Do I need to use sealant with this Cometic head gasket?

No, Cometic MLS head gaskets are designed to provide maximum sealing performance without the need for additional sealants. The Viton coating on the outer layers ensures a reliable seal on its own.

What is the compressed thickness of this gasket?

This .027 inch gasket has a compressed operating thickness of 0.036 inches. This thickness is achieved through the multi-layer steel design and the specific materials used.

Can this gasket be used with different block and head materials?

Yes, Cometic MLS gaskets are ideal for applications using aluminum heads with either aluminum or cast iron blocks. They are built to withstand the shearing forces created by dissimilar materials.

Specifications

Brand: Cometic Gasket
Part #: C5273-027
UPC: 191070123581

Cometic Chevy Gen-1 Small Block V8 .027in MLS Cylinder Head Gasket - 4.200in Bore

Name: Cometic Chevy Gen-1 Small Block V8 .027in MLS Cylinder Head Gasket - 4.200in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevy-gen-1-small-block-v8-027in-mls-cylinder-head-gasket-t14-806177
Price: 97.74 USD
Availability: BackOrder

$97.74

On Backorder

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Cometic Chevy Gen-1 Small Block V8 .027in MLS Cylinder Head Gasket - 4.200in Bore. Seals your engine for reliable performance.

Key Features

Fits a wide range of 1980-1986 Chevrolet and GMC trucks, cars, and vans.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated with heat-resistant Viton rubber for a reliable seal without additional sealants.
Designed for use with aluminum heads on aluminum or cast iron blocks.
Features a 4.200-inch bore, valve-pocketed bores, and steam holes.
Compressed operating thickness is 0.036 inches.

⚠️ 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

If you're rebuilding the top end of your Chevy Gen-1 Small Block V8, getting the right cylinder head gasket is crucial for a solid seal. This Multi-Layer Steel (MLS) gasket from Cometic is built to handle the demands of higher output engines, ensuring your combustion chambers stay sealed tight.

Cometic uses multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes, meaning you don't need extra sealants. The center layer is stainless steel, and its thickness is varied to achieve the specific compressed operating thickness of 0.036 inches with this .027 inch gasket. This construction is ideal for mating aluminum heads to either aluminum or cast iron blocks, as it can manage the different expansion rates between those materials.

This gasket is designed with a 4.200-inch bore and includes features like valve-pocketed bores and steam holes, making it a well-built option for many 1980-1986 GM vehicles, including popular models like the Chevrolet C10 and GMC C1500. Make sure to check the fitment data to confirm it's the right choice for your specific application.