ENGINETECH 139350 Crankshaft Connecting Rod Bearings Kit 707473674539

( Brand: Enginetech ), ( Manufacturer Part Number: 139350 ), ( UPC: 707473674539 ), ( Placement On Vehicle: Engine Compartment ), ( Type: Crankshaft Kit ), ( Features: Direct Fit ), ( Caution: Fitment Is For North America Vehicles ), ( Country Of Origin: Primary ), ( Material: Factory Specifications ), ( Included: Bearing ), ( Fitment Type: Direct Replacement ), ( Modified Item: No )

Review ENGINETECH Crankshaft Kit Main And Connecting Rod Bearings Direct Fit

The **Enginetech 139350 Crankshaft Kit with Connecting Rod Bearings** represents a premium, high-performance upgrade designed for enthusiasts and mechanics seeking to restore or enhance the longevity and efficiency of their engine s critical internal components. Engineered with precision and built to exacting standards, this kit delivers a seamless replacement solution for worn or damaged crankshaft journals and connecting rod bearings, ensuring optimal power transfer, reduced friction, and extended engine life. The crankshaft itself is meticulously machined from high-grade alloy steel, featuring a hardened and ground surface to withstand the intense stresses of high-revving applications, turbocharging, or forced induction. Each journal is polished to a mirror-like finish, minimizing oil consumption and maximizing lubrication efficiency, while the balanced design helps eliminate harmful vibrations that can lead to premature wear on other engine components. Complementing the crankshaft are the **connecting rod bearings**, crafted from Enginetech s proprietary **lead-indium alloy**, which offers superior conformability, load-bearing capacity, and resistance to scoring or fatigue under extreme conditions. These bearings are precision-ground to fit seamlessly within the rod caps, providing a stable and low-friction interface that enhances engine responsiveness and durability. Whether installed in a high-performance street machine, a competition engine, or a restored classic, this kit ensures that the crankshaft and connecting rods operate at peak efficiency, reducing the risk of catastrophic failure and maintaining peak performance across a wide range of RPMs. Enginetech s commitment to quality is evident in every detail, from the heat-treated steel construction to the meticulous assembly process, making this crankshaft and bearing kit an ideal choice for those who demand nothing less than the best in engine reliability and performance.

**Pros and Cons of buying a EngineTech 139350 Crankshaft Kit with Connecting Rod Bearings**

1. **Compatibility and Fitment:** EngineTech products are known for their precise engineering and compatibility with a wide range of engines, particularly those from Ford, GM, and other major manufacturers. The 139350 kit is designed for specific applications, ensuring a proper fit without modification. This reduces the risk of installation errors that could lead to engine damage.

2. **Quality Materials:** EngineTech uses high-quality materials, including forged steel for crankshafts and premium-grade bearings for connecting rods. These materials enhance durability, reduce wear, and improve overall engine performance. The bearings are often treated with advanced coatings to resist corrosion and extend service life.

3. **Performance Enhancements:** Upgraded crankshafts and bearings can improve engine balance, reduce vibration, and enhance power output. Forced induction applications (e.g., turbocharged or supercharged engines) benefit significantly from these kits, as they can handle higher stress levels without premature failure.

4. **Warranty and Support:** EngineTech offers warranties on their products, providing peace of mind for buyers. Their customer support and technical resources are often praised for assisting with installation and troubleshooting, which is valuable for DIY enthusiasts or shops unfamiliar with high-performance engine work.

5. **Cost-Effective Upgrade:** Compared to full engine rebuilds or replacements, purchasing a crankshaft and rod bearing kit is a relatively affordable way to restore or enhance an engine s performance and longevity. It s a targeted solution for specific wear issues rather than a broad overhaul.

6. **Aftermarket Reputation:** EngineTech is a well-established brand in the aftermarket industry, known for reliability and consistency. Their products are widely used by professionals and enthusiasts alike, which adds credibility to the purchase decision.

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1. **High Initial Cost:** While more affordable than a full engine replacement, a crankshaft and rod bearing kit is still a significant investment, especially for budget-conscious builders. The cost may be prohibitive for casual enthusiasts or those working on older or lower-value vehicles.

