What is the compressed thickness of this head gasket?

The compressed operating thickness for this Cometic MLS head gasket is 0.040 inches. This measurement is important for ensuring proper compression ratios and valve-to-piston clearance.

What is the benefit of the Viton coating on the outer layers?

The Viton coating on the outer layers of the gasket is a heat-resistant rubber material that can withstand high temperatures up to 482°F (250°C). This helps create a reliable seal in demanding engine conditions.

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

No, Cometic MLS head gaskets are designed to provide maximum sealing performance on their own and do not require any additional sealants. The multi-layer steel construction and Viton coating ensure a tight seal.

Specifications

Brand: Cometic Gasket
Part #: C5956-040

Cometic GM Marine 3.0 Iron Duke 4.000in Bore .040in Vortec MLS Head Gasket

Name: Cometic GM Marine 3.0 Iron Duke 4.000in Bore .040in Vortec MLS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-marine-3-0-iron-duke-4-000in-bore-040in-vortec-mls-hea-t14-4359716
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.

Fits 1962-1968 Chevrolet Chevy II. This Cometic MLS head gasket has a 0.040" compressed thickness and Viton coating for improved sealing.

Key Features

Fits 1962-1968 Chevrolet Chevy II.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are embossed and coated with Viton, a heat-resistant elastomer.
Compressed operating thickness is 0.040 inches.
Designed for a 4.000 inch bore.
No 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

When you're rebuilding the top end of your 1962-1968 Chevrolet Chevy II, a solid head gasket is crucial for sealing the combustion chamber. This Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the demands of your engine. It features multiple layers of stainless steel for strength and corrosion resistance, with the outer layers coated in Viton, a heat-resistant rubber material that can handle temperatures up to 482°F (250°C).

The compressed operating thickness of this gasket is 0.040 inches, and it's designed for a 4.000-inch bore. MLS gaskets are ideal for both aluminum and cast iron blocks and heads, as they can manage the shearing forces that occur between different metals. Because they are made from multiple layers of stainless steel, these gaskets offer increased strength and the ability to rebound, which helps maintain a strong seal without needing additional sealants.