What is the primary function of a valve stem oil seal?

A valve stem oil seal's main job is to control the amount of oil that lubricates the valve stem and guide. It prevents excess oil from leaking down into the combustion chamber, which can cause smoking and carbon buildup.

What material are these Manley valve stem seals made from?

These seals are made from a fluoroelastomer material. This type of rubber is known for its excellent resistance to heat and engine oils, making it suitable for the demanding environment inside an engine.

Are these seals a direct fit for all engines with 5/16 inch valve stems?

While these seals are designed to fit 5/16 inch valve stems, it's always best to confirm compatibility with your specific engine model. Checking the manufacturer's fitment guide or your vehicle's service manual is recommended before purchase.

Specifications

Brand: Manley Performance
Part #: 24029-16
UPC: 807298065274

Manley Valve Stem Oil Seal, SEALS-5/16 STEM

Name: Manley Valve Stem Oil Seal, SEALS-5/16 STEM
Brand: Manley Performance
SKU: manley-performance-manley-valve-stem-oil-seal-seals-5-16-stem-t14-881507
Price: 37.59 USD
Availability: BackOrder

$37.59

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley Performance valve stem oil seals. Part# 24029-16. Direct fit.

Key Features

Fits 5/16 inch valve stems.
Constructed from durable fluoroelastomer material.
Designed to prevent excess oil from entering the combustion chamber.
Helps reduce oil consumption and smoke.
Resists degradation from engine oils and high temperatures.
A popular choice for engine rebuilds and top-end work.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

These Manley valve stem seals are made from a durable fluoroelastomer material, chosen for its ability to withstand high temperatures and resist degradation from engine oils. They are designed to fit a 5/16 inch valve stem, a common size in many performance and stock engine builds. Properly sealing the valve guides is crucial for preventing excess oil from entering the combustion chamber, which helps reduce smoke, oil consumption, and carbon buildup on valves and pistons.

When you're rebuilding an engine or performing a top-end overhaul, ensuring each component works together is key. These seals are well-built to maintain their sealing integrity under the demanding conditions found inside an engine. They are a popular choice for mechanics who want reliable parts that fit right without needing special modifications.

If you're working on an engine that's seeing a lot of miles or higher performance demands, replacing old, worn-out seals with new ones like these Manley units can make a noticeable difference in how your engine runs and breathes. Always refer to your vehicle's service manual for the correct installation procedure and any specific tools required.