LYCOMING LW-11153 Crankshaft Overhauled O-360-A4K 8130-3

( Brand: Lycoming ), ( Manufacturer Part Number: LW-11153 ), ( Part Type: Crankshaft )

Review LYCOMING Crankshaft Assy Overhauled Form Yellow Tag

The **Lycoming LW-11153 O-360-A4K crankshaft, overhauled to OEM specifications with an 8130-3 main bearing journal treatment**, represents a precision-engineered component designed for the highest standards of reliability and performance in Lycoming s legendary O-360 aircraft engine family. This crankshaft is meticulously crafted from high-grade forged steel, ensuring exceptional strength and durability under the demanding stresses of continuous flight operations. The overhaul process adheres strictly to Lycoming s original engineering blueprints, with each journal and bearing surface meticulously machined to tight tolerances typically within 0.0005 inches to guarantee a perfect fit within the engine block and connecting rod bearings. The **8130-3 treatment** applied to the main bearing journals involves a specialized heat-treating and case-hardening process, which enhances the surface hardness to resist wear, scoring, and fatigue while maintaining the underlying ductility of the steel. This dual-phase metallurgical refinement is critical for extending the crankshaft s operational life, particularly in high-RPM or high-power applications where excessive heat and mechanical load can compromise weaker materials. The crankshaft s counterweights are dynamically balanced to factory specifications, eliminating any residual vibration that could lead to premature wear in the engine s accessory drive or crankshaft seals. Additionally, the fillets and transitions between journals and counterweights are polished to a mirror-like finish, reducing stress concentrations and further mitigating the risk of fatigue failure. Whether installed in a restored classic aircraft or a modernized engine, this overhauled crankshaft delivers the same dependable performance as a new OEM part, making it an ideal choice for pilots and mechanics seeking uncompromising quality and longevity in their Lycoming O-360 powerplant.

### Pros and Cons of Buying a Lycoming LW-11153 O-360-A4K Crankshaft (Overhauled, 8130-3)

#### **Pros**

1. **Reliability and Proven Performance** The Lycoming O-360 series is a well-established engine design with decades of use in aviation, agriculture, and marine applications. The A4K variant is a later model with refinements that improve durability and efficiency compared to earlier iterations.

2. **Overhauled Crankshaft (8130-3)** The crankshaft has been professionally overhauled, which means it has undergone machining, balancing, and inspection to meet or exceed OEM specifications. This reduces the risk of catastrophic failure due to wear or imbalance.

3. **Compatibility with Stock and Modified Engines** The LW-11153 is a direct replacement for the original O-360-A4K crankshaft, ensuring seamless integration with the engine block, rods, and other components. It is also compatible with aftermarket upgrades like forged pistons, stronger rods, or turbocharging (if properly supported).

4. **Cost-Effective Upgrade** Replacing a worn or damaged crankshaft is often more economical than buying a complete overhauled engine. An overhauled crankshaft is significantly cheaper than a full engine rebuild or replacement.

5. **Extended Engine Life** A fresh crankshaft can help prolong the life of the engine by preventing premature wear on bearings, rods, and other internal components. This is particularly valuable for high-hour engines or those used in demanding applications.

6. **Support from Lycoming and Aftermarket Suppliers** Lycoming provides technical support and parts for their engines, and many aftermarket suppliers specialize in O-360 components. This ensures availability of gaskets, seals, bearings, and other necessary parts.

7. **Potential for Increased Power (with Supporting Mods)** While the crankshaft itself does not increase power, pairing it with a stronger rod set, upgraded pistons, and a supporting turbocharger (if applicable) can lead to improved performance without compromising reliability.

8. **Easier Maintenance Access** The O-360 is a relatively simple engine design, making crankshaft replacement a manageable DIY project for experienced mechanics. However, proper tools and expertise are still required.

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#### **Cons**

1. **Limited Power Potential Without Supporting Mods** The stock crankshaft is not designed for extreme power levels (e.g., 100 HP overstock). Pushing it beyond its intended limits without reinforcing the rod set, main bearings, and other components can lead to premature failure.

2. **Wear on Mating Components** If the engine has high mileage or was previously abused, the crankshaft replacement alone may not address wear in the main bearing journals, rod bearings, or camshaft. A full engine inspection is recommended before installation.

