Valve Stem Seals for LS, Coyote, Hemi, K20, 2JZ, RB, EJ Engines

What Valve Seals Do

Control oil at the valve stem

Valve stem seals meter oil between the valve stem and guide. Worn seals can contribute to oil consumption, smoke after deceleration, fouled plugs, and carbon buildup.

Viton and Positive Valve Seals

Material must suit the application

Viton positive seals are popular for high-temperature and performance engine rebuilds. Select the material, installed height, and retainer clearance recommended for the cylinder head and valve train.

Intake and Exhaust Seal Differences

Do not mix application details

Some engines use different intake and exhaust seal sizes or designs. Keep parts organized during head service and verify the engine-specific count for the valve configuration.

Cylinder Head Rebuild Planning

Inspect related wear points

Valve seals are usually replaced with valve springs, retainers, guides, and valves during a head rebuild. Measure guide clearance and inspect valve stem condition before assuming seals alone solve an oil-control issue.

Platform-Specific Sets

Buy for the actual cylinder head

The collection includes seals for Hemi, Coyote, Duratec, Mitsubishi 4B11, Nissan VR30, Subaru FA and EJ, Toyota G16E, BMW, B58, and other performance engine families.

Top Valve Seals Brands

• COMP Cams. Valve train parts and Viton valve seal sets for domestic engines.
• Supertech. Performance valves, retainers, and stem seals for import platforms.
• GSC Power-Division. Valve train components for Subaru, Mitsubishi, Ford, and Nissan builds.
• Ferrea. Race-proven valves and valvetrain parts for high-output engines.
• Manley. Engine components for domestic and import performance builds.
• Brian Crower. Cams, springs, retainers, and valve train hardware.
• Skunk2. Honda and Acura cylinder head performance parts.
• Edelbrock. Domestic engine valve train and cylinder head components.
• Trick Flow. Ford and GM cylinder head and valvetrain upgrades.
• Melling. OE-style engine rebuilding components and service parts.
• Mahle. Engine components and sealing solutions for rebuilt engines.
• Cometic Gasket. Performance gaskets for high-cylinder-pressure combinations.
• Victor Reinz. Engine sealing products for repair and rebuild work.
• Fel-Pro. Engine gasket and sealing products.
• Wiseco. Forged engine components for performance rebuilds.

How to Choose the Correct Valve Seal Set

• Confirm the engine family, cylinder head casting, and valve count.
• Measure valve stem diameter and guide outside diameter.
• Match seal material to engine temperature and intended use.
• Verify retainer and spring clearance at full valve lift.
• Confirm whether intake and exhaust seals are different.
• Replace seals as a complete engine-specific set when possible.
• Inspect valve guides for wear before installing new seals.
• Use the correct installer tool to avoid damaging the seal lip.
• Keep the work area clean during cylinder head assembly.
• Follow the engine builder torque and assembly lubricant guidance.

Common Questions

How do I confirm fitment before ordering?

Use the year, make, model, trim, engine, and drivetrain filters on the product page. Review the application notes before ordering, especially on modified vehicles.

Do I need other parts for installation?

Some installs need hardware, wiring, gaskets, or supporting components. Read the product details and installation instructions before beginning the job.

Are these parts intended for daily driven vehicles?

Many parts are built for street vehicles, but the right choice depends on the vehicle, tuning level, and local regulations. Check each product page for use notes.

Can I install this at home?

Valve seal service can be completed with the cylinder head installed on some engines, but it requires the correct spring compressor and a method to hold the valve closed. A qualified shop is recommended if guide wear or head removal is suspected.

What information should I have ready for support?

Have your vehicle year, make, model, trim, engine, drivetrain, and the product part number ready. Those details help confirm the correct application.

Do products include a manufacturer warranty?

Manufacturer warranty coverage varies by product and brand. Review the warranty details on the product page and retain your proof of purchase.

How quickly do orders ship?

Most in-stock orders ship promptly from a US warehouse. Delivery time depends on the part, warehouse location, and shipping destination.

Can I return an unused part?

Unused parts in original packaging may be eligible for return under the store return policy. Special-order, installed, and modified items can have different eligibility.

Will a modified vehicle need additional setup?

Modified engines, lifted trucks, forced induction builds, and custom exhaust systems can require supporting changes. Confirm compatibility with your build plan before ordering.

Can Black Ops Auto Works help select the right part?

Yes. Contact the team with your vehicle details and build goals for help narrowing the compatible options in this collection.

Why Buy Valve Seals from Black Ops Auto Works

Black Ops Auto Works stocks 89 Valve Seals SKUs with real fitment data, competitive pricing, and support from staff who build these vehicles themselves. Products are filterable by year, make, model, trim, engine, and drivetrain to confirm the correct application before ordering.

For focused shopping, browse our Valve Springs & Retainers, Head Components, Valves & Components, Engine Gaskets, Cometic Gasket, Victor Reinz.