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Auto A/C Component replacement
Q: What if I am replacing the A/C compressor? Where do I add that oil?
A: When replacing the A/C compressor, you should make all attempts to follow the specific instructions provided with that compressor. Some compressors will ship with the oil already installed; others will ship virtually dry. If no manufacturer's instructions are available, you should start by draining all the oil from the new replacement (or remanufactured replacement) and from your old compressor. Measure the amount drained from your old compressor and add that amount plus one ounce to the replacement. That oil should be added directly into the suction port of the A/C compressor. If you can not drain any oil from your old compressor, you should add about 1/3 of the total system charge of oil to the compressor. As a rule, the A/C system will hold between 8-12 ounces of oil. Therefore, depending on your particular system, you would add between 2-1/2 and 4 ounces into the replacement compressor. For best results, use Polymax2 refrigerant oil because it's non-hygroscopic (will not attract moisture) and is approved for use with all oils. Also consider adding an in-line A/C filter for added protection for your new compressor. These in-line filters are almost like insurance for your A/C Compressor. You can see more details on those in-line A/C compressor filters here.  Also see the complete article on replacing your auto A/C Compressor.  


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Our list of FAQ's is growing, so please visit back often. If you can't find the right answer here, visit the auto A/C help and discussion board at the COOL ZONE. You'll get all the right answers to your questions about troubleshooting and diagnosing auto A/C systems.

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