1. Pistons, Rings, Rods & Parts Engines Components For Sale
  2. sku: 13081411823943722
  3. PERFECT CIRCLE 3111816

PERFECT CIRCLE 3111816 Nos Piston Ring Set .030 O.s.

fits model: 600, Nash. year: 1941–1948.

3111816 Perfect Circle Nos .030 O.s. Piston Ring Set 1941 1942 1946 1947 1948 Nash Inch 600 Six Us

( Brand: Perfect Circle ), ( Manufacturer Part Number: 3111816 ), ( Type: Piston Ring Set ), ( Items Included: Piston Rings )

Review PERFECT CIRCLE Nos .030.s. Piston Ring Set Inch Six Us fits NASH 600 1941–1948

The **Circle 3111816 No. 030 Original Specification Piston Ring Set** is a meticulously crafted, high-performance replacement part designed to restore the peak efficiency and longevity of the iconic **Nash 600** engines from the model years **1941 through 1948**. This precision-engineered set features **original-specification piston rings** that replicate the exact dimensions, tolerances, and material composition of the factory-installed components, ensuring seamless integration with the engine s internal architecture. Crafted from **high-quality cast iron** with a **compression ring** featuring a **barrel-shaped cross-section** and a **top ring groove** designed to minimize oil consumption while maximizing sealing performance, this set is engineered to withstand the rigorous demands of vintage automotive use. The **second ring**, typically a **wiping or oil control ring**, is precision-ground to maintain optimal lubrication within the cylinder bore, reducing friction and preventing excessive wear on both the rings and the cylinder walls. The **third ring**, if included, may serve as an additional oil control or scraper ring, further enhancing durability and efficiency. Each ring is **carefully machined** to the original specifications, including the correct **end gaps, radial thicknesses, and barrel profiles**, ensuring a perfect fit within the piston grooves of the Nash 600 s **6-cylinder inline engine** (commonly referred to as the "Ambassador" or "Statesman" variants). Whether restoring a classic Nash 600 to its original glory or upgrading an existing engine for improved performance, this **O.S. (Original Specification) piston ring set** delivers the reliability and precision needed to maintain peak mechanical integrity. Ideal for enthusiasts seeking authenticity, this set is a must-have for those who demand nothing less than factory-accurate performance in their beloved pre-war American automobile.

### Pros and Cons of buying a 3111816 No. 030 O.S. Piston Ring Set for Nash 600 (1941 1948)

#### **Pros:**

1. **Compatibility and Fit:** This piston ring set is specifically designed for the Nash 600 engine models from 1941 to 1948, ensuring a proper fit without requiring excessive modification. The O.S. (Original Service) designation suggests it aligns with the factory specifications, reducing the risk of clearance issues or premature wear.

2. **Performance and Reliability:** Properly fitted piston rings improve engine compression, fuel efficiency, and power output. If the original rings are worn or damaged, replacing them with an OEM or high-quality aftermarket set like this can restore the engine s performance to near-new condition. This is particularly valuable for classic cars where maintaining originality while improving reliability is key.

3. **Authenticity for Restoration:** For enthusiasts restoring a Nash 600 to its original condition, using an O.S. piston ring set ensures historical accuracy. These parts are often sourced from original equipment manufacturers or carefully reproduced to match factory standards, which can be appealing for collectors or show cars.

4. **Durability and Longevity:** High-quality piston rings, even if not brand-new, can significantly extend the life of the engine by reducing friction, controlling oil consumption, and maintaining proper sealing. This is especially important for older engines that may have accumulated wear over decades.

5. **Ease of Installation:** Since these rings are designed for the Nash 600, they should be easier to install than aftermarket rings meant for other engines. The correct dimensions and tolerances reduce the risk of installation errors that could damage the engine or rings.

6. **Availability of Supporting Parts:** As a classic car part, you may find other compatible components (e.g., gaskets, seals, or related engine parts) available from the same manufacturer or period-specific suppliers, simplifying the restoration process.

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#### **Cons:**

1. **Age and Wear:** Even if the rings are in good condition, they may have been stored for decades, leading to potential issues like rust, dryness, or degradation of the materials. This could affect their performance or require additional preparation (e.g., cleaning, lubrication) before installation.

2. **Cost:** High-quality or OEM-replica piston ring sets can be expensive, especially for classic cars where parts are less mass-produced. The price may be disproportionate to the engine s current value or the intended use (e.g., a daily driver vs. a show car).

