What does the .060in bore size mean for my engine?

The .060in bore size indicates that this gasket is intended for use when your engine's cylinders have been machined (bored) out by 0.060 inches larger than their original factory size. This ensures a proper seal between the cylinder head and the block at the larger bore diameter.

Do I need to use any sealant with this gasket?

No, this Cometic MLS head gasket is designed to provide a maximum seal without the need for additional sealants. The Viton coating on the outer layers is specifically formulated to create a tight seal against the cylinder head and block surfaces.

What is the compressed thickness of this gasket?

When properly installed and compressed, this gasket has an operating thickness of 0.098 inches. This is an important measurement to consider when calculating compression ratios or ensuring proper piston-to-head clearance.

Specifications

Brand: Cometic Gasket
Part #: C5669-060
UPC: 191070426439

Cometic AMC 290/304/343/360 Gen-2/3 V8 .060in MLS Cylinder Head Gasket - 3.810in Bore

Name: Cometic AMC 290/304/343/360 Gen-2/3 V8 .060in MLS Cylinder Head Gasket - 3.810in Bore
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-amc-290-304-343-360-gen-2-3-v8-060in-mls-cylinder-head-ga-t14-805851
Price: 151.73 USD
Availability: BackOrder

$151.73

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Cometic MLS head gasket for AMC 290-360 V8 engines. Features Viton coating and 3.810in bore, 0.060in undersize.

Key Features

Fits a wide range of AMC 290, 304, 343, and 360 V8 engines, as well as Jeep applications.
Multi-Layer Steel (MLS) construction offers increased strength and rebound resistance.
Outer layers are coated with Viton, a heat-resistant elastomer, for a reliable seal without additional sealants.
Features a 3.810-inch bore and is 0.060 inches undersize, suitable for bored cylinders.
Designed to work with aluminum heads on aluminum or cast iron blocks.
Stainless steel layers provide corrosion resistance.

⚠️ 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 AMC V8, whether it's a 290, 304, 343, or 360 cubic inch engine, getting the cylinder head gasket right is crucial for a solid seal. This Multi-Layer Steel (MLS) gasket from Cometic is built to handle the demands of these classic engines, offering a robust solution for your rebuild.

This gasket is constructed with multiple layers of stainless steel, which gives it excellent rebound and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing environments and various surface finishes, meaning you don't need to add any extra sealants. The center layer is stainless steel and can be varied in thickness; this particular gasket is designed with a 3.810-inch bore and is 0.060 inches undersize, intended to be used when the cylinders have been bored out to that dimension. It's well-suited for combinations of aluminum heads with aluminum blocks or aluminum heads with cast iron blocks, as the multi-layer design helps manage the shearing forces between different metals.

This gasket fits a range of American Motors and Jeep vehicles from the late 60s through the early 80s, including models like the Jeep CJ series and American Motors AMX. It's a well-built component designed for a reliable seal in your engine.