I am gonna get a new compressor from NAPA and replace the drier. I need to have it flushed, my question is has anyone had a flush done? Do I have it flushed before i put the new compressor and drier in?

 

no or it'll have to be done again after the compressor is changed. after the compressor is changed they'll pull a vaccuum through the system, switch tanks, then fill it with new refrigerant

 

Not to make life complicated, but if you're going to go from R-12 to the new stuff (R-134a?) you need to flush out the old R-12 oil, since the new oil is incompatible. You might also see what other parts need to be changed in converting from R-12. The orifice tube, as I recall, may need to be different. Also, old hoses aren't always so good at keeping in the new refrigerant. I would flush it before I put in the new parts. No sense pushing the old oil and crap through your new pieces. Pulling a vacuum of course is different from "flushing" and would be done after the new parts are installed and everything is buttoned up tight, just before charging with new refrigerant.



I replaced a compressor on my old C-30 truck many years back, and I learned that it doesn't pay to skimp on parts. I bought a reman compresssor, and it lasted just past the 90-day warranty period. If this is a vehicle you intend to keep, I would try to find an OEM factory new compressor, if such a thing is available. Pay what it costs. You don't want to **** with the a/c again.



Talk to somebody that really knows auto a/c systems. I have heard of some refrigerants, including propane, that can be used without modifications to old R-12 systems. As with many things, there's science and there's politics.



Edit: Google "Freeze-12". R-12 replacement you can buy from Amazon. I don't have any first-hand experience with it.

 

i dunno if you remember a couple years ago, i did the A/c compressor in a gold 240D. its surprisingly easy, its about 5 bolts, comes out the bottom.



we switched that over to r134 (i think), and it works really well. the first rebuilt compressor i got was junk though, so i had to do it twice.

 

Well NAPA has rebuilt compressors that get fairly decent reviews. I can get the napa rebuild for about the same price as an advanced auto parts brand new one, but I've honestly had better luck with the napa stuff than the advanced auto crap. It's pretty easy to replace from the looks of it, maybe 3 bolts and it falls out.

 

yeah if you have the big round thing thats exactly what happens, 3 BIG bolts and it falls out... it looks like a CF from the top, but it comes out the bottom, you can even do it without having toe raise the car

 

I did mine on the passport 2 years ago. Compressor failed, so I pulled the entire system piece by piece, and cleaned it out with some degreaser(dont remember what I used, carb cleaner maybe?). Lots of black stuff came out, that I imagine came from the failure of the compressor. Put everything back in, replaced the compressor, drier, and orifice and had it recharged at a shop. Been perfect since.

 

NAPA says to keep their warranty intact you have to flush before you replace the compressor, then replace it and fill it.