90CS Quattro V6-2.8L (AAH) (1994)
Hose/Line HVAC: Description and Operation
-
The mixture of refrigerant oil (PAG oil) and refrigerant R-134a attacks some metals and alloys (for example, copper) and breaks down certain
hose material. Use only hoses and lines which are identified with a green mark (stripe) or the lettering "R-134a"
-
Hoses and lines are secured with threaded connections. Always properly torque hose and line connections