1. Engine Crankshafts Products
  2. sku: 19339342752917793
  3. CHEVY 5466312

CHEVY 5466312 Nos Engine Crankshaft Bearing General BEARING/1

fits make: Chevy, Buick, Cadillac, Oldsmobile. year: 1982-90.

5466312 General Motors 1982-90 Chevy/buick/cadillac/oldsmobile Nos Engine Crankshaft Bearing/1

( Brand: Chevy ), ( Manufacturer Part Number: 5466312 ), ( Part Type: Bearing Engine Crankshaft Motor ), ( Items Included: Bearing ), ( Manufacturer Warranty: No ), ( Performance Part: Yes ), ( Finish: Nos ), ( California Prop 65 Warning: Warning, Servicing And Maintaining A Passenger Vehicle Or Off-highway Motor Vehicle Can Expose You To Chemicals Including Engine Exhaust, Carbon Monoxide, Phthalates, And Lead, Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. To Minimize Exposure, Avoid Breathing Exhaust, Do Not Idle The Engine Except As Necessary, Service Your Vehicle In A Well-ventilated Area And Wear Gloves Or Wash Your Hands Frequently When Servicing Your Vehicle. For More Information Go To Www.p65warnings.ca.gov/passenger-vehicle. ), ( Color: Sliver ), ( Country Of Origin: United States ), ( Item: Tracy Corvette 2362 )

Review CHEVY General Motors 1982 90 Chevy/buick/cadillac/oldsmobile Nos Engine Crankshaft Bearing/1 fits 1982-90

The **1982-1990 Chevrolet, Buick, Cadillac, and Oldsmobile 5466312 Original Equipment (OEM) Engine Crankshaft Bearing** is a precision-engineered component designed to ensure smooth, reliable operation within the robust 305 cubic-inch (5.0L) V8 engine family produced by General Motors during this era. This bearing is a critical part of the main bearing assembly, positioned between the crankshaft journals and the engine block s bearing caps, where it plays a pivotal role in supporting the crankshaft s rotational load while minimizing friction and wear. Crafted from high-grade, heat-treated steel with a specialized shell construction, this bearing features a robust, oil-impregnated bronze lining that enhances lubrication retention and durability under high-stress conditions, making it ideal for the demanding performance requirements of these classic GM powerplants. The design adheres to the exact specifications of the original equipment manufacturer, ensuring a perfect fit with the engine s crankshaft journals and bearing caps, which are typically 2.250 inches in diameter for the main journals. This bearing is engineered to withstand the thermal expansion and mechanical stress inherent in high-performance applications, whether in daily driving, street rod restorations, or even light custom builds, where reliability and longevity are paramount. Its seamless integration with the engine s lubrication system ensures consistent oil flow, reducing the risk of premature failure and extending the life of the entire crankshaft assembly. For enthusiasts and mechanics restoring or maintaining these iconic engines, this bearing serves as an essential replacement part, offering the same level of performance and durability as the original, thereby preserving the integrity and character of the vehicle s heritage powerplant.

### **Pros and Cons of Buying a 1982 1990 Chevy/Buick/Cadillac/Oldsmobile with a NOS Engine and Crankshaft Bearing (General 5466312)**

#### **Pros**

1. **Reliability and Durability** The **General Motors 5466312** (a variant of the **350/400ci V8**) is a well-proven engine design that was widely used in GM s full-size trucks, SUVs, and muscle cars during the 1980s. When properly maintained, these engines are known for longevity, especially when paired with a **new crankshaft bearing** (part 5466312), which helps prevent catastrophic failure from wear.

2. **Availability of Parts** Due to its widespread use, finding replacement parts (belts, hoses, gaskets, sensors, etc.) is relatively easy. Aftermarket support is strong, with options ranging from OEM replacements to upgraded performance parts.

3. **Modularity and Upgrade Potential** The **350/400ci V8** platform allows for various modifications, including:

- **Performance upgrades** (intake manifolds, headers, camshafts, fuel system improvements).

- **Fuel injection conversions** (from carbureted to EFI or even modern fuel management systems).

- **Cylinder head swaps** (e.g., replacing stock heads with high-performance or turbocharged variants).

- **Crankshaft and bearing upgrades** (if the original bearing was worn, a new one extends life).

