What is the compressed thickness of this head gasket?

This Cometic head gasket has a compressed operating thickness of 0.089 inches. This specific thickness is crucial for maintaining the correct compression ratio in your GM L18 Vortec 8100 engine.

Do I need to use any sealant with this gasket?

No, Cometic Multi-Layer Steel (MLS) head gaskets are designed to provide maximum sealing performance on their own. They do not require any additional sealants for installation.

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

Viton is a heat-resistant rubber-based material that can withstand high temperatures, up to 482°F (250°C). It's used on the outer layers of this gasket to ensure a robust seal in demanding engine conditions and to meet various sealing environment requirements.

Specifications

Brand: Cometic Gasket
Part #: C5764-089
UPC: 191070222994

Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .089in MLS Cylinder Head Gasket - 4.280in Bore - LHS

Name: Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .089in MLS Cylinder Head Gasket - 4.280in Bore - LHS
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-l18-vortec-8100-gen-vii-big-block-v8-089in-mls-cylinde-t14-803621
Price: 163.97 USD
Availability: BackOrder

$163.97

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Cometic Gasket is known for multi-layer steel head gaskets. This .089in MLS head gasket for GM L18 Vortec 8100 has a 4.280in bore.

Key Features

Fits 2001-2007 Chevrolet and GMC trucks and SUVs with the GM L18 Vortec 8100 Gen-VII Big Block V8 engine.
Multi-layer steel (MLS) construction offers increased strength and corrosion resistance.
Features a 4.280 inch bore size and a compressed operating thickness of 0.089 inches.
Outer layers are coated with Viton, a heat-resistant rubber material rated up to 482°F (250°C).
Designed for maximum sealing performance in high-output engines.
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

Cometic Gasket is a well-known name for making robust engine sealing solutions, especially their multi-layer steel head gaskets. This particular gasket, part number C5764-089, is built for the GM L18 Vortec 8100 Gen-VII Big Block V8 engine. It features a bore size of 4.280 inches and a compressed thickness of .089 inches, designed to maintain proper compression ratios in these powerful engines.

This gasket is constructed from multiple layers of stainless steel, which gives it increased strength and the ability to rebound, helping it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C) and works well with both aluminum and cast iron blocks. This coating ensures a strong seal without needing additional sealants, making installation more straightforward. The center layer is uncoated stainless steel and can be varied to achieve different thicknesses, though this specific gasket is set at .089 inches.

This gasket fits a range of heavy-duty GM trucks and SUVs, including models like the Chevrolet Silverado 2500 HD and GMC Sierra 3500. It's a solid option for rebuilding or repairing the top end of your Vortec 8100 engine.