What is Viton material and why is it used for valve seals?

Viton is a type of fluoroelastomer known for its excellent resistance to high temperatures and aggressive fluids like engine oil. This makes it ideal for valve stem seals, which are exposed to both heat from the engine and constant contact with oil.

What happens if my valve stem seals are worn out?

Worn valve stem seals can allow oil to seep past the valve guides into the combustion chamber. This often results in blue smoke from the exhaust, especially after the engine has been idling, and can lead to increased oil consumption and fouled spark plugs.

Do these seals come with any installation hardware?

This part includes the valve stem oil seals only. Installation typically requires specialized tools to compress the valve springs and remove/install the seals without damaging the valve guides or seals.

Specifications

Brand: Manley Performance
Part #: 24040-8
UPC: 807298065397

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-t14-881513
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 Valve Stem Oil Seal for 5/16 inch stems. Keeps oil out of the combustion chamber.

Key Features

Fits valve stems measuring 5/16 inch.
Constructed from durable Viton material for heat and oil resistance.
Helps prevent oil from entering the combustion chamber.
Reduces oil consumption and exhaust smoke.
Designed for reliable performance in engine applications.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

These Manley valve stem seals are made from a durable Viton material, known for its resistance to heat and oil. They're designed to fit valve stems measuring 5/16 of an inch, which is a common size in many performance and stock engines. Properly sealing the valve guides is crucial for preventing excess oil from getting into your combustion chamber, which can cause blue smoke out the exhaust and fouled spark plugs.

When you're rebuilding an engine or just replacing worn valve seals, using a well-made part like these from Manley ensures a good seal. Viton is a popular choice for valve seals because it holds up well under the high temperatures found around the exhaust valves. This helps maintain consistent engine performance and reduces oil consumption over time.