As mentioned in another threat I my R-12 was drained during import into Europe. So now I need to switch to 134a as R-12 is illegal here...
However, reading through this threat left some confusion. Appreciate if someone can add some clarity on the following:
- switches: it was said that R-12 high pressure switch will not operate correctly but can be adjusted by turning the adjustment screw 1/4 ccw. So no other switches or adjustments other than that needed, correct?
- PAG oil: I'm an A/C dummy so sorry for that stupid question (I know there are no stupid questions but I think this one is...) but the oil is not only inside the compressor but the entire system, right? So, I need to remove the compressor from the car, drain it and also flush the rest of the system?
However, in an case I can re-use the OEM compressor with no further modifications?
- Orifice tube: do I need to swap it? If so, Rockauto lists a variety:
*GM GENUINE 155151 {#03033879, 3033879, 3033879OEM}
*ACDELCO 155754 {#19189768, 88919511} - "OE replacement"
*ACDELCO 1550120 {#19189841, 89032868} - "Optional Automatic Adjusting Orifice Tube For Normal Climates Under 105 Degrees"
*ACDELCO 1550122 {#19189843, 89032872} - "Optional Automatic Adjusting Orifice Tube For Severe Climates over 105 Degrees"
Which one is correct? Germany is not a super hot place, however does the "hot climate version" maybe improve the cooling power? I heard that the ZR has it's limitations here...
Will I need a remover tool to get the job done or will needle nose pliers work?
I already have a new dryer on the shelf which I will install including some fresh O-Rings. Now I need to collect the rest and plan the actual work.
Sorry for all these questions but as spare parts are sometimes hard to come by over here I became very careful to not destroy things due to stupid mistakes