3. **Source Reliability:** The authenticity and quality of the rings depend entirely on the seller. Counterfeit or poorly reproduced parts may not meet OEM standards, leading to premature failure or poor performance. Always verify the seller s reputation and the origin of the parts (e.g., original Nash parts, reputable aftermarket suppliers, or eBay/AuctionHouse listings with clear provenance).

4. **Engine Condition Dependence:** If the rest of the engine (e.g., cylinders, pistons, or crankshaft) is severely worn, replacing just the piston rings may not fully resolve performance issues. A comprehensive engine rebuild might be necessary, adding to the cost and complexity.

5. **Limited Availability of Tools/Expertise:** Installing piston rings, especially in older engines, requires specific tools (e.g., ring compressors, feeler gauges) and expertise. If you lack experience, hiring a professional mechanic could increase costs.

6. **Potential for Compatibility Issues:** While the rings are designed for the Nash 600, slight variations in engine modifications (e.g., cylinder boring, custom pistons) could create clearance problems. Always measure the cylinder bore and piston dimensions to ensure the rings will fit correctly.

7. **Time-Consuming Process:** Replacing piston rings is a labor-intensive job that requires disassembling the engine, cleaning components, and carefully installing the rings. This can be time-consuming, especially for someone unfamiliar with the process.

---

### **Conclusion:**

Buying the **3111816 No. 030 O.S. piston ring set for the Nash 600 (1941 1948)** is a worthwhile investment if you are restoring or maintaining a classic engine where authenticity, performance, and reliability are priorities. The rings offer a direct replacement for factory parts, improving compression and reducing oil consumption. However, the decision should be weighed against the potential drawbacks, such as cost, the condition of the rest of the engine, and the need for specialized tools or expertise.

If your Nash 600 is a project car or a restoration target, these rings are a strong choice for preserving or enhancing its original character. For a daily-driven classic, ensure the rest of the engine is in good condition to justify the expense. Always purchase from a trusted source and verify the condition of the rings before installation.

### **Recommendation:** - **Proceed with purchase** if:

- You are restoring a Nash 600 to original specifications.

- The engine is otherwise in good condition (or you plan to address other wear simultaneously).

- You have access to the tools and expertise needed for proper installation.

- The seller provides clear documentation or provenance (e.g., original Nash parts or a reputable aftermarket supplier).

- **Avoid or research alternatives** if:

- The engine has significant wear beyond the piston rings (e.g., scored cylinders, worn crankshaft).

- You are unsure about the quality or authenticity of the rings from the seller.

- The cost exceeds your budget or the car s value, and you cannot justify the expense for your intended use.

For maximum confidence, consider consulting a classic car mechanic or engine specialist to inspect the engine and rings before installation. This can help identify any hidden issues and ensure the rings will perform as expected.

Details:

Box was sealed. 30 over 1941 to 1948. Some have discoloration from age. Nos Bird piston rings.

part #: 3111816 prices

  • $9.45-$10.17

specifications pistonringro:

  • for models: 600, Nash
  • for years: 1941-1948
  • brand: Perfect Circle
  • mpn: 3111816
  • type: Piston Ring Set
  • items included: Piston Rings

offer pistonringro:

  • availability: In Stock
  • options: Ship-to-home
  • best offers: True
  • sold: 0
  • started: May 18, 2026
  • quantity: 1

shipping pistonringro:

  • class: Standard
  • cost: $8.95
  • type: Fixed
  • transit: 3-10 Days
  • carrier: USPS
  • service: USPS Ground Advantage

seller pistonringro:

  • # reviews: 16175
  • city: Hillsboro, Iowa
  • rating: 100.0%

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general pistonringro:

  • Car Truck Parts Accessories > Engines Engine Parts > Pistons Rings
  • condition: For parts or not working

returns pistonringro:

  • paid by: Seller
  • policy: Returns Accepted
  • time: 30 Days
for models: 600, nash, for years: 1941-1948, type: piston ring set, items included: piston rings,
category: auto parts > car truck parts accessories > engines engine parts > pistons rings, sku: 13081411823943722,
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2 offers $9.45–$10.17 USD
  • Used. Offer #1 priced at $10.17 + $7.27 shipping estimate = $17.44* total. +$7.27 shipping
  • Used. Offer #2 priced at $9.45 + $5.81 shipping estimate = $15.26* total. +$5.81 shipping

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