4. **Lower Cost of Ownership (Compared to Modern Engines)** Fuel efficiency is modest (around **12 16 MPG** in a truck/SUV setup), but maintenance costs are generally lower than those of modern turbocharged or high-compression engines. A **new crankshaft bearing** is a relatively inexpensive insurance policy against engine failure.

5. **Classic Vehicle Appeal** If you re restoring or modifying a **1982 1990 Chevy/GMC truck, Buick Roadmaster, Cadillac Fleetwood, or Oldsmobile 88/98**, this engine is a solid choice for a **rebuild or replacement**. The **NOS (New Old Stock) condition** ensures you re getting a high-quality, pre-owned engine that hasn t been abused.

6. **Easy to Work On** These engines are **relatively simple** compared to modern fuel-injected or turbocharged powerplants. Basic repairs (valve adjustments, timing belt changes, oil pan replacements) can be done with minimal specialized tools.

7. **Potential for High Horsepower (With Mods)** While stock, these engines produce ** 150 200 HP**, but with **performance camshafts, headers, and fuel system upgrades**, they can easily reach **300 400 HP** without excessive stress on the crankshaft or bearings.

---

#### **Cons**

1. **Poor Fuel Economy** Expect **12 16 MPG** in a truck/SUV setup, which is significantly worse than modern diesel or turbocharged engines. If fuel efficiency is a priority, this engine is not ideal.

2. **Outdated Emissions and Fuel System** Many of these engines were **carbureted or early EFI**, meaning they don t meet modern emissions standards. Running one legally in some areas may require **exhaust modifications, smog compliance, or a switch to EFI**.

3. **Potential for Hidden Issues** Even a **NOS engine** may have:

- **Worn rod bearings** (not just the crankshaft bearing).

- **Leaking head gaskets** (common in older GM V8s).

- **Rod knock or internal damage** (if the engine was previously abused).

- **Fuel system problems** (vacuum leaks, failing carburetors, or EFI sensors).

A **pre-purchase inspection (PPI)** is **highly recommended** before buying.

4. **Noisy Operation** These engines can be **loud**, especially if they re running with stock components. Modern mufflers and exhaust systems may be needed for a quieter ride.

5. **Limited Modern Technology Integration** If you want **OBD-II diagnostics, modern fuel management, or advanced performance tuning**, you ll need to invest in **aftermarket ECUs or wiring harnesses**, which adds complexity.

6. **Crankshaft Bearing Wear Over Time** Even with a **new crankshaft bearing (5466312)**, the **rod bearings** and **main bearings** may still be worn if the engine was previously neglected. A **full engine rebuild** (including rod bearings) may be necessary for long-term reliability.

7. **Resale Value is Low** Unlike modern trucks or high-demand classics, these engines **do not hold value well**. If you plan to sell later, the **original engine s condition (even NOS) won t fetch a premium**.

8. **Potential for Overheating** Older cooling systems (water pumps, thermostats, radiators) can fail, leading to **engine damage** if not addressed. A **cooling system overhaul** is often needed alongside the crankshaft bearing replacement.

---

### **Ending Conclusion**

Buying a **1982 1990 Chevy/Buick/Cadillac/Oldsmobile with a NOS engine and new crankshaft bearing (5466312)** can be a **great choice** if you:

- **Prioritize reliability and mod potential** over fuel efficiency.

- **Plan to maintain the engine properly** (oil changes, cooling system checks, rod bearing monitoring).

- **Are restoring a classic vehicle** where the engine s character is part of the appeal.

- **Are willing to invest in upgrades** (fuel system, exhaust, cooling) to make it street-legal and efficient.

However, it is **not the best choice** if you:

- **Need high fuel economy** (modern diesels or hybrids are far more efficient).

- **Want a plug-and-play, low-maintenance engine** (modern turbocharged or hybrid systems require less upkeep).

- **Are buying without a thorough inspection** (hidden internal damage can turn a NOS engine into a money pit).

- **Plan to keep the vehicle long-term without modifications** (these engines are loud, thirsty, and outdated by today s standards).

---

### **Final Recommendation**

**Buy it if:**

You re restoring a **1980s GM classic** and want a **reliable, mod-friendly engine**.

You **inspect it thoroughly** (or have a mechanic do so) before purchase, checking for **rod bearing wear, head gasket leaks, and fuel system issues**.

You re **prepared to invest in upgrades** (cooling system, exhaust, fuel injection) to make it **legal and efficient**.

You **enjoy working on engines** and don t mind the **noise and lower fuel economy**.

**Avoid it if:**

You **need a daily driver with high MPG** (modern trucks or hybrids are better).

You **can t commit to regular maintenance** (these engines fail when neglected).

You **don t want to deal with emissions or exhaust modifications** (some states require smog-compliant setups).

You **find a better alternative** (e.g., a **modern diesel, turbocharged V6, or a rebuilt modern V8** with better reliability).

**Best Approach:**

- **Get a pre-purchase inspection** (focus on **rod bearings, head gaskets, and fuel system**).

- **Consider a full rebuild** (not just the crankshaft bearing) if the engine has high mileage.

- **Upgrade the cooling system, exhaust, and fuel delivery** to improve reliability and drivability.

- **Budget for long-term maintenance** (oil changes every **3,000 5,000 miles**, cooling system flushes, etc.).

**Final Verdict:**

This engine is a **solid choice for enthusiasts and restorers**, but **not ideal for casual buyers or those seeking modern efficiency**. If you re **passionate about classic GM power and willing to put in the work**, it s a **great investment**. If you want **convenience and efficiency**, look elsewhere.

Details:

Next, select a topic, or choose Other. Smaller items are shipped Standard USA Postal Service or USPS Priority Mail. Keep Your GM Car All.

part #: 5466312 prices

  • $29.00-$29.99

specifications cranshafengin:

  • for makes: Chevy, Buick, Cadillac, Oldsmobile
  • for years: 1982-90
  • brand: Chevy
  • mpn: 5466312
  • part type: Bearing Engine Crankshaft Motor
  • items included: Bearing
  • manufacturer warranty: No
  • performance part: Yes
  • finish: Nos
  • california prop 65 warning: Warning, Servicing And Maintaining A Passenger Vehicle Or Off-highway Motor Vehicle Can Expose You To Chemicals Including Engine Exhaust, Carbon Monoxide, Phthalates, And Lead, Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. To Minimize Exposure, Avoid Breathing Exhaust, Do Not Idle The Engine Except As Necessary, Service Your Vehicle In A Well-ventilated Area And Wear Gloves Or Wash Your Hands Frequently When Servicing Your Vehicle. For More Information Go To Www.p65warnings.ca.gov/passenger-vehicle.
  • color: Sliver
  • country of origin: United States
  • item: Tracy Corvette 2362

returns cranshafengin:

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

general cranshafengin:

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

offer cranshafengin:

  • started: March 16, 2026
  • availability: In Stock
  • quantity: 1
  • options: Ship-to-home
  • best offers: True
  • sold: 0

shipping cranshafengin:

  • carrier: USPS
  • type: Fixed
  • class: Expedited
  • service: USPS Priority Mail
  • transit: 4-9 Days
  • cost: $16.00

payments cranshafengin:

  • other
  • wallet: Paypal
  • credit card: Mastercard

seller cranshafengin:

  • city: Roseville, Michigan
  • rating: 99.4%
  • # reviews: 21905
for makes: chevy, buick, cadillac, oldsmobile, for years: 1982-90, part type: bearing engine crankshaft motor, items included: bearing, manufacturer warranty: no, performance part: yes, finish: nos, california prop 65 warning: warning, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the state of california to cause cancer and birth defects or other reproductive harm. to minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. for more information go to www.p65warnings.ca.gov/passenger-vehicle., country of origin: united states, item: tracy corvette 2362,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, color: sliver, sku: 19339342752917793,
Chevy 5466312 Is Similar To:
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2 offers $29.00–$29.99 USD
  • New. Offer #1 priced at $29.99 + $0.00 shipping estimate = $29.99* total. THIS SALE IS FOR 1 BEARING SET, THERE ARE 2 AVAILABLE. NOS OEM GM# MAIN ENGINE BEARING.FREE SHIPPING
  • New other (see details). Offer #2 priced at $29.00 + $16.00 shipping estimate = $45.00* total. "Keep Your GM Car All GM!".+$16.00 shipping

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