Cometic Multi-layer Steel Head Gasket, BMW M10

This Cometic MLS Head Gasket is designed to replace BMW M10B18 and M10B20 engine head gaskets. 

Cometic MLS Gaskets are composed of multiple layers of stainless steel, the number of layers used varying by application. These layers consist of both proprietary, high-temperature coated and uncoated stainless steel. Additional layers increase active seal height and can be used to fine-tune compression.

The specialized coating used on Cometic Gaskets conforms to the surfaces of the cylinder head and engine block on the first heat cycle, creating a chemical bond. MLS Gaskets are able to prevent blow-outs in engines with high cylinder pressure because the embossed layers act as a ‘spring’ and compensate for increased head lift. 

Please note, MLS head gaskets can NOT be used with motors that have O-rings or receiver grooves around the cylinder bores because they require smooth and flat surfaces to seal.

The M10 factory head gasket specifications are 89mm Bore with a thickness of 0.060 inches.

Installation instructions:

1. Make sure that the engine block and cylinder head surfaces are clean, flat, and free from any debris, oil, or coolant.

2. Install the MLS gasket on the engine block and ensure that it is properly aligned. Avoid twisting or bending the gasket during installation.

3. Place the cylinder head on top of the gasket and install the head bolts or studs in their correct positions.

4. Follow the manufacturer's recommended torque specifications and tighten the bolts or studs in the proper sequence to ensure even clamping force across the gasket.

5. After the initial tightening, re-torque the head bolts or studs after the engine has been started and then allowed to cool to room temperature. This will ensure that the gasket is properly seated and compressed.

6. It is recommended to not use any additional sealant on the MLS gasket, as it is already coated with a Viton rubber sealant. Using additional sealant can hinder the performance of the gasket.

BMW M10B18 Applications:

BMW 02 Series

1971-1975     1802

BMW 3 Series

1975-1983     E21     316 / 318
1982-1987     E30     316 / 318i

BMW 5 Series

1972-1977     E12     518

BMW M10B20 Applications:

BMW New Class Series

1966-1972     2000 / 2000Tii
1973-1974     2000 Turbo

BMW 3 Series

1975-1983     E21     320 / 320i