1. USED Car/Truck Carburetors Items
  2. sku: 8652319475002793
  3. GM ROCHESTER 7012339

GM / ROCHESTER 7012339 Nos Carburetor Pump Plunger 4BC

fits make: Oldsmobile. year: 1958.

7012339 Gm / Rochester Nos Carburetor Pump Plunger Assembly 1958 Oldsmobile With 4bc

( Brand: Gm / Rochester ), ( Manufacturer Part Number: 7012339 ), ( Type: Carburetor )

Review GM / ROCHESTER Nos Carburetor Pump Plunger Assembly Oldsmobile 4bc fits 1958

The GM Rochester 7012339 carburetor pump plunger is a crucial component for the 1958 Oldsmobile 4BC engine. This plunger is designed to effectively move fuel from the carburetor bowl to the engine for a smooth and efficient combustion process.

Measuring approximately 2.5 inches in length and 1.5 inches in diameter, this plunger is specifically engineered to fit the 1958 Oldsmobile 4BC carburetor models. Its durable construction is made from high-quality materials that can withstand the rigors of regular use, ensuring long-lasting performance.

The plunger features a polished finish that not only enhances its aesthetic appeal but also provides resistance to corrosion and wear. The plunger's head is flat, allowing for a snug fit within the carburetor pump housing, while the stem is tapered for easy installation and removal.

The plunger's seal is made from a specially formulated rubber material that provides an airtight seal, preventing fuel from leaking out and maintaining proper fuel pressure within the carburetor. This seal ensures optimal engine performance and fuel efficiency.

Installing the GM Rochester 7012339 carburetor pump plunger is a straightforward process. Simply remove the old plunger, clean the carburetor housing, and carefully install the new plunger, making sure the seal is properly seated.

In summary, the GM Rochester 7012339 carburetor pump plunger is an essential part for maintaining the performance and fuel efficiency of a 1958 Oldsmobile 4BC engine. Its durable construction, precise fit, and effective seal ensure reliable operation and long-lasting performance.

Pros and Cons of Buying GM Rochester 7012339 NOS Carburetor Pump Plunger for a 1958 Oldsmobile 4BC

**Background:**

The GM Rochester 7012339 NOS (New Old Stock) Carburetor Pump Plunger is a replacement part designed for use in 1958 Oldsmobile 4BC models. This part is essential for maintaining the proper function of the carburetor, which controls the fuel mixture that powers the engine.

**Pros:**

1. **Authentic and Genuine:** NOS parts, like the 7012339, are original manufacturer-produced components. They are identical to the parts that came with the vehicle when it was new.

2. **Reliability:** Given their original manufacturing, NOS parts are often perceived to be more reliable than aftermarket alternatives.

3. **Fit and Function:** NOS parts are designed to fit perfectly and function as intended, reducing the likelihood of compatibility issues or additional modifications.

**Cons:**

1. **Cost:** NOS parts can be significantly more expensive than their aftermarket counterparts due to their scarcity and the fact that they are no longer in production.

2. **Availability:** NOS parts may be harder to find because they are not mass-produced. This could lead to longer wait times for delivery or even unavailability.

3. **Limited Use:** Since NOS parts are original, they are not reusable once installed or if they fail.

**Conclusion:**

The decision to buy the GM Rochester 7012339 NOS Carburetor Pump Plunger for a 1958 Oldsmobile 4BC depends on personal preferences and priorities. If preserving authenticity and reliability is a priority, then purchasing a NOS part may be the best choice. However, if cost and availability are significant factors, an aftermarket alternative may be a more feasible option.

**Recommendation:** To make an informed decision, consider the following steps:

1. Assess the importance of authenticity and reliability in your restoration project.

2. Determine your budget for the carburetor pump plunger and factor in the potential cost difference between NOS and aftermarket parts.

3. Research the availability of both NOS and aftermarket alternatives and consider the potential wait times for delivery.

4. Evaluate the long-term implications of choosing a NOS part, such as the lack of reusability and potential need for future replacements.

5. Weigh the pros and cons and make a decision based on your priorities and circumstances.

Details:

Up for Buy-It-Now is a new stock carburetor pump plunger assembly, Rochester part number 7012339. W/ 4BC, The assembly is in brand new, never used condition and free of any damage. The original box is in good condition. Please feel free to E-mail me questions.

According to my Rochester manual, this is used on the following model's and years: 1958 Oldsmobile.

part #: 7012339 price

  • $30.00

specifications carbcoon:

  • for makes: Oldsmobile
  • for years: 1958
  • brand: Gm / Rochester
  • mpn: 7012339
  • type: Carburetor

shipping carbcoon:

  • class: Standard, Expedited
  • cost: $8.55
  • service: USPS Ground Advantage, USPS Priority Mail
  • type: Calculated
  • carrier: USPS
  • transit: 3-7 Days

payments carbcoon:

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  • credit card: Discover

returns carbcoon:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Seller

seller carbcoon:

  • rating: 100.0%
  • city: Portage, Ohio
  • # reviews: 7282

offer carbcoon:

  • sold: 0
  • started: October 27, 2025
  • quantity: 1
  • options: Ship-to-home
  • availability: In Stock

general carbcoon:

  • condition: New
  • Car Truck Parts Accessories > Air Fuel Delivery > Carburetors
for makes: oldsmobile, for years: 1958, type: carburetor,
category: auto parts > car truck parts accessories > air fuel delivery > carburetors, sku: 8652319475002793,

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1 offer $30.00 USD
  • Offer #1: $30.00 price + $14.00 shipping estimate = $44.00* total.+$14.00 shipping

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