Overview
The Lycoming Connecting Rod Assembly, Part Number LW-11166, is a fundamental internal component of Lycoming O-320, IO-320, and LIO-320 series aircraft engines. This precisely engineered part serves as the crucial link between the engine's pistons and the crankshaft, translating the reciprocating motion of the pistons, driven by combustion, into the rotational motion required to turn the propeller. Each engine cylinder utilizes one connecting rod, forming part of the rotating and reciprocating mass that defines engine operation and power output.
Specifications
- Part Number: LW-11166
- Type: Connecting Rod Assembly (for Lycoming O-320 series engines)
- Material: High-strength forged steel alloy, typically SAE 4340 or equivalent, heat-treated for optimal strength and fatigue resistance.
- Construction: I-beam cross-section design for superior strength-to-weight ratio.
- Finish: Precision machined and ground surfaces, often shot-peened to enhance resistance to fatigue cracking. Bearing surfaces are honed to exact tolerances.
- Bearing Type: Designed for use with precision insert-type bearings at
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: LW-11166
- Part#: LW-11166
Aircraft Fitment Finder
Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
