Lycoming

Rocker Arm Assembly 17F19357

P/N 17F19357

NE — New Condition disclosed

Condition NE — Condition disclosed — is shown up front on this listing, along with the exact price, current availability, and what certification paperwork ships with the part, so you can confirm fit and airworthiness before you buy. Full specifications and answers to common questions are below.

Sold by AAP

What does “New” condition mean?

$315.74

In stock

UOM EA · MOQ 1

Price check pending — request a quote and we will confirm price and stock.

Paperwork shown up front · 30-day returns · secure checkout

Request certification documents (8130-3 / EASA Form 1 / C of C)

Description

Overview

The **Valve Stem Seal (Lycoming P/N 17F19357)** is a critical engine component engineered to regulate the amount of lubricating oil that enters the valve guide from the rocker arm area. Installed directly on the valve stem, typically at the top of the valve guide, this seal plays a vital role in preventing excessive oil consumption and reducing exhaust emissions by controlling oil flow into the combustion chamber. It is an integral part of the valve train system within Lycoming O-320 series engines, ensuring optimal lubrication of the valve stem while preventing oil from being drawn into the cylinder during intake strokes or pushed out during exhaust strokes.

Specifications

Part Number: 17F19357
Manufacturer: Lycoming Engines
Type: Valve Stem Seal
Weight: 0.27 lb (approximately)
Dimensions:
- Length: 3.25 inches
- Width: 1.15 inches
- Height: 0.85 inches
Material: Typically a high-temperature resistant synthetic rubber or elastomer compound, often Viton or similar fluorocarbon material, designed for resilience against engine oils and operating temperatures.
Color/Finish: Commonly black or brown, consistent with elastomer materials.
Function: Prevents excessive oil passage down the valve guide into the combustion chamber.

Aircraft Compatibility

This Lycoming Valve Stem Seal, P/N 17F19357, is specifically designed for installation in various models of the Lycoming O-320 series aircraft engines. Its primary application includes:

Lycoming O-320-D3G engines
Other Lycoming O-320 series engines, including but not limited to:
- O-320-A series

Specifications

Part number	17F19357
Manufacturer	Lycoming
Condition	NE
Airworthiness	Condition disclosed
Country of origin	—
Lead time	days

Frequently asked

Does the Rocker Arm Assembly 17F19357 include certification paperwork?

This item is supplied as "Condition disclosed" rather than with full 8130-3 traceability — normal for some condition codes, and it does not mean the part is unusable, only that the paperwork profile differs. Check the listing for exactly what documentation is included, and request any available records before you purchase if your installation requires them.

What condition is this part?

This part is listed in condition NE — Condition disclosed. Condition codes describe how a part reached its current state (for example new, overhauled, serviceable, repaired, or as-removed) and directly affect what paperwork ships with it and how it should be installed. See the Glossary for the full definition of every condition code we use.

How fast does it ship?

This item is in stock and ships promptly, usually the same or next business day once your order and payment are confirmed. Exact transit time depends on your shipping method and destination and is shown at checkout. If your aircraft is grounded, AOG expedited handling is available on request — no phone tree required.

Can I return it?

You may return this item within 30 days of delivery if it is unopened, uninstalled, and in its original packaging. Items that have been installed, powered on, opened hazmat, or separated from an attached 8130-3 tag are non-returnable because their airworthiness status can no longer be confirmed once removed from the part. See our Returns policy for the full process.