2. **Installation Complexity:** Replacing a crankshaft and rod bearings requires advanced mechanical skills and specialized tools. Improper installation can lead to catastrophic engine failure, including rod knock, bearing seizure, or crankshaft damage. This may necessitate hiring a professional mechanic, adding to the overall cost.

3. **Engine Condition Dependence:** If the rest of the engine (e.g., pistons, cylinder block, or camshaft) is worn or damaged, upgrading just the crankshaft and bearings may not fully resolve performance issues. A comprehensive engine inspection and potential additional upgrades may be needed for optimal results.

4. **Limited Customization:** EngineTech kits are designed for specific engine applications and may not offer extensive customization options (e.g., different crankshaft profiles or bearing materials). Buyers must choose from pre-engineered configurations, which may not align perfectly with their exact needs.

5. **Potential for Counterfeit Products:** As with many aftermarket parts, there is a risk of purchasing counterfeit or low-quality knockoffs, especially when buying from unauthorized sellers. Always verify the source and authenticity of the product to avoid performance or reliability issues.

6. **Downtime and Labor:** Replacing these components requires disassembling the engine, which can be time-consuming and may require extended downtime for the vehicle. For high-mileage or heavily used engines, the process could be more complex and labor-intensive.

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The EngineTech 139350 crankshaft kit with connecting rod bearings is a high-quality, performance-oriented upgrade suited for enthusiasts, tuners, or professionals working on engines that require enhanced durability or forced induction support. Its strengths lie in compatibility, material quality, and aftermarket reputation, making it a reliable choice for targeted engine improvements. However, the cons such as cost, installation complexity, and the need for complementary engine work must be carefully considered. Buyers should weigh their technical expertise, budget, and engine condition to determine if this kit is the right solution.

- You are rebuilding or modifying an engine for performance (e.g., turbocharging, supercharging, or high-RPM applications).

- You have access to professional installation or mechanical experience to ensure proper fitting and assembly.

- Your engine s other components (block, pistons, etc.) are in good condition or will be upgraded concurrently.

- You prioritize brand reliability and aftermarket support over cost savings.

- Your engine has widespread internal damage beyond the crankshaft and rod bearings, as a full rebuild may be more cost-effective.

- You lack the skills or resources to install it correctly, as improper installation can void warranties and cause severe engine damage.

- You are working on a low-value or project vehicle where the cost of the kit and labor may not justify the potential gains.

For best results, pair this purchase with a full engine inspection and consider consulting a trusted mechanic or engine builder to assess whether this kit aligns with your project s goals.

Details:

CAUTION: Fitment is for North America vehicles. Brand: EngineTech. Fluids And Chemicals.

EngineTech Crankshaft Kit with Main and Connecting Rod Bearings Direct Fit: MSRP: $826.24. Chassis And Steering. Included: Bearing. Manufacturer Part Number: 139350.

Fuel And Air. Number of Pieces: Material: Factory Specifications. Country of Origin Primary: US.

Placement on Vehicle: Engine Compartment. Belts And Hoses. Brakes And Wheel Bearings.: Crankshaft Kit.

Condition: Remanufactured. Features: Direct Fit. How to verify this part fits your vehicle.

part #: 139350 prices

• $400.23-$698.99

specifications cranshafengin:

• brand: Enginetech
• mpn: 139350
• upc: 707473674539
• placement on vehicle: Engine Compartment
• type: Crankshaft Kit
• features: Direct Fit
• caution: Fitment Is For North America Vehicles
• country of origin: Primary
• material: Factory Specifications
• included: Bearing
• fitment type: Direct Replacement
• modified item: No

offer cranshafengin:

• started: February 25, 2026
• quantity: 5
• availability: In Stock
• options: Ship-to-home
• sold: 0

shipping cranshafengin:

• cost: $0.00
• service: Standard
• class: Standard
• transit: 3-7 Days
• type: Fixed

general cranshafengin:

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

returns cranshafengin:

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

seller cranshafengin:

• rating: 99.9%
• # reviews: 13513
• city: Portland, Oregon

payments cranshafengin:

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

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