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Four Seasons 39070 A/C Expansion Valve - Rear
| Brand | Four Seasons 39070 |
|---|---|
| Position | Rear |
| Color | Aluminum |
| Description | Expansion Valves |
| Liquid Inlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 8 |
| Liquid Inlet Size IN | 0.4 |
| Liquid Inlet Size MM | 10.15 |
| Liquid Inlet Style | Captured O-Ring |
| Liquid Inlet Thread Type | Not Threaded |
| Liquid Inlet Type | O-Ring |
| Liquid Outlet Fitting Gender | Female |
| Liquid Outlet Fitting Thread Diameter | No. 10 |
| Liquid Outlet Style | Captured O-Ring |
| Liquid Outlet Thread Type | Not Threaded |
| Liquid Outlet Type | O-Ring |
| Lqd Out Size IN | 0.61 |
| Lqd Out Size MM | 15.5 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mounting Hole Quantity | 2 |
| O-Ring A Number/Desc | [24611] / Green O-Ring |
| O-Ring B Number/Desc | [24661] / Green O-Ring |
| O-Ring C Number/Desc | [24681] / Green O-Ring |
| Refrigerant Type | R134A |
| Style | w/ Solenoid |
| Suc In Size IN | 0.72 |
| Suc In Size MM | 18.3 |
| Suc Out Size IN | 0.72 |
| Suc Out Size MM | 18.3 |
| Suction Inlet Fitting Gender | Female |
| Suction Inlet Fitting Thread Diameter | No. 10 |
| Suction Inlet Style | Captured O-Ring |
| Suction Inlet Thread Type | Not Threaded |
| Suction Inlet Type | O-Ring |
| Suction Outlet Fitting Gender | Female |
| Suction Outlet Fitting Thread Diameter | No. 10 |
| Suction Outlet Style | Captured O-Ring |
| Suction Outlet Thread Type | Not Threaded |
| Suction Outlet Type | O-Ring |
| Super Heat | 5.000 |
| Switch Included? | Not Included |
| Tonnage | 1.500 |
| Type | Block Type |
| Product line | Expansion Valve |
| Fits | Mitsubishi · 5 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for confident service fit.
Block type design. Compact aluminum construction with captured O-ring connections.
Solenoid included. Built for precise refrigerant flow control in A/C systems.
Cross-references Dorman - First Stop 39070, Pioneer Automotive Industries 759070 and UAC EX10096C for the same application. See all 19.
Four Seasons 39070 Expansion Valve
The Four Seasons 39070 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and captured O-ring connections for a secure seal. It is specified for rear HVAC service on select Mitsubishi Montero and Montero Sport applications, including 2003-2006 Mitsubishi Montero rear and 2004 Mitsubishi Montero Sport rear.
Key Features
- Four Seasons Expansion Valve line, part number 39070
- Block-type A/C expansion valve for R134A refrigerant systems
- Aluminum construction with aluminum finish
- Captured O-ring inlet and outlet connections
- Solenoid-style valve design
- Meets or exceeds OEM specifications
- Set super heat specification: 5.000
- Rear HVAC fitment for Mitsubishi Montero and Mitsubishi Montero Sport
Product Details
Four Seasons 39070 is an A/C expansion valve used to regulate refrigerant flow into the evaporator in rear climate control systems. This block-type valve uses female O-ring fittings with captured seals, including No. 8 liquid inlet and No. 10 liquid outlet connections, plus No. 10 suction inlet and outlet connections. The aluminum construction and OEM-level specification make it a direct service part for rear A/C repair on 2003-2006 Mitsubishi Montero and 2004 Mitsubishi Montero Sport models. This part cross-references UAC EX10096C and EX10168C for the same application.
Common Repair Symptoms
- Rear A/C vent air is warm or inconsistent
- Refrigerant flow is restricted at the evaporator circuit
- System cooling performance drops after compressor service
- Expansion valve sticking or failing to meter refrigerant correctly
- Rear HVAC temperature control becomes unstable
Installation Notes
Verify the vehicle uses R134A refrigerant and confirm rear HVAC configuration before installation. Replace the valve only after the system has been properly evacuated and inspected for contamination, leaks, and damaged O-rings or sealing surfaces. Match the inlet and outlet port sizes and orientation to the original rear A/C layout on the vehicle. Fits 2003-2006 Mitsubishi Montero, rear. Fits 2004 Mitsubishi Montero Sport, rear.
Quality Assurance
Four Seasons lists this expansion valve as meeting or exceeding OEM requirements for the specified application, supporting accurate refrigerant control in rear air conditioning service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2006 | Mitsubishi | Montero | Rear | Expansion Valve |
| 2005 | Mitsubishi | Montero | Rear | Expansion Valve |
| 2004 | Mitsubishi | Montero | Rear | Expansion Valve |
| 2004 | Mitsubishi | Montero Sport | Rear | Expansion Valve |
| 2003 | Mitsubishi | Montero | Rear | Expansion Valve |
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