NDC Engine Connecting Rod Bearing Set 6B1171-030 .030 O/s

( Brand: Ndc ), ( Manufacturer Part Number: 6B1171 ), ( Type: Bearing ), ( Ipn: 6b1171-030 ), ( Location: Kb028 Box C )

Review NDC Engine Connecting Rod Bearing Set .030 O/s Datsun fits 1970–1977

The **NDC 6B1171 Engine Connecting Rod Bearing Set (030 O/S, 1970 1977 Datsun)** represents a meticulously engineered aftermarket solution designed to restore peak performance and longevity to the robust yet aging L-series inline-six engines found in classic Datsun models from the early 1970s. This precision-machined bearing set is specifically tailored for the **030 overhead-short-block (O/S) configuration**, which powers iconic vehicles like the 240Z, Fairlady Z, 510, and 620 series, ensuring an exact fit for the critical load-bearing surfaces of the connecting rods. Crafted from high-grade **lead-bronze alloy**, these bearings are engineered to withstand the intense pressures and temperatures generated by the L-series engine s high-revving, high-stress operation, delivering superior wear resistance and thermal stability compared to original equipment components. The set includes **seven high-quality bearings** four for the main journals and three for the connecting rods each featuring a **thin oil film coating** that enhances lubrication efficiency and minimizes friction, thereby reducing heat buildup and extending engine life. Ideal for both restoration projects and high-performance modifications, this bearing set is a trusted upgrade for enthusiasts seeking to optimize power output while maintaining reliability, making it an indispensable component for preserving the legendary driving dynamics of these timeless Japanese engines.

**Pros and Cons of buying a NDC 6B1171 Engine Connecting Rod Bearing Set (030 O/S, 1970 1977 Datsun)**

1. **Direct Fitment** This bearing set is specifically designed for the 6B1171 engine (commonly found in the Datsun 240Z, Fairlady Z, and 260Z models from 1970 1977). It ensures compatibility without modification, reducing the risk of installation errors.

2. **High-Quality Materials** NDC (National Diesel Components) is a reputable brand known for manufacturing durable, precision-engineered bearings. These bearings are made from high-grade steel with a robust shell and reliable coating, which helps prevent premature wear and failure.

3. **Prevents Engine Damage** Worn or failing connecting rod bearings can lead to catastrophic engine failure, including rod knock, seized pistons, or even a blown engine. Replacing them as part of routine maintenance or when symptoms (like unusual noise or oil consumption) appear can extend the engine s lifespan significantly.

4. **Cost-Effective Maintenance** Compared to the potential cost of repairing or replacing an engine due to bearing failure, this bearing set is relatively inexpensive. It s a small investment that can save thousands in long-term repairs.

5. **Easy Installation** These bearings are designed for straightforward replacement, especially if you have basic mechanical skills or access to a mechanic. The process typically involves removing the engine oil pan, replacing the old bearings, and reinstalling the pan no major disassembly is usually required.

6. **Compatibility with Aftermarket Upgrades** If you ve modified your engine (e.g., increased compression, forced induction, or performance tuning), these bearings may be a better choice than OEM parts, as they are often rated for higher stress and durability.

7. **Widely Available** As a common part for classic Datsun engines, this bearing set is easy to find through online retailers, specialty auto parts stores, or even at swap meets. Availability reduces the risk of delays in obtaining the part.

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1. **Potential for Counterfeit Parts** Since this is a popular aftermarket part, there is a risk of purchasing counterfeit or low-quality replicas, especially if buying from untrusted sellers. Always verify the seller s reputation and check for authenticity markings or packaging.

2. **Requires Proper Installation** While the installation is relatively straightforward, improper handling (e.g., bending the rod caps, incorrect torque, or misalignment) can void the benefits of the bearing set. If unsure, consult a professional mechanic.

3. **Limited Lifespan with Heavy Use** Even high-quality bearings have a finite lifespan, especially under extreme conditions (e.g., high RPM, forced induction, or poor lubrication). Regular oil changes and proper maintenance are essential to maximize their durability.

4. **Cost of Additional Maintenance** Replacing bearings often requires draining and refilling the oil, which may involve additional labor costs if done professionally. You may also need to replace the oil filter and consider using high-quality oil to protect the new bearings.

5. **Risk of Overlooking Underlying Issues** If you re replacing bearings due to symptoms like oil consumption or knocking, there may be other problems (e.g., worn piston rings, valve train issues, or oil leaks) that could recur if not addressed simultaneously. A thorough inspection is recommended.

6. **Environmental and Disposal Considerations** Bearings contain metals and coatings that may not be easily recyclable. Proper disposal or recycling of old bearings is important to minimize environmental impact.

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The NDC 6B1171 connecting rod bearing set is a **highly recommended upgrade or maintenance part** for the 1970 1977 Datsun 6B1171 engine. Its direct fitment, durability, and cost-effectiveness make it a practical choice for both routine maintenance and performance-oriented builds. However, the success of the installation depends on sourcing genuine parts, following proper procedures, and addressing any underlying engine issues.

If you re experiencing symptoms of bearing wear (e.g., rod knock, oil leaks, or increased oil consumption), replacing these bearings is a **proactive step** to avoid costly engine damage. For those performing regular maintenance, this bearing set is a wise investment to ensure long-term reliability.

- **Purchase from a trusted supplier** (e.g., reputable online retailers, specialty auto parts stores, or known classic car part dealers) to avoid counterfeit products.

- **Follow the manufacturer s installation guidelines** carefully, or have a mechanic perform the replacement if you lack experience.

- **Combine this replacement with other maintenance tasks** (e.g., oil filter change, valve adjustment, or piston ring inspection) to maximize engine health.

- **Use high-quality oil** (e.g., synthetic or full synthetic) to protect the new bearings and extend their lifespan.

- **Monitor the engine post-installation** for any unusual noises or performance issues, which could indicate improper installation or other problems.

For most Datsun 6B1171 owners, this bearing set is a **smart, cost-effective choice** that enhances engine longevity and reliability.

Details:

The quoted shipping prices are within the 48 states only. This listing is for: NDC Engine Connecting Rod Bearing Set .030 U/S Part no: 6B1171 Fits: 1970-1977 Datsun, application for reference only.

part #: 6b1171 prices

• $11.19-$42.00

specifications pistonrinro:

• for makes: Datsun
• for years: 1970-1977
• brand: Ndc
• mpn: 6b1171
• type: Bearing
• ipn: 6b1171-030
• location: Kb028 Box C

offer pistonrinro:

• options: Ship-to-home
• sold: 0
• quantity: 4
• started: February 2, 2026
• availability: In Stock
• best offers: True

general pistonrinro:

• Car Truck Parts Accessories > Engines Engine Parts > Connecting Rods Parts
• condition: New other see details

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seller pistonrinro:

• rating: 99.8%
• city: Ontario, California
• # reviews: 32076

returns pistonrinro:

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

shipping pistonrinro:

• type: Fixed
• service: Standard
• cost: $8.99
• transit: 3-8 Days
• class: Standard

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