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

No, Cometic MLS head gaskets are designed to provide maximum sealing performance on their own. The embossed stainless steel layers with Viton coating create a reliable seal without the need for additional sealants.

What is the purpose of the steam holes in this gasket?

The steam holes are included to help manage heat and pressure within the combustion chamber. They allow steam to escape, which can help prevent overheating and maintain consistent engine temperatures.

Can this gasket be used with different block materials?

Yes, these MLS gaskets are suitable for use with both aluminum heads on aluminum blocks and aluminum heads on cast iron blocks. They are designed to withstand the shearing forces and different expansion rates between these materials.

Specifications

Brand: Cometic Gasket
Part #: C5249-045
UPC: 191070016340

Cometic Chevy Small Block 4.200 inch Bore .045 inch MLS Head Gasket (w/All Steam Holes)

Name: Cometic Chevy Small Block 4.200 inch Bore .045 inch MLS Head Gasket (w/All Steam Holes)
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevy-small-block-4-200-inch-bore-045-inch-mls-head-gaske-t14-279109
Price: 102.25 USD
Availability: BackOrder

$102.25

On Backorder

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

Cometic Chevy Small Block V8 MLS head gasket. 4.200" bore, .045" compressed thickness. Fits many 1980-1986 vehicles.

Key Features

Fits 1980-1986 Chevrolet Gen-1 Small Block V8 engines, including models like the Chevrolet C10, Camaro, and GMC C1500.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Features a 4.200 inch bore and a compressed operating thickness of 0.045 inches.
Outer layers are coated with Viton, a heat-resistant elastomer rated up to 482°F (250°C).
Includes all steam holes for improved heat management in the combustion chamber.
Designed for maximum sealing performance without the need for additional sealants.

⚠️ 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 working on a Chevrolet Gen-1 Small Block V8 engine, this Cometic Multi-Layer Steel (MLS) head gasket is a solid option for sealing your cylinders. It's designed for a 4.200-inch bore and has a compressed thickness of 0.045 inches, with all steam holes included to help manage heat in the combustion chamber. This gasket fits a wide range of vehicles from 1980 to 1986, including popular models like the Chevrolet C10 and Camaro, as well as the GMC C1500.

Cometic builds these gaskets with multiple layers of stainless steel, which gives them strength and helps them resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle high temperatures up to 482°F (250°C). This construction means the gasket seals well without needing any extra sealants, making installation more straightforward. They're suitable for use with both aluminum and cast iron blocks, and can handle the different expansion rates between these materials.