GM 17072851 Nos Delco Diverter Valve Sec Air Inj General Sec. Inj. Sw.

( Brand: Gm ), ( Manufacturer Part Number: 17072851 ), ( Part Type: Valve Motor )

Review GM General Motors Vtg Nos Oem Delco Diverter Valve Sec. Air Inj. Made In Usa

The **General Motors (GM) Delco Remy 17072851 vintage NOS (New Old Stock) Diverter Valve for Secondary Air Injection System** is a meticulously preserved, high-performance component designed to enhance emissions control in older GM vehicles equipped with secondary air injection systems. Originally manufactured by Delco Remy, a trusted name in automotive electrical and emissions technology, this diverter valve plays a critical role in optimizing engine efficiency and reducing harmful exhaust emissions during the post-cranking phase. Crafted from durable materials and featuring a robust, corrosion-resistant construction, this NOS unit retains its original functionality while offering a reliable alternative to modern aftermarket replacements. The diverter valve operates by directing air from the secondary air pump into the exhaust manifold or catalytic converter, ensuring proper combustion and minimizing unburned fuel and pollutants during engine warm-up. Its precise engineering and seamless integration with GM s emissions systems make it an ideal choice for vintage vehicles, classic muscle cars, and restored GM engines from the late 1970s through the early 1990s. Whether restoring a classic Chevrolet, Pontiac, or Buick, this NOS diverter valve ensures peak performance and compliance with original emissions standards, making it a must-have for enthusiasts seeking both authenticity and functionality.

### **Pros and Cons of Buying a Vintage GM Delco Diverter Valve (17072851, NOS, for Secondary Air Injection System)**

1. **Original Equipment Quality (OEM)** Since this is a **New Old Stock (NOS)** part, it was manufactured to GM s original specifications, ensuring proper fit, function, and durability compared to aftermarket alternatives.

2. **Reliability** GM s older mechanical components, particularly those from the **1970s 1990s**, were built to last under normal operating conditions. A well-maintained diverter valve should function reliably for years.

3. **Compatibility** This part is specifically designed for **GM secondary air injection systems**, which were used in **pre-catalytic converter engines** (common in **1975 1995 GM vehicles**). It will fit seamlessly into systems requiring air injection for better cold-start emissions control.

4. **Easier to Source Than Modern Parts** Some older GM air injection systems are harder to find in working condition, making NOS parts a practical choice for restorers or mechanics working on classic vehicles.

5. **No Electronic Dependencies** Unlike modern air injection systems, this mechanical diverter valve does not rely on complex electronics, reducing potential failure points.

6. **Potential for Long-Term Use** If the vehicle is restored or maintained properly, this part could remain functional for decades, avoiding repeated replacements.

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1. **Age-Related Wear** Even if NOS, the part may show signs of **aging (rust, corrosion, or internal wear)**. A thorough inspection is necessary to ensure it s fully functional.

2. **Limited Availability** NOS parts for older GM systems are becoming **rarer and more expensive** as demand increases. Prices may be higher than expected.

3. **Potential for Counterfeit or Rebuilt Parts** Some sellers may pass **rebuilt or remanufactured** parts as NOS. Always verify the part s history and condition before purchasing.

4. **Compatibility Issues with Modern Vehicles** If installed in a **modern vehicle with emissions controls**, it may not integrate well with updated systems, potentially causing **check engine lights or performance issues**.

5. **Maintenance Requirements** Mechanical diverter valves require **periodic cleaning and lubrication** to prevent sticking or failure, especially in environments with dust or moisture.

6. **No Warranty or Return Options** NOS parts typically come with **no warranty**, and returns may be difficult if the part fails shortly after installation.

7. **Potential for Obsolete Design Flaws** Older GM components may have **design weaknesses** (e.g., brittle seals, weak springs) that modern parts have since addressed.

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Buying a **GM Delco Diverter Valve (17072851, NOS)** is a **good choice for enthusiasts restoring or maintaining classic GM vehicles** with secondary air injection systems. The **OEM quality, reliability, and mechanical simplicity** make it a strong option for those prioritizing authenticity and durability. However, **potential age-related issues, limited availability, and lack of warranty** mean buyers must **inspect the part carefully, verify its condition, and consider long-term maintenance needs**.

For **modern vehicles or high-mileage applications**, a **rebuilt or aftermarket alternative** might be more practical, but for **classic car restorations**, the NOS part remains a **preferred solution** when sourced responsibly.

- **Buy NOS** if the price is reasonable and the part is in good condition.

- **Inspect thoroughly** for rust, leaks, or internal damage.

- **Consider a rebuild kit** if the part shows wear but is otherwise salvageable.

- **Opt for a rebuilt or aftermarket diverter valve** with a warranty.

- **Check for OEM-equivalent parts** from trusted suppliers.

- **Always verify the part s authenticity** (check serial numbers, seller reputation, and condition before purchasing).

Details:

Vintage NOS OEM GM Delco Part GM # 17072851 Diverter Valve Secondary Air Injection Switch Original Factory Box Made In The USA!!, Please view all pictures for item condition.

part #: 17072851 prices

• $150.00-$250.00

specifications intakefuelmotorcycle:

• brand: Gm
• mpn: 17072851
• part type: Valve Motor

general intakefuelmotorcycle:

• condition: New other see details
• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery

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• quantity: 1
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• started: March 5, 2026
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• city: Dayton, Nevada
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• # reviews: 447

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