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150cc or 200cc of oil, that is the question...

jgcox6 on Sun March 13, 2011 9:47 PM User is offline

Year: 1995
Make: Saturn
Model: SC2
Engine Size: 1.9l
Refrigerant Type: 134a
Country of Origin: United States

I have a 95 Saturn SC2 that currently has a compressor with a leaking front seal...I have a 1998 compressor (DCV-11G) that I want to replace it with. The label on the 98 compressor says that it is a 150cc oil system capacity. The original 95 compressor says that it is a 200cc oil system capacity. When I replace the 95 with the 98, how much oil should I add or remove from the 98 compressor that is going in the 1995 car?

HECAT on Wed March 16, 2011 7:23 AM User is offline

The different oil capacity indicates different system sizes and or different compressor displacement, system function, computer calibration, and charge quantity. If you must install the wrong compressor for this application, I would go with the larger quantity of oil so as not to starve the system. You will need to know how much oil is remaining in the system and subtract that amount; this will tell you how much to put in the replacement compressor. Basically a WAG.

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FLUSHING TECHNICAL PAPER vs2.pdf 

jgcox6 on Wed March 16, 2011 9:42 AM User is offline

Thanks for responding.....So in my case the newer compressor system requires less oil than the old....so I guess I will just measure the oil from the older compressor and put that back into the new one....right? I understand what you are saying that it really is kinda a WAG. The proper way would be to flush and redo to the original system, 200cc.

HECAT on Wed March 16, 2011 10:18 AM User is offline

That is basically how "oil balancing" is done; drain and measure the oil from the old compressor and put that amount of fresh back in the new unit. How much oil will not drain out of the old compressor (porting, rotating, sump, etc.)? How much oil is already in the replacement compressor (shipping oil, used oils, full system load, etc)? What is the quality and quantity of the oil remaining in the system (burnt, moisture, sealer, dye, & other contaminants, etc)? It is questions like these that have prevented me from ever trying it myself.

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HECAT: www.hecatinc.com You support the Forum when you consider www.ackits.com for your a/c parts.

FLUSHING TECHNICAL PAPER vs2.pdf 

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