What is the purpose of a valve stem seal?

Valve stem seals are designed to prevent oil from leaking down the valve stem into the combustion chamber. This helps reduce oil consumption and blue smoke from the exhaust.

Why do these seals have a metal jacket?

The metal jacket helps the seal maintain its shape and provides a more robust seal against the valve guide. It adds durability and ensures the seal stays in place during engine operation.

How many seals are included in this pack?

This pack contains 16 valve stem seals. This quantity is typically sufficient for engines with 8 cylinders.

Specifications

Brand: Cometic Gasket
Part #: 3516P-16
UPC: 191070051037

Cometic 8.0mm x 0.492in x 0.470in x 0.616in Poly Valve Stem Seal - Metal Jacket - 16 Pack

Name: Cometic 8.0mm x 0.492in x 0.470in x 0.616in Poly Valve Stem Seal - Metal Jacket - 16 Pack
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-8-0mm-x-0-492in-x-0-470in-x-0-616in-poly-valve-stem-seal--t14-804265
Price: 37.35 USD
Availability: BackOrder

$37.35

On Backorder

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

Fits 1997-2004 Chevrolet Corvette. Cometic 8.0mm poly valve stem seals with metal jackets help prevent oil leaks.

Key Features

Fits 1997-2004 Chevrolet Corvette.
Features a metal jacket for improved durability and shape retention.
Poly material construction helps create a reliable seal.
Designed for 8.0mm valve stems and guides.
Measures 0.492in OD x 0.470in ID x 0.616in height.
Includes 16 seals, suitable for most V8 engines.

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About this part

Product Details

These Cometic valve stem seals feature a metal jacket around the poly material, which helps them hold their shape and seal effectively around the valve stem. This design is important for keeping oil from leaking down into the combustion chamber, which can cause blue smoke out the exhaust and increased oil consumption. The 8.0mm size is specific to certain engine applications, ensuring a proper fit on the valve guide.

Each seal measures 0.492 inches on the outside diameter where it seals against the valve guide, and 0.470 inches on the inside diameter where it fits over the valve stem. The overall height is 0.616 inches. This pack includes 16 seals, which is enough for most V8 engines. Using new valve stem seals is a common step when rebuilding an engine or addressing oil consumption issues.