What is the main job of a valve stem oil seal?

A valve stem oil seal's primary function is to prevent excess oil from leaking down the valve stem and into the combustion chamber. This helps maintain proper oil levels and reduces exhaust smoke.

Why is it important to replace worn valve stem oil seals?

Worn seals can lead to increased oil consumption, blue smoke from the exhaust (especially on startup), fouled spark plugs, and reduced engine performance. Replacing them is often part of an engine rebuild or top-end service.

What does the 'SEALS-3/8 STEM' in the product name mean?

This indicates that the seal is designed to fit valve stems with a 3/8 inch diameter. This is a common size for many engines, but it's important to verify your valve stem size before purchasing.

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Specifications

Brand: Manley Performance
Part #: 24046-8
UPC: 807298065526

Manley Valve Stem Oil Seal, SEALS-3/8 STEM

Name: Manley Valve Stem Oil Seal, SEALS-3/8 STEM
Brand: Manley Performance
SKU: manley-performance-manley-valve-stem-oil-seal-seals-3-8-stem-t14-881519
Price: 19.40 USD
Availability: BackOrder

$19.40

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 seal for 3/8" stems. Keeps oil from entering the combustion chamber.

Key Features

Fits 3/8 inch valve stems.
Helps prevent oil consumption.
Reduces exhaust smoke.
Manley Performance part number 24046-8.

⚠️ 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. This valve stem oil seal is a prime example, designed to keep oil where it belongs. When these seals wear out, oil can sneak past the valve guides and into your combustion chamber, leading to blue smoke out the exhaust, especially on startup, and increased oil consumption. Replacing them is a key step in rebuilding or refreshing an engine's top end.

This particular seal is made for 3/8 inch valve stems, a common size in many performance and stock applications. It's a well-built part that helps ensure your engine runs cleanly and efficiently. Proper installation of these seals is crucial for their function, preventing oil from leaking down the valve stem into the cylinder.