3. **Cost of Supporting Parts** While the crankshaft itself is affordable, replacing bearings, seals, gaskets, and other related components can add up. A full engine rebuild may still be more cost-effective if other major parts are worn.

4. **Skill and Experience Required** Installing a crankshaft requires precision machining, balancing, and proper torque specifications. Improper installation can lead to vibration, bearing failure, or rod bearing issues. If the mechanic lacks experience, it may be better to use a Lycoming-certified shop.

5. **Potential for Counterfeit or Poor-Quality Parts** The aftermarket for Lycoming parts can be hit-or-miss. Some suppliers sell re-machined or re-cast crankshafts that may not meet OEM standards. Buying from reputable suppliers (e.g., Lycoming, Summit Racing, or trusted rebuilders) is critical.

6. **Time-Consuming Process** Replacing a crankshaft is a labor-intensive job that requires disassembly, cleaning, inspection, and reassembly. This can take several days, especially for someone without prior experience.

7. **No Guarantee Against Future Issues** Even with an overhauled crankshaft, other components (e.g., camshaft, valves, ignition system) may still be worn or failing. A crankshaft replacement does not address all potential failure points in the engine.

8. **Limited Warranty Coverage** Aftermarket crankshafts typically come with limited warranties (e.g., 90 days to 1 year), whereas a Lycoming-certified rebuild may include a longer warranty. If the crankshaft fails prematurely, repair costs may not be covered.

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### **Ending Conclusion**

An overhauled Lycoming LW-11153 O-360-A4K crankshaft (8130-3) is a **wise investment for engines that need a reliability boost** but are not being pushed to extreme power levels. It is particularly beneficial for:

- High-hour engines showing signs of crankshaft wear (e.g., oil consumption, vibration, or bearing failure).

- Engines that have been previously damaged or neglected.

- Owners who want to extend the life of their engine without a full rebuild.

However, it is **not a standalone power upgrade** it must be paired with a properly maintained engine and, if desired, supporting modifications (e.g., stronger rods, bearings, or turbocharging). The decision to replace the crankshaft should be based on a **full engine inspection**, as other components may require attention as well.

---

### **Recommendation**

1. **If your engine is running but showing signs of crankshaft wear (e.g., oil leaks, unusual noise, or vibration),** replacing the crankshaft is a **cost-effective way to restore reliability** and prevent catastrophic failure. Ensure the engine is otherwise in good condition (check bearings, rods, and camshaft).

2. **If your engine is being used for high-performance applications (e.g., turbocharging, forced induction, or aggressive power settings),** consider reinforcing the entire drivetrain (e.g., upgraded rods, main bearings, and connecting rods) to support the increased stress. A stock crankshaft may not be sufficient for extreme power levels.

3. **Always source the crankshaft from a reputable supplier** (e.g., Lycoming, Summit Racing, or a trusted rebuild shop) to ensure it meets OEM specifications and has been properly overhauled and balanced.

4. **If the engine has high mileage or unknown history,** consider a **full inspection or rebuild** rather than just crankshaft replacement, as other components may be worn beyond safe limits.

5. **For DIY installation,** ensure you have the proper tools, experience, and patience. If unsure, consult a **Lycoming-certified mechanic** to avoid costly mistakes.

**Final Verdict:** A Lycoming LW-11153 overhauled crankshaft is a **solid upgrade for reliability**, but it should be part of a broader engine maintenance or rebuild strategy rather than a standalone power solution.

Details:

Lycoming Crankshaft Assembly O-360-A4K Overhauled Form 8130-3 Yellow Tag Main and Rods M003.

part #: lw11153 prices

• $452.00-$8000.00

specifications engineaviatio:

• brand: Lycoming
• mpn: Lw-11153
• part type: Crankshaft

offer engineaviatio:

• started: May 29, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock

seller engineaviatio:

• # reviews: 8223
• rating: 100.0%
• city: Cincinnati, Ohio

payments engineaviatio:

• credit card: Mastercard
• other
• wallet: Paypal

shipping engineaviatio:

• cost: $110.73
• carrier: UPS
• type: Calculated
• class: Standard
• service: UPS Ground
• transit: 4-7 Days

general engineaviatio:

• Aviation Parts Accessories > Engines > Engine Components
• condition: Remanufactured

returns engineaviatio:

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

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