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New A/C Compressor Oil - How Much to add?

edhunter on Wed August 18, 2010 9:34 AM User is offline

Year: 2001
Make: Jeep
Model: Cherokee
Engine Size: 6.ol
Refrigerant Type: R134
Country of Origin: United States

I bought a new Factory Air OEM Sanden Compressor SD709 that I am replacing because of a bad clutch on the other. The only thing i cannot figure out is how much oil do I add. The new compressor says that a small amount of Ice oil has been added but it does not say the quantity. There is no sticker on the compressor either. My old compressor says there is 240cc in it. Will the new one have the 240cc in it and if so will i have to remove oil instead of adding it after draing the old compressor? Thanks

HECAT on Wed August 18, 2010 2:25 PM User is offline

I would drain the "shipping" oil out of the new compressor, obtain a new filter and orifice device, flush the remainder of the system to dry bare metal; and then put it back together with the full "factory fill" of fresh oil. In many cases, this is now what is required to maintain a compressor warranty. Or you can use the oil "balancing" procedure... and just guess.

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edhunter on Wed August 18, 2010 4:01 PM User is offline

Actually the system works fine and there are no leaks or metal in the system. Just the clutch stops working when the system gets hot. Will any oil be left in the evaporator. I am replacing the accumulator, and orifice tube so I just want to get it right. Assuming the oil amount is 8 oz i will probably be putting something like 7 oz back in once drained out?

HVargas on Wed August 18, 2010 6:25 PM User is offlineView users profile

The evaporator and condenser will both have some oil in them. As well as the lines. As HECAT stated, the only way to get the "correct" amount of oil in the system is to flush everything and start over with bare metal. Everything else is just a guess. Too much oil will affect cooling performance, too little will affect performance and possibly cause the compressor to fail.

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fasto on Thu August 19, 2010 11:53 AM User is offline

Why don't you swap the clutch parts onto the old compressor leaving the AC system intact, and keep the new compressor as a spare in case the old one fails?

edhunter on Fri August 20, 2010 11:56 AM User is offline

The compressor is old, i got a brand new one for $150

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