What is the compressed thickness of this head gasket?

This Cometic MLS head gasket has a compressed operating thickness of 0.098 inches. The center shim layer is stainless steel, and the outer layers are coated with Viton.

Do I need to use any sealant with this gasket?

No, Cometic MLS head gaskets are designed for maximum sealing performance and do not require any additional sealants. They are built to seal effectively on their own.

What types of engine blocks and heads is this gasket compatible with?

This gasket is ideal for use with both aluminum heads on aluminum blocks and aluminum heads on cast iron blocks. The Viton coating is designed to handle the shearing forces created by these material combinations.

Specifications

Brand: Cometic Gasket
Part #: C5764-070
UPC: 191070139629

Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .070in MLS Cylinder Head Gasket - 4.280in Bore - LHS

Name: Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .070in MLS Cylinder Head Gasket - 4.280in Bore - LHS
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-l18-vortec-8100-gen-vii-big-block-v8-070in-mls-cylinde-t14-803619
Price: 152.35 USD
Availability: BackOrder

$152.35

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Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .070in MLS Cylinder Head Gasket - 4.280in Bore - LHS. Built with multiple stainless steel layers and Viton coating for reliable sealing.

Key Features

Fits Chevrolet Avalanche 2500, Chevrolet Express 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, Chevrolet Suburban 2500, GMC Savana 3500, GMC Sierra 2500 HD, GMC Sierra 3500, and GMC Yukon XL 2500.
Multi-Layer Steel (MLS) construction provides increased strength and corrosion resistance.
Outer layers are coated with heat-resistant Viton rubber for reliable sealing.
Designed for a 4.280-inch bore size.
Compressed operating thickness is 0.098 inches.
No additional sealants are required for installation.

⚠️ 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 GM L18 Vortec 8100 Gen-VII Big Block V8 engines. It features a 4.280-inch bore and a compressed thickness of 0.098 inches, with a specific 0.070-inch compressed operating thickness. This gasket is built to handle the demands of high-output engines and fits a range of heavy-duty trucks and SUVs, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500.

Composed of multiple embossed stainless steel layers, this gasket offers increased strength and corrosion resistance. The outer layers are coated on both sides with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C) and works well with aluminum heads on either aluminum or cast iron blocks. The center layer is uncoated stainless steel, allowing for precise thickness control. These MLS gaskets are designed for maximum sealing performance and do not require additional sealants, making them a solid option for rebuilding or repairing your engine's top end.