB on Tue April 05, 2011 11:12 PM

AUTOMATIC A/C SYSTEM SPECIFICATIONS
Application Specification
Compressor Type Harrison V5 5-Cyl. Or HD6/HR6-HE 6-Cyl.
Compressor Belt Tension (1)
System Oil Capacity (2) 8 ozs.
Refrigerant (R-134a) Capacity 32 ozs.
System Operating Pressures (3)
High Side 275 psi (19.3 kg/cm2 )
Low Side 37 psi (2.6 kg/cm2 )
(1) Adjustment is not necessary. Belt tension maintained by an automatic tensioner.
(2) Use PAG Compressor Oil (Part No. 12345923) and R-134a refrigerant.
(3) Approximate maximum operating pressures with ambient temperature of 70°F (21°C), relative humidity of 50 percent, and engine speed of 2000 RPM.


Leaving original oil in the system means one simply guesses at how my oil to add. Is there still 4 ounces in your system?



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joeld on Wed April 06, 2011 8:38 PM

Thanks for the reply.
Yea, I understand what you're talking concerning oil left in the system. I was just trying to make a educated guess of how much oil would be safe to add.

I'll try the same amount that drained from old compressor (1.5 oz) and 1.5 oz in the new drier.

Thanks
Joel