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Oil question

Bala on Mon September 16, 2013 8:04 AM User is offline

Replaced the compressor due to noise from pulley. The old compressor didn't seem to have any oil in it. Just a few drips. I tried to turn the pulley a few times and still nothing. I had the ac mechanic drain the refrigerant. The brand new compressor has maybe around 1.5 ounces of oil when drained which I put back. Car is a Porsche panamera and both compressors say nd8.

Ac was working perfectly.

Questions are:
I understand some oil is in the system but shouldn't the old compressor have at least some oil in it?
Should I get more oil and put it in? Specs say 6.5 oz.
should I be using nd8 or pag46? Aren't they the same? Mechanic says use Esther.
Btw, the new compressor oil was clear white and the old one had a light yellow tint. These new systems are r134 correct so the oil cannot be different?

Thanks in advance.

94RX-7 on Mon September 16, 2013 9:40 AM User is offline

It would be best if you sourced the OEM ND-8 oil since oils from the auto parts store can vary in quality, and then there's the whole double-end-capped vs single-end-capped issue. I would not use Ester...the system already has ND-8 in it, which is some species of PAG, and I have a strong preference towards not mixing different oil types.

As to the question of oil amount....has the system ever been open before this? If not, I would follow Porsche's oil balancing procedure. Most OEMs have procedures and formulas that will tell you how much oil to add back when you replace a certain component.

Bala on Mon September 16, 2013 6:33 PM User is offline

The system was never open before this. I will check the Porsche procedures. Thanks

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