Engine Size: 1.6L
Refrigerant Type: r134a
Ambient Temp: 80
besides freon, do I have to add oil? I already added the correct amount of PAG oil in the compressor before I assemble my AC system together, so when I go and charge it do I have to buy those oil bottles and charge it in too?
No, if the correct amount has been added to the compressor, you would not want to overcharge with oil by adding any more.
This post makes one ponder the aspects of adding the 'correct' amount of lube to the compressor. What is the correct amount added...most spec's are for a FULL system recharge. Adding a full charge of lubricant to a compressor prior to installation may result in some very interesting start up situations...esp on scrolls and rotary vane units....add this to a possible restricted condenser (less/restricted flow) and low mounted compressor......mmmmm.............lubricant should be distributed thru the system....yes...I know that the OE's start their systems will a full charge...but then....the OE's use a particular start up procedure that is not used by most techs....and certainly by most DIY'ers. Suggestion is to never add a complete lube charge to a compressor.....25-30% is sufficient...and this is based on a normal lube recharge amount....adding rear air adds another variable to this equation. Imagine adding 11 oz of lube to a "H" series compressor....or R4......an extreme over charge for sure. It should be remembered that an A/C compressor is not a hydraulic pump.
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So do i add about 30 percent to the compressor prior charging it? Then later on add in the rest of the oil?
Pour all the needed oil into various parts of the system before closing up. Don't use the cans of refrigerant plus oil. Ideally there should be a full charge of refrigerant in place before starting the compressor. A charging machine does that. The DIY method is to charge liquid refrigerant into the vacuum with the engine off, for as much as it will take. Then start the compressor and complete the charge quickly.
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