Step Four: Remove the receiver drier and replace it with an R-134a compatible (XJ-7, XJ-9) receiver drier (see photo 2).
Step Five: Install R-134a high and low service port fittings will prevent R-12 from being reintroduced to the A/C system.
Step Six: Check all hoses and electrical connections. Evacuate and charge the system with R134a refrigerant.
NOTE: Each vehicle will vary as to the amount of refrigerant needed.
Step Seven: Affix a retrofit label to the vehicle. The
EPA requires labeling all A/C systems, which have been retrofitted.
The entire service took 4 hours. It may take you a little longer. The entire procedure can
be performed with simple hand tools. After the procedure the BMW 325 A/C system ran
quieter and virtually vibration free. Within a few minutes the system cooled down to 40
degrees. Now that’s cool !
