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Re: Where is the expansion valve
It does not have an expansion valve. It uses a fixed orifice tube in the line. They seldom go bad (get plugged).
What are your symptoms that make you think you have a bad orifice?
The a/c system compressor should cycle on and off about 4 times/minute at 70 degrees F. AT 90 F, it should stay engaged all the time. The on/off control is a pressure switch, usually on the accumulator bottle.
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The 3.9 L V8 Lincoln LS does not have a PCV valve. There is a tube on the drivers side of the engine that goes from the valve cover/crank case to the air intake and this is what performs the crankcase ventilation. There is no valve to change
For the Lincoln LS V8, there is a flexable tube on the drivers side of the engine that runs from the valve cover/crankcase to the air intake tube. There isnt a PCV valve for this engine, it is just a tube for ventilation.
Follow the a/c lines to the firewall. The part they are attached to is the expansion valve. Once the a/c system is evacuated the lines can be removed from the expansion valve. The expansion valve can then be removed from the EVAP core.
In order to charge, you must locate the low pressure valve to install the refrigerant. The low pressure valve is between the compressor and the evaporator. Do not charge on the High Pressure side, The high pressure valve is between the compressor and the condenser. To locate the low pressure valve, follow the line that comes from the compressor and routes toward the firewall. The valve will be somewhere on that line. Do not overcharge. The amount of pressure that is needed on the low pressure side will depend on the ambient outside temperature.
Service Gauge Port Valves
The high-pressure service gauge port valve is located on the A/C receiver drier manifold and tube assembly.
The low pressure service gauge port valve is located on the manifold of the A/C compressor manifold and tube assembly at the A/C compressor.
A/C evaporator core
Thermostatic expansion valve
Manifold and tube assembly—thermostatic expansion valve
Manifold and tube assembly—A/C compressor
A/C charge port valve (low side)
A/C pressure relief valve
A/C pressure transducer
A/C condenser core
A/C charge port valve (high side)
Manifold and tube assembly—receiver drier
Sensor—evaporator air discharge temperature