What is the compressed thickness of this head gasket?

The compressed operating thickness of this Cometic head gasket is 0.036 inches. This is achieved through its multi-layer steel design with a specific center shim layer.

Does this gasket require any sealant when installed?

No, Cometic MLS head gaskets are designed to provide maximum sealing performance on their own and do not require any additional sealants. The Viton coating on the outer layers ensures a reliable seal.

Can this gasket be used with different head and block materials?

Yes, MLS gaskets are ideal for applications using aluminum heads with either aluminum blocks or cast iron blocks. They are built to withstand the shearing forces that can occur between dissimilar materials.

Specifications

Brand: Cometic Gasket
Part #: C5741-140

Cometic Chevy 229/262 V6 4.3L 4.155in .140in MLS Head Gasket

Name: Cometic Chevy 229/262 V6 4.3L 4.155in .140in MLS Head Gasket
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-chevy-229-262-v6-4-3l-4-155in-140in-mls-head-gasket-t14-718811
Price: 151.73 USD
Availability: BackOrder

$151.73

On Backorder

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

Cometic MLS head gasket for Chevy 4.3L V6 with 4.155in bore. Built with Viton coating for reliable sealing.

Key Features

Fits a wide range of Chevrolet and GMC vehicles, including 1985-1995 C/K series trucks and S10 models.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are coated on both sides with Viton, a heat-resistant elastomer rated to 482°F.
Compressed operating thickness is 0.036 inches.
Bore diameter is 4.155 inches.
Designed for high-output engines and does not require 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

This Cometic Multi-Layer Steel (MLS) head gasket is built with a specific design in mind: sealing high-output engines reliably. It features multiple embossed layers of stainless steel, with the outer layers coated on both sides with Viton, a heat-resistant rubber material rated up to 482°F. This construction helps it withstand the forces created when mating different block and head materials, like aluminum to cast iron, and it doesn't require any additional sealants.

The center layer of stainless steel can be varied to achieve different thicknesses, and in this case, it's set at .140 inches compressed thickness, with a 4.155-inch bore diameter. This makes it a solid option for many Chevrolet and GMC trucks and SUVs from the mid-80s to the mid-90s, including popular models like the S10, C1500, and Astro vans. The stainless steel construction not only adds strength but also helps the gasket rebound and resist corrosion over time.