What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic head gasket is .051 inches. This measurement is important for ensuring proper piston-to-valve clearance and compression ratio after installation.

Do I need to use any sealant with this gasket?

No, this Cometic Multi-Layer Steel (MLS) head gasket is designed to provide maximum sealing performance without the need for any additional sealants. The Viton coating on the outer layers ensures a reliable seal on its own.

What is Viton and why is it used on this gasket?

Viton is a type of synthetic rubber that is highly resistant to heat, chemicals, and harsh sealing environments. It's used on the outer layers of this gasket to create a durable and effective seal, especially in high-output engines where temperatures can be extreme.

Specifications

Brand: Cometic Gasket
Part #: C5741-051
UPC: 191070138417

Cometic Chevrolet 4.3L Gen-1 90 Degree V6 .051in MLS Cylinder Head Gasket - 4.155in Bore

Name: Cometic Chevrolet 4.3L Gen-1 90 Degree V6 .051in MLS Cylinder Head Gasket - 4.155in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevrolet-4-3l-gen-1-90-degree-v6-051in-mls-cylinder-head-t14-805308
Price: 111.49 USD
Availability: BackOrder

$111.49

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Cometic Chevrolet 4.3L Gen-1 cylinder head gasket. MLS construction with Viton coating for reliable sealing.

Key Features

Fits a wide range of Chevrolet and GMC vehicles with 4.3L Gen-1 90-degree V6 engines.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are embossed and coated with heat-resistant Viton rubber.
Compressed operating thickness is .051 inches.
Features a 4.155-inch bore size.
Suitable for aluminum heads with aluminum or cast iron blocks.

⚠️ 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

This is a Cometic Multi-Layer Steel (MLS) cylinder head gasket designed for Chevrolet 4.3L Gen-1 90-degree V6 engines. It features a 4.155-inch bore and a compressed thickness of .051 inches. This gasket is built to handle the demands of higher output engines and is suitable for applications using aluminum heads with either aluminum or cast iron blocks, as it can manage the shearing forces that arise between different metals.

The construction uses multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are embossed and coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit. This coating ensures a strong seal in harsh conditions and across various surface finishes. The center layer is uncoated stainless steel, allowing for precise thickness control to meet specific engine requirements. These MLS gaskets do not require any additional sealants for installation.

This gasket fits a wide range of Chevrolet and GMC vehicles, including models like the Chevrolet Astro, C1500, and S10 Blazer, as well as GMC C1500 and K2500 trucks. It's a well-built option for rebuilding or repairing the top end of these engines.