![]() Some cars don't have the auto amplifier A/C heater unit, but those are pretty rare. Over time, we will add some of those other options here. Traveling to Mexico to get R12 on the black market. There are some other options, R12 substitute. Skipping these recommendations will result in poor performance, leaks, or compressor failure. If you do not have access to the above, leave it to a shop to vacuum down and fill. I also do not recommend using anything other than pure R134a. I do not suggest using the cans you can get at the local parts store that come with the nozzle and you just plug into the low side fitting then pull a trigger. Rule of thumb, you should have the system on, windows down halfway, on normal A/C and output at the center vents on high fan should be 30° lower than ambient temps. There are many charts online to follow based on this. There are no exact pressures you will see on the system, and pressure is based on ambient temps. A good starting point is 1.2 lbs of R134a. An R134a charge is 80% of the R12 charge. Factory R12 charge was 950 grams +/- 50 grams. Factory Zexel DCW compressors require PAG46. original oil in system was mineral oil, you need to replace with 4oz PAG oil. This will help to pull any residual oils and moisture from the system. Take car not to twist low pressure switch wires from old unit, when removing, and when installing on new drier. Replace receiver drier, do not pull plugs/fitting caps off of drier until just prior to installation. Assemble everything in reverse, using green o-rings (240sx kit will work)Ĭondenser needs to be disconnected at front fitting, and at receiver drier, and flushed as well. Using A/C flush, blow out all oil residue from the evap core. You should replace the metering valve (240sx will work) Take care not to twist the wire for the suction temp sensor attached to the low pressure line. Seperate the 2 halves and clean out the evaporator core. once exposed, insert a flat tip screwdriver into the top of the clip, and pry up, DO NOT put the screwdriver through the side and try to pry, as the clip will actually exerrt more pressure and crack the housing. ![]() clips are hidden under the foam insulation. There are screws around the edge, and 2 clips holding the box together. Drop glovebox, remove cross bar, remove 5 screws, and 3 electrical connectors at the top. Next is to get the gas removed, and remove the evaporator assy. I have seen no change of fittings, one fitting, and proper conversions. Just because there are not R134a fittings on the system, does not mean one of the importers did not fill it to make it cold.then pull the fitting. More Information SKU: RMS328C: Brand: Roose Motorsport: Reviews.
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