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I am going to replace my AC compressor. The snout where the compressor clutch rides on is ground down a bit so a new clutch assembly won’t fix it. I did NOT have an internal failure. The AC was ice cold and did not leak.
can I just replace the compressor with pre-filled oil or do I need to replace anything else? I have already evacuated the whole system.
Just dump out the old oil from the bad compressor and put the same amount into the new one and reinstall....too much is just as bad as not enough....as long as it is NOT an internal failure you should be OK....there is a TSB concerning this.
This bulletin is being revised to change the PAG oil part number used for R4 and A6 compressors with R-134a refrigerant systems. Please discard Corporate Bulletin Number 02-01-39-004A (Section 01 - HVAC).
All General Motors vehicles built with R-134a refrigerant systems shall now be serviced with GM Universal PAG Oil (excluding vehicles equipped with an R4 or A6 compressor).
R4 and A6 compressors with R-134a refrigerant systems shall use PAG OIL, GM P/N 12356151 (A/C Delco part number 15-118) (in Canada, use P/N 10953486).
Important: The PAG oil referenced in this bulletin is formulated with specific additive packages that meet General Motors specifications and use of another oil may void the A/C systems warranty.
Use this new PAG oil when servicing the A/C system on the vehicles listed above. Oil packaged in an 8 oz tube should be installed using A/C Oil Injector, J 45037. Refer to the HVAC Section of Service Information for detailed information on Oil Balancing and Capacities.
Just dump out the old oil from the bad compressor and put the same amount into the new one and reinstall....too much is just as bad as not enough....as long as it is NOT an internal failure you should be OK....there is a TSB concerning this.
This bulletin is being revised to change the PAG oil part number used for R4 and A6 compressors with R-134a refrigerant systems. Please discard Corporate Bulletin Number 02-01-39-004A (Section 01 - HVAC).
All General Motors vehicles built with R-134a refrigerant systems shall now be serviced with GM Universal PAG Oil (excluding vehicles equipped with an R4 or A6 compressor).
R4 and A6 compressors with R-134a refrigerant systems shall use PAG OIL, GM P/N 12356151 (A/C Delco part number 15-118) (in Canada, use P/N 10953486).
Important: The PAG oil referenced in this bulletin is formulated with specific additive packages that meet General Motors specifications and use of another oil may void the A/C systems warranty.
Use this new PAG oil when servicing the A/C system on the vehicles listed above. Oil packaged in an 8 oz tube should be installed using A/C Oil Injector, J 45037. Refer to the HVAC Section of Service Information for detailed information on Oil Balancing and Capacities.
The compressor I am going to order is pre-filled with oil. Should I be concerned about adding or is there an actual way to verify the oil type & level is correct?
here is a link to the unit I was going to purchase but instead from rock auto and not amazon
As I mentioned however many ounces come out of the old compressor should be added to the new…as far as the type of oil there is no way I know of to determine that…I don’t think the type would be that critical whether the OE PAG oil or a universal type.
You will always want to change the DRIER anytime the system has been opened up, it is a limited life-span element of the A/C system, it gets used up in contact with water(desiccant gets used up) so when the system has been opened, the water from air accumulates and uses it up.
Next, the system needs to completely vacuumed out for hours using a vacuum pump. This is to remove any water from the air and also diagnose any leaking.
Once the system is completely sealed verified, and the water has been removed via strong vacuum pumping, you can add the A/C gas and oil as needed.
I like copilots description of what happens if you leave the water
I've always heard the ice crystals forming can damage components and block orifices
AC Compressor swap, what else needs replaced?
