Cometic Multi-layer Steel Head Gasket, BMW S14

This Cometic MLS Head Gasket is designed to replace BMW part number 11121316714, specifically for the S14B20, S14B23, S14B25, and S14B27 E30 M3 engines. 

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 S14B factory head gasket specifications are 93.4mm Bore with a thickness of 0.070 inches.

H1869SPB070S, H1869SPB080S, H1869SPB089S, H1869SPB098S, H1869SPB120S, H1869SPB140S
C4295-070, C4295-080, C4295-089, C4295-120, C4295-140
C4294-070, C4294-080, C4294-089, C4294-120, C4294-140

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 S14 Applications:

BMW S14B20

1989-1991      E30     320is [Portugal and Italy]

BMW S14B23

1986-1991      E30     M3
1986-1987      E30     M3 Evo I
1988      E30     M3 Evo II

BMW S14B25

1990      E30     M3 Sport Evo (Evo III)