|Originally posted by Raydar:|
Okay. One more question and I think I've got this.
Everything that I've read seems to indicate that a "rapid venting" of the system (I'm sure the high side hose blowing off the compressor/muffler would qualify) would cause the loss of about 3 oz of oil.
I removed the old accumulator this evening and only recovered about 3/4 oz of oil from it. (I really would have expected more.)
That accounts for maybe 4 oz.
So... should I expect there to be 4 oz of oil distributed throughout the system, and just re-add 4 oz? More?
I don't want to overfill, but rather there was too much instead of not enough.
I have not flushed the system. It doesn't look badly contaminated. No solids are evident.
Things that I have read seem to indicate that I may cause more issues than I resolve.
I will vacuum down the system before I charge it.
Again... I have read pages of A/C threads here, but nothing seemed applicable to my situation.
Anyone have any ideas?
The autozone 4392N or Advance Auto version accumulator will work fine. I used either one for two Fieros and it came out great. 4392N looks a bit generic with a domed top while the Advance one had a flat top.
Did you also replace the orifice tube?
Also, did you order Schraeder valve adapters? I found that Advance auto was the only one that had them in stock!!! You WILL need to replace these by using the schraeder removal tool.
The tool part #59302. You will be kicking yourself at 10pm at night if the schraders are leaking because you didn't remove them. You MUST remove them and install the adapters over the R12 style fittings on the new accumulator and the high side fitting down below in the tray. Reason these have to be removed is if you attempt to install the schrader adapters over the old fittings, it will bend the old schrader and the new schrader pins, and they will leak causing you have to do this all over again, or delay your repair if you are planning a road trip the next day. Trust me.http://www.fiero.nl/forum/Forum2/HTML/128738.html
Factory AirAir Conditioning Adapter
Part No 59976
Factory AirAir Conditioning Adapter
Part No 59978
Did you order a new pressure cycling switch for the accumulator too? If you are going to run R134a, the switch is slightly different. You also want to run PAG150 oil.
Istall the oil (4oz in accumulator canister, and 4 oz in compressor).
I thoroughly flushed the A/C lines on both cars using compressed air and lots of rags. I even flushed the accumulator and the condenser. Reason I flushed the condenser on the 2nd Fiero is because it wasn't dirty with black death, but I wanted to get all the mineral oil blown out. Now you are scratching your head thinking "but I thought everyone says don't flush the condenser!". I took the risk and flushed it anyway. Ideally, it would be better if the flush was done with the condenser off the car so you can tip the inlet/outlet pipes downward. Now why did I take that risk? I was reading Factory Aire compressor install instructions and I took their interpretation that only late model cars with parallel condensers have extremely small tube openings that plug easily. Since the Fiero condenser looks like it has wide diameter tubes, I took that risk. I didn't have black death grit on this car but I wanted to get the solvent in the condenser to bust up the mineral oil. The hardest part was holding a rag over the outlet pipe with the compressed air and thoroughly taking the time to get all the flush mist fully blown out.
I used Harbor Freight gauge set on the schrader valves. The trick is to not tighten down the port knobs to the point that you damage the schrader pins!!!! Gently turn it till you feel the pins depress. You need to pull a vacuum on the system. I pulled vacuum for well over an hour. Turned off the pump and confirmed negative vacuum was holding for several hours.
[This message has been edited by sricka01 (edited 07-10-2013).]