OE Quality
60-Day Returns

Standard Ignition AV31 Secondary Air Injection Pump Check Valve
Overview of Standard Ignition Secondary Air Injection Pump Check Valve
The Standard Ignition AV31 Secondary Air Injection Pump Check Valve is designed to maintain proper airflow in the emission control system of select Dodge and Plymouth vehicles. This valve ensures efficient operation of the secondary air injection pump, helping to reduce harmful emissions in your Caravan or Voyager.
- Compatible with Dodge Caravan and Plymouth Voyager models
- Valve content designed for durability and reliable performance
- 3/4 inch hose size for precise fitment
- 3/4" x 14 NPT thread size for secure installation
Product Details and Specifications
The AV31 check valve from Standard Ignition is engineered to fit the secondary air injection system of Dodge Caravan and Plymouth Voyager vehicles. It features a 3/4 inch hose size, which corresponds to approximately 19 mm, ensuring compatibility with the existing air injection hoses. The valve includes a 3/4" x 14 NPT thread size, providing a secure and leak-free connection within the emission control system. This part is essential for preventing backflow of exhaust gases and maintaining the proper function of the secondary air injection pump.
Purpose and Common Applications
This secondary air injection pump check valve is used to:
- Prevent exhaust gases from flowing back into the air injection pump
- Maintain proper air pressure within the emission control system
- Support the reduction of harmful emissions during cold engine starts
- Ensure compliance with emission standards for Dodge Caravan and Plymouth Voyager
- Help avoid damage to the secondary air injection pump caused by backflow
Installation Notes and Tips
When installing the Standard Ignition AV31 check valve, ensure the hose size matches the 3/4 inch specification for a proper seal. Use the 3/4" x 14 NPT thread size to securely fasten the valve in place. It is recommended to inspect the surrounding hoses and connections for wear or damage during installation. Proper orientation of the valve is critical to prevent backflow and maintain system efficiency.
Quality Assurance and Warranty
Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance in emission control systems. The AV31 check valve undergoes rigorous quality control to provide durability and consistent operation. Warranty coverage details are available through Standard Ignition and typically cover defects in materials and workmanship under normal use.
| Brand | Standard Ignition |
|---|---|
| Part Number | AV31 |
| Contents | Valve |
| Hose Size - Inches | 3/4 |
| Hose Size - mm | Refer to Inches |
| Thread Size - NPT | 3/4" x 14 |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1987 | Dodge | Caravan | 2.2L | L4 | N/A | To Exhaust Manifold |
| 1986 | Dodge | Caravan | 2.2L | L4 | N/A | To Exhaust Manifold |
| 1985 | Dodge | Caravan | 2.2L | L4 | N/A | To Exhaust Manifold |
| 1985 | Plymouth | Voyager | 2.2L | L4 | N/A | w/ Tube To Exhaust Manifold |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.