Welcome to 2CarPros.
Honestly, you should be able to find aftermarket parts. The chances of finding them at a dealership I feel are slim, but maybe a dealer has old stock. I understand what you are asking about buying tubing and making your own, but I don't think you will be able to make the crimps needed for o-rings to seal.
Here is a list of all the parts related to the auxiliary AC on your vehicle. I'm including them so you will have part numbers and exactly what to ask for. The attached pictures correlate with the parts indicated on the lists. Note that the lists are for both heating and cooling.
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1994 Ford Truck E 150 Van V8-351 5.8L
Refrigerant and Heater Lines, Rear
Vehicle Heating and Air Conditioning Hose/Line HVAC Service and Repair Removal and Replacement Refrigerant and Heater Lines, Rear
REFRIGERANT AND HEATER LINES, REAR
Refrigerant and Heater Lines, Rear
Removal and Installation
Refer to the following illustrations when removing and installing auxiliary air conditioner lines and heater tubes.
Heater Tubes Auxiliary Unit to Vehicle Underbody
pic 1
Item/Part Number. Description
1 19805. Auxiliary Heater Assembly
2 18A459. Grommet
3 18C266. Heater Hoses
4 18658. Heater Core Case Seal
5 -. Vehicle Underbody
6 -. Drain
Air Conditioner Lines and Heater Tubes Auxiliary Unit to Vehicle Underbody
pic 2
Item/Part Number. Description
1 19D578. A/C Evaporator Core Seal
2 18K463. Auxiliary Heater and Air Conditioner Assembly
3 18A459. Grommet
4 18C266. Heater Hoses
5 18658. Seal
6 19E746. A/C Tube Lock Coupling Clip
7 19867. Evaporator to Compressor Suction Line
8 19837. Dryer to Evaporator Liquid Line
9 18N332. Clip
10 -. Drain
11 -. Vehicle Underbody
Dash Panel Heater Tubes, Auxiliary Heat Only
pic 3
Item/Part Number. Description
1 14A163. Retainer
2 12A581. Engine Control Sensor Wiring
3 18C553. Hose and Tube Assembly (4.9L, 5.0L, 5.8L, 7.5L Gasoline Engines)
5 -. Strap (Part of 18C553)
6 N804234-S2. Screw (2 Req'd)
7 -. Vacuum Hose Fitting (Part of Vacuum Harness)
8 8287. Clamps
9 -. Vacuum Fitting (Part of Vacuum Harness) (7.3L Diesel Engines)
10 -. A/C Vacuum Hose Assembly (Part of Vacuum Harness) (7.3L Diesel Engine)
Dash Panel Air Conditioner Lines and Heater Tubes, Auxiliary Air Conditioning and Heat
pic 4
Item/Part Number. Description
1 14A163. Retainer
2 12A581. Engine Control Sensor Wiring
3 N804234-S2. Screw (5 Req'd)
4 19N617. Hose and Tube Assembly (Suction Line)
6 18C553. Hose and Tube Assembly (4.9L, 5.0L, 5.9L, 7.5L Gasoline Engines)
7 -. Straps (Part of 18C553)
8 -. Vacuum Hose Fitting (Part of Vacuum Harness)
9 -. Vacuum Fitting
10 -. A/C Vacuum Hose (Part of Vacuum Harness) (7.3L Diesel Engine)
11 -. Route Item "10" Through Shield as Shown
pic 5
Item/Part Number. Description
1 14A163. Retainer
2 12A581. Engine Control Sensor Wiring
3 19N617. Hose Assembly (Suction Line)
4 19972. A/C Lines
5 N8044234-S2. Screw (5 Req'd)
6 19E558. Tube Assembly
7 19E746. A/C Tube Lock Coupling Clip
9 18C553. Hose and Tube Assembly (4.9L, 5.0L, 5.8L, 7.5L Gasoline Engines)
11 -. Strap (Part of 18C553)
12 -. Route Item "17" Through Shield as Shown
13 19N651. Tube Assembly (Liquid Line)
14 18C266. Heater Hoses
15 -. Vacuum Hose Fitting (Part of Vacuum Harness)
16 -. Vacuum Fitting (Part of Vacuum Harness) (7.3L Diesel Engine)
17 -. A/C Vacuum Hose Assebly (Part of Vacuum Harness) (7.3L Diesel Engine)
Vehicle Underbody Heater Tubes, Auxiliary Heat Only
pic 6
Vehicle Underbody Air Conditioner Lines and Heater Tubes, Auxiliary Air Conditioning and Heat
pic 7
Item/Part Number. Description
1 18N332. Clips
2 18472. Heater Water Hose
3 -. Vehicle Underbody
4 19835. Condensor to Evaporator Tube
5 55917-S2. Screw (6 Req'd)
6 N807204-S36B. Stud (4 Req'd) 22.5-25 Nm (16.6-18.4 Ft-Lb)
7 N621905-S36. Nut (4 Req'd) 22.5-25 Nm (16.6-18.4 Ft-Lb)
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I hope this helps in some way. Let me know if you have other questions.
Take care,
Joe
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Friday, August 2nd, 2019 AT 9:20 PM
