What does a valve stem oil seal do?

A valve stem oil seal's main job is to prevent engine oil from entering the combustion chamber through the valve guides. When these seals wear out, oil can leak down the valve stem and burn, causing blue smoke from the exhaust.

What size valve stem do these seals fit?

These Manley valve stem oil seals are specifically designed to fit valve stems that measure 5/16 of an inch in diameter.

Are these seals sold individually or as a set?

The product listing is for a single valve stem oil seal. You will need to purchase the correct quantity for all the valves on your engine, typically eight for a four-cylinder or eight for a V8.

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Specifications

Brand: Manley Performance
Part #: 24034-16
UPC: 807298065298

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-t14-881508
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 Valve Stem Oil Seal, SEALS-5/16 STEM. Keeps oil from entering the combustion chamber.

Key Features

Fits 5/16 inch valve stems.
Helps prevent oil consumption.
Reduces exhaust smoke.
Manley Performance part number 24034-16.

⚠️ 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

Manley Performance is well-known for making strong internal engine components. These valve stem oil seals are a prime example, designed to keep oil where it belongs. When your valve seals start to wear out, you'll often notice blue smoke puffing out of your exhaust, especially after the engine has been sitting for a bit or when you first accelerate. That smoke is oil getting past the seals and burning in your combustion chamber.

These particular seals are made for 5/16 inch valve stems, which is a common size for many performance and some stock applications. They are built to create a tight seal around the valve stem, preventing that unwanted oil consumption and keeping your exhaust cleaner. If you're rebuilding your engine or just tackling a valve seal job, using good quality seals like these from Manley will help ensure your engine runs smoothly and efficiently.