Last week, I posted an article about rebuilding the Behr “wingcell” (rotary vane) A/C compressor from the FrankenThirty (my salvage-titled 1988 BMW E30 3 Series). The idea was that the car isn’t worth ...

Over time, a car's air conditioning system will begin be less and less effective, until the day when you turn the knob and all it spits at you as you roast in the summer heat are tepid, warm gusts.

The compressor is the power unit of the air-conditioning system that puts the refrigerant under high pressure before it pumps it into the condenser, where it changes from a gas to a liquid. A fully ...