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5150 AutoSport

5150 AutoSport Head Gasket & Head Stud Kit, BMW M30

5150 AutoSport Head Gasket & Head Stud Kit, BMW M30

Normaler Preis $484.98 USD
Normaler Preis Verkaufspreis $484.98 USD
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Head Gasket Type - Bore - Thickness
Head Stud Kit

MLS Head Gasket:

This Cometic MLS Head Gasket is specifically engineered to replace BMW part # 11121730226 and 11121730227 for the M30B30, M30B34, and M30B35 is a 6-cylinder engine that was used in a variety of BMW models, including the E3, E9, E12 and E23.

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.

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.

Cut Ring Head Gasket:

This Athena Cut Ring Head Gasket is specifically engineered to replace BMW part # 11121730226 and 11121730227 for the M30B30, M30B34, and M30B35 is a 6-cylinder engine that was used in a variety of BMW models, including the E3, E9, E12 and E23.

Standard OEM & MLS gaskets can only handle a certain amount of cylinder pressures before they start to leak, making the Athena Cut Ring Head Gasket the recommended choice for applications making 16+ psi.

A compression leak passing the head gasket can cause a range of issues, including engine overheating, loss of power, misfires, and in severe cases, catastrophic engine failure.

Athena's gasket is crafted with premium quality reinforced M0115, an asbestos-