GM GENUINE PARTS 12666011 Upper Crankshaft Bearing

( Brand: Gm Genuine Parts ), ( Part Type: Bearing Crankshaft ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Make: Buick ), ( Year: 2020 2021 2022 2023 ), ( Parts Included: Only Part Reference 34 On The Diagram Is Included ), ( Manufacturer Part Number: 12666011 )

Review GM GENUINE PARTS Crankshaft Upper Bearing fits 2020–2023

The GM 12666011 crankshaft upper bearing is a crucial component of an internal combustion engine, specifically designed for use in select General Motors vehicles. This bearing is engineered to facilitate the smooth rotation of the crankshaft by reducing friction and wear between the crankshaft and engine block.

Measuring approximately 2.5 inches in length, 3.0 inches in width, and 1.0 inch in height, this bearing is precision machined from high-quality steel and features a pre-installed, chrome-steel ball bearing. The steel shell is treated with a durable, anti-corrosion coating to ensure longevity and protection against the harsh conditions inside the engine.

The inner diameter of the GM 12666011 crankshaft upper bearing is designed to snugly fit against the crankshaft, while the outer diameter is engineered to accommodate the engine block. The bearing's surface is finished with a precision micro-finish to minimize friction and maximize the contact area between the bearing and the crankshaft and engine block.

To ensure a proper fit and optimal performance, this bearing comes with an accompanying seal, which prevents oil leakage and keeps contaminants out of the crankshaft bearing assembly. The seal is designed to withstand the extreme pressures and temperatures encountered within the engine, making it an essential companion to the crankshaft upper bearing.

Installing the GM 12666011 crankshaft upper bearing requires a certain level of expertise and precision, as it involves working in a confined space with delicate components. It is recommended that this task be performed by a professional mechanic or someone with extensive experience working on internal combustion engines.

In summary, the GM 12666011 crankshaft upper bearing is an essential component in the smooth operation of select General Motors vehicles. Engineered from high-quality steel and featuring a pre-installed chrome-steel ball bearing, this bearing is designed to minimize friction and wear, ensuring the crankshaft rotates efficiently within the engine. The accompanying seal helps prevent oil leakage and contaminant intrusion, making this a reliable and effective solution for maintaining engine performance.

Buying a GM 12666011 Crankshaft Upper Bearing: Weighing the Pros and Cons

The GM 12666011 crankshaft upper bearing is an essential component in the engine's rotating assembly. Replacing a worn-out or damaged crankshaft upper bearing is necessary for maintaining optimal engine performance and longevity. In this analysis, we will discuss the advantages and disadvantages of purchasing this part.

1. Improved Engine Performance: Replacing a worn-out crankshaft upper bearing with a new one can lead to enhanced engine performance. A new bearing reduces friction, allowing the crankshaft to rotate more smoothly and efficiently.

2. Prevents Engine Damage: A worn-out crankshaft upper bearing can cause significant engine damage, including connecting rod bearing failure, piston damage, and even total engine failure. Replacing the bearing proactively can save you from costly repairs or engine replacement.

3. Smoother Engine Operation: A new crankshaft upper bearing can lead to smoother engine operation, reducing vibrations and engine noise. This can result in a more comfortable ride and a less fatiguing driving experience.

4. Increased Engine Longevity: Replacing the crankshaft upper bearing can help extend the life of the engine. By preventing further damage to the engine components, you can avoid costly repairs and maintain the overall health of the engine.

1. Cost: The cost of purchasing a new GM 12666011 crankshaft upper bearing can be significant. Depending on the source of purchase and the specific engine application, the cost can range from $100 to over $500.

2. Labor Costs: If you do not have the necessary skills and tools to replace the crankshaft upper bearing yourself, you will need to pay for professional labor costs. The cost of labor can vary depending on the shop rate and the complexity of the engine.

3. Potential for Additional Damage: During the bearing removal and installation process, there is a risk of causing additional damage to the engine components. This can result in additional repair costs.

4. Time Consuming: Replacing a crankshaft upper bearing is a time-consuming process. It can take several hours to complete the job, depending on the level of experience and the complexity of the engine.

The decision to purchase a GM 12666011 crankshaft upper bearing involves weighing the potential benefits, including improved engine performance, engine protection, smoother engine operation, and increased engine longevity, against the costs and potential risks. While the purchase and installation of a new crankshaft upper bearing can be expensive and time-consuming, the advantages can outweigh the disadvantages in terms of engine health and overall performance.

If you suspect that your engine's crankshaft upper bearing is worn out or damaged, it is recommended that you replace it as soon as possible. You can purchase the GM 12666011 crankshaft upper bearing from a reputable auto parts supplier or through a professional mechanic. If you do not have the necessary skills and tools to replace the bearing yourself, consider having a professional perform the job to minimize the risk of additional damage.

Details:

Just Didn't Like it. Service: Replacement part used during engine rebuilds or bearing service. Also known as: Engine Crankshaft Main Bearing. Found a Better Price.

Changed My Mind. Function: Provides low-friction bearing surface between crankshaft and engine block to maintain proper oil film clearances. Quality intent: Produced to meet factory tolerances for fit and durability.

part #: 12666011 prices

• $27.75-$27.90

specifications engibearing:

• for years: 2020-2023
• brand: Gm Genuine Parts
• part type: Bearing Crankshaft
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• make: Buick
• year: 2020 2021 2022 2023
• parts included: Only Part Reference 34 On The Diagram Is Included
• manufacturer part number: 12666011

seller engibearing:

• rating: 98.5%
• city: Garland, Texas
• # reviews: 24792

general engibearing:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Engine Bearings

offer engibearing:

• options: Ship-to-home
• quantity: 4
• started: December 29, 2025
• availability: In Stock
• sold: 0

shipping engibearing:

• transit: 5-11 Days
• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• cost: $0.00
• type: Fixed

returns engibearing:

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

payments engibearing:

• wallet: Paypal
• other
• credit card: Diners-club

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