MLS Head Gasket:
This Cometic MLS Head Gasket is specifically engineered to replace BMW part # 11121721546, 11121721547, 11121721550, 11121721551 for the M40B16, M40B18, M42 B18, or M44 B19 engine.
Multi-Layer Steel also known as "MLS" head gaskets are preferred as an aftermarket alternative for high-performance BMW engines, including supercharged and turbocharged models, as they offer better performance than factory gaskets.
The M40 and M42 factory head gasket specifications are 84mm Bore with a thickness of 0.070 inches.
The M43 and M44 factory head gasket specifications are 85mm Bore with a thickness of 0.070 inches.
MLS Gaskets provide maximum sealing performance for high-output engines, without the need for sealants. These gaskets resist shearing forces and reduce bore distortion with their embossing design.
Comprised of multiple layers of stainless steel, they are durable and corrosion-resistant. Ideal for high-performance engines, MLS head gaskets offer superior sealing and can withstand high levels of heat and pressure.
When choosing an MLS gasket for your BMW, ensure compatibility, thickness, and bore size, and follow installation and torque specifications to avoid engine damage.
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.
MLS Installation Instructions:
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Make sure that the engine block and cylinder head surfaces are clean, flat, and free from any debris, oil, or coolant.
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Install the MLS gasket on the engine block and ensure that it is properly aligned. Avoid twisting or bending the gasket during installation.
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Place the cylinder head on top of the gasket and install the head bolts or studs in their correct positions.
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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.
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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.
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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.
Head Stud Kit
Upgrade your BMW M40, M42, M43 or M44 engine with the ARP Head Stud Kit, designed specifically for E36 and Z chassis.
ARP provides an elevated driving experience with increased clamping force, improved head gasket sealing, and enhanced overall engine strength. This is made possible by the use of ARP 2000, a high-strength alloy steel material that is utilized in the production of fasteners such as bolts, studs, and nuts. Developed in-house by Automotive Racing Products, ARP 2000 is engineered to endure extreme loads and stresses that are often encountered in high-performance engines.
Head Stud Kit Installation Instructions:
7 | 3 | 1 | 5 |
9 |
10 | 6 | 2 | 4 | 8 |
BMW M40 Applications:
3 Series
1987-1994 E30 316i / 318i
1991-1993 E36 316i / 318i / 318is
5 Series
1988-1992 E34 518i
BMW M42 Applications:
3 Series
1989-1991 E30 318i / 318is
1992-1996 E36 318i / 318is
BMW M43 Applications:
3 Series
1993-1998 E36 316i / 318i / 318is
1998-2001 E46 316i / 318i
5 Series
1994-1996 E34 518i
1995-2000 E39 518i
Z Series
1995-1999 E36/7 Z3 1.8i
1999-2000 E36/7 Z3 1.9i
BMW M44 Applications:
3 Series
1996-1999 E36 318i / 318is
Z Series
1996-1999 E36/7 Z3 1.9i