What does the .060in undersize mean for this head gasket?

The .060in undersize designation means this gasket is intended for engines where the cylinders have been bored out by 0.060 inches. It's designed to seal properly in these modified engine blocks.

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

No, Cometic MLS head gaskets are designed to provide maximum sealing performance without the need for additional sealants. The multi-layer steel construction and Viton coating ensure a proper seal on their 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, rated up to 482°F (250°C). It's used on the outer layers of this gasket to ensure a durable and reliable seal in the demanding conditions found in an engine's combustion chamber.

Specifications

Brand: Cometic Gasket
Part #: C5988-060
UPC: 191070145767

Cometic AMC 4.0L Inline 6 .060in MLS Cylinder Head Gasket - 4.000in Bore

Name: Cometic AMC 4.0L Inline 6 .060in MLS Cylinder Head Gasket - 4.000in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-amc-4-0l-inline-6-060in-mls-cylinder-head-gasket-4-000in--t14-807395
Price: 134.43 USD
Availability: InStock

$134.43

Only 1 left in stock

Cometic AMC 4.0L Inline 6 .060in MLS Head Gasket. Features Viton coating for heat resistance and a 4.000in bore.

Key Features

Fits 1987-2001 Jeep Cherokee, 1987-1992 Jeep Comanche, 1993-2004 Jeep Grand Cherokee, 1987-1990 Jeep Grand Wagoneer, 1987-1990 Jeep Wagoneer, and 1991-2006 Jeep Wrangler models.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are embossed and coated with Viton, a heat-resistant elastomer rated up to 482°F (250°C).
Designed for a 4.000 inch bore and is 0.060 inches undersize for bored engines.
Compressed operating thickness is 0.098 inches.
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

This is a Cometic Multi-Layer Steel (MLS) cylinder head gasket designed for AMC 4.0L inline 6 engines. It has a 4.000 inch bore and is 0.060 inches undersize, meaning it's intended for engines that have been bored out by that amount. This gasket is built with multiple layers of stainless steel, giving it increased strength and the ability to rebound, which helps it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit, making it suitable for demanding sealing environments.

MLS gaskets are a solid choice for engines with high output demands, whether you're pairing aluminum heads with an aluminum block or aluminum heads with a cast iron block. The multi-layer design helps manage the shearing forces that can occur between different metals. Because it's a well-built MLS gasket, it doesn't require any additional sealants for installation, simplifying the process. The center layer is uncoated stainless steel and can be varied to achieve different thickness requirements, though this specific gasket has a compressed operating thickness of 0.098 inches.

This gasket fits a range of Jeep vehicles, including models like the Cherokee, Grand Cherokee, and Wrangler. Always refer to the manufacturer's installation instructions for proper torque sequences and any specific preparation steps.