MOPAR 666771 Connecting Rod Bearing Undersized 863245 .012

( Type: Connecting Rod Bearing ), ( Ipn: 863245 ), ( Manufacturer Part Number: 666771 ), ( Vintage Part: Yes ), ( Universal Fitment: No ), ( Country Of Origin: United States )

Review MOPAR New Old Stock Connecting Rod Bearing .012 Undersized #666771 fits 1932–1942

Mopar 666771 Connecting Rod Bearing (012), Undersized for 1932-1942 Chrysler Engines

The Mopar 666771 Connecting Rod Bearing (012) is a crucial automotive component specifically engineered for Chrysler engines manufactured between the years 1932 and 1942. This undersized connecting rod bearing is designed to replace the original, worn-out bearing that has lost its sealing ability due to extended use.

This high-quality component is crafted using advanced materials to ensure superior performance and durability. The Mopar 666771 Connecting Rod Bearing (012) is made from a specialized material called micro-alloy steel, which is known for its exceptional strength and resistance to wear and tear. This material allows the bearing to withstand the heavy loads and high temperatures generated during engine operation.

One of the most significant advantages of the Mopar 666771 Connecting Rod Bearing (012) is its undersized design. This feature ensures a snug fit in the crankshaft, minimizing the potential for bearing movement and the resulting engine damage. By reducing the clearance between the crankshaft and the connecting rod, this bearing helps improve engine rigidity and overall performance.

The Mopar 666771 Connecting Rod Bearing (012) is also manufactured with a precise tolerance to ensure a perfect fit in your engine. This attention to detail is essential for maintaining proper engine clearances and preventing damage to other components.

Installation of the Mopar 666771 Connecting Rod Bearing (012) is a straightforward process. It is recommended that the engine be disassembled, and the old bearing be removed before installing the new one. Proper installation procedures should be followed to ensure the bearing's longevity and the optimal performance of your engine.

In summary, the Mopar 666771 Connecting Rod Bearing (012) is an essential upgrade for any Chrysler engine manufactured between 1932 and 1942. By providing a snug fit, reducing clearances, and using advanced materials, this undersized connecting rod bearing helps improve engine performance, durability, and overall reliability.

Mopar 666771 Connecting Rod Bearing (012) for 1932-1942 Chrysler Engines: A Detailed Analysis

The Mopar 666771 connecting rod bearing (012) is a popular aftermarket option for the 1932-1942 Chrysler engines. This bearing is known for its undersized design. In this analysis, we will discuss the potential pros and cons of using this bearing in your restoration or performance project.

1. Improved Clearance: The undersized Mopar 666771 connecting rod bearing allows for improved clearance between the rod and the crankshaft. This can help reduce the likelihood of contact between these components, which can lead to damage and potential engine failure.

2. Enhanced Performance: Some users report improved engine performance after installing this undersized bearing. This could be due to reduced friction and improved engine breathing, leading to more power and better fuel efficiency.

3. Wide Availability: The Mopar 666771 connecting rod bearing is widely available from various automotive parts retailers, both online and in-store.

1. Size Concerns: Using an undersized connecting rod bearing may lead to increased wear on other engine components, such as the crankshaft or piston rings. This could potentially lead to more frequent maintenance or replacement of these parts.

2. Potential Vibration: The reduced clearance provided by the undersized Mopar 666771 connecting rod bearing may result in increased vibration during engine operation. This could potentially lead to noise, reduced performance, or even damage to other engine components.

3. Potential Engine Damage: In some cases, using an undersized connecting rod bearing may cause damage to the engine. This could be due to increased stress on other engine components or potential contact between the rod and crankshaft.

The Mopar 666771 connecting rod bearing (012) can offer some benefits, such as improved clearance and potential performance gains. However, it also comes with potential drawbacks, including increased wear on other engine components and potential engine damage. Careful consideration should be given to the specific application and engine conditions before deciding to use this undersized bearing.

If you are considering using the Mopar 666771 connecting rod bearing (012) in your 1932-1942 Chrysler engine project, we recommend conducting a thorough inspection of your engine components and assessing the potential benefits and risks. Consider consulting with a qualified engine builder or mechanic to determine if this bearing is the best option for your specific application. Additionally, ensure that you follow proper installation procedures to minimize the potential for engine damage.

Details:

Plymouth: All model's 1932-1941. Part # 666771 Also 863245, 1238552. 012 inch undersized. Single bearing sold individually.

Part Type: New Old Stock. Connecting Rod Bearing .012 Undersized. Original Mopar part in original packaging. Make: Plymouth, Dodge, Deist, Chrysler.

Model: All model's.

part #: 666771 prices

• $7.99-$20.00

specifications engibearing:

• for makes: Mopar
• for years: 1932-1942
• type: Connecting Rod Bearing
• interchange part number: 863245
• manufacturer part number: 666771
• vintage part: Yes
• universal fitment: No
• country of origin: United States

payments engibearing:

• credit card: Mastercard
• wallet: Google-pay
• other

general engibearing:

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

offer engibearing:

• quantity: 1
• started: April 1, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home

seller engibearing:

• rating: 100.0%
• # reviews: 1489
• city: West Newbury, Massachusetts

returns engibearing:

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

shipping engibearing:

• carrier: USPS
• transit: 3-8 Days
• service: USPS Ground Advantage
• class: Standard
• cost: $5.00
• type: Fixed

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