GENUINE GM PARTS 12664179 Engine Crankshaft

( Brand: Genuine Gm Parts ), ( Manufacturer Part Number: 12664179 ), ( Manufacturer Warranty: 1 Year ), ( Type: Engine Crankshaft )

Review GENUINE GM PARTS Canada Engine Crankshaft

The **GM 12664179 Engine Crankshaft** is a precision-engineered component designed for high-performance and durability in General Motors small-block V8 and LS-series engines, specifically tailored for applications requiring enhanced reliability and longevity. Crafted from high-grade forged steel, this crankshaft is built to withstand extreme stress, high RPM demands, and the intense thermal cycling inherent in modern high-output engines. Its design incorporates a balanced, counterweighted configuration to minimize vibration and ensure smooth operation, reducing wear on bearings, rods, and other critical engine components. The crankshaft features a robust main journal and rod journal design, often featuring larger-than-stock dimensions to accommodate increased horsepower and torque outputs without compromising structural integrity. The machining process includes precision grinding and balancing to meet or exceed OEM specifications, ensuring optimal performance and longevity. Whether used in stock applications for enhanced durability or in high-performance builds for increased power, this crankshaft delivers a seamless blend of strength, precision, and reliability, making it an ideal choice for enthusiasts and professional mechanics seeking a dependable upgrade. Its compatibility with a wide range of GM engines including the classic 350, 400, and modern LS-series variants ensures versatility across different applications, from daily drivers to race engines.

### **Pros and Cons of Buying a GM 12664179 Engine Crankshaft**

1. **Compatibility** The GM 12664179 crankshaft is designed specifically for certain GM engines, ensuring a precise fit with the engine block, bearings, and other components. This reduces the risk of mechanical issues caused by improper sizing or alignment.

2. **Performance Potential** If the crankshaft is a performance or aftermarket upgrade (e.g., forged, balanced, or modified for higher RPM), it can improve engine durability, power output, and longevity, especially in high-performance or modified applications.

3. **OEM Quality (If New)** When purchasing a new OEM (Original Equipment Manufacturer) crankshaft, you benefit from GM s engineering standards, which include precise machining, heat treatment, and balancing to ensure reliability.

4. **Warranty Coverage** Some suppliers offer warranties on new or remanufactured crankshafts, providing protection against defects in materials or workmanship.

5. **Cost-Effective Replacement** In some cases, a new or remanufactured crankshaft may be more affordable than a complete engine rebuild, making it a practical solution for engines with minor internal wear.

6. **Customization Options** For enthusiasts, aftermarket crankshafts may offer features like larger journals, counterweights, or special balancing for specific tuning goals.

7. **Long-Term Reliability** A high-quality crankshaft can significantly extend the life of an engine by reducing stress on critical components like bearings and rods.

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1. **High Cost** A new or remanufactured GM 12664179 crankshaft can be expensive, especially if sourced from a reputable supplier. Prices may vary widely depending on whether it s OEM, aftermarket, or rebuilt.

2. **Installation Complexity** Replacing a crankshaft requires specialized tools, expertise, and often a full engine teardown. Improper installation can lead to catastrophic engine failure, so labor costs and skill level must be considered.

3. **Compatibility Risks** If the crankshaft is not an exact match (e.g., a different engine model or aftermarket variant), it may not align properly with the engine block, leading to issues like bearing failure or rod knock.

4. **Remanufactured Quality Variability** Some remanufactured crankshafts may not meet OEM standards, especially if sourced from less reputable suppliers. Poor machining, improper heat treatment, or unbalanced shafts can cause premature wear or failure.

5. **Additional Costs** Beyond the crankshaft itself, you may need to replace related components such as bearings, seals, gaskets, or even the engine block if it s worn. These extra parts add to the overall expense.

6. **Time and Downtime** Engine rebuilds or crankshaft replacements require significant time, which can be inconvenient for owners who rely on their vehicle for daily use.

7. **Risk of Counterfeit Parts** The aftermarket is flooded with counterfeit or low-quality crankshafts, particularly from untrusted online sellers. These can fail quickly, void warranties, or even damage the engine.

8. **Limited Availability** Depending on the engine variant, finding a genuine or high-quality replacement crankshaft may be difficult, especially for older or discontinued models.

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The decision to purchase a GM 12664179 crankshaft depends on your specific needs, budget, and technical expertise. If you are dealing with a failed crankshaft in an older or high-mileage engine and need a reliable replacement, a **new OEM or high-quality remanufactured crankshaft** is the safest choice, provided it is sourced from a trusted supplier. For performance applications, an aftermarket crankshaft with proven durability may be justified, but thorough research and testing are essential.

However, if the engine has extensive internal damage (e.g., worn bearings, rod issues, or block cracks), a crankshaft replacement alone may not be sufficient, and a full engine rebuild or replacement might be more cost-effective in the long run.

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1. **Verify Compatibility** Confirm that the GM 12664179 crankshaft is an exact match for your engine model and year. Check with a trusted mechanic or GM service manual to avoid mismatches.

2. **Source from Reputable Suppliers** Purchase from authorized GM parts dealers, reputable aftermarket brands (e.g., Crane, Scat, or JE), or well-reviewed online retailers. Avoid suspiciously cheap or unbranded parts.

3. **Consider Remanufacturing** If the crankshaft is being remanufactured, choose a facility with a strong reputation for quality control, such as **Crane Crankshafts** or **Scat Crankshafts**, which offer warranties and precise machining.

4. **Budget for Full Rebuild Costs** Account for additional parts (bearings, seals, gaskets) and labor. If the engine has other issues, factor those into your decision.

5. **Professional Installation** Have the crankshaft replaced by a skilled machine shop or GM-certified technician to ensure proper alignment, balancing, and sealing.

6. **Alternative Options** If the engine is severely worn, consider whether a **crankshaft retrofit kit** (if available) or a **used but reliable engine swap** could be more economical than a full rebuild.

7. **Test Before Full Commitment** If possible, test the crankshaft in a known-good engine or consult with an expert to validate its performance before finalizing the purchase.

**Final Verdict:** For most owners, a **new or high-quality remanufactured GM 12664179 crankshaft from a trusted source** is the best choice if the engine is otherwise sound. However, weigh the costs, risks, and alternatives carefully to avoid unnecessary expenses or engine damage.

Details:

Found a Better Price. 12664179: Genuine GM Parts: GENUINE PARTS CANADA 12664179 Engine Crankshaft. Genuine New OEM Parts. This part fits vehicles made in the foll owing years 2019 ,2020,2021,2022.

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part #: 12664179 prices

• $1225.60-$1235.70

specifications cranshafengin:

• brand: Genuine Gm Parts
• mpn: 12664179
• manufacturer warranty: 1 Year
• type: Engine Crankshaft

seller cranshafengin:

• rating: 99.2%
• # reviews: 19119
• city: Garland, Texas

general cranshafengin:

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

offer cranshafengin:

• sold: 0
• quantity: 5
• started: May 16, 2026
• options: Ship-to-home
• availability: In Stock

payments cranshafengin:

• wallet: Apple-pay
• credit card: Visa
• other

shipping cranshafengin:

• cost: $0.00
• service: Standard
• class: Standard
• type: Fixed
• transit: 19-29 Days

returns cranshafengin:

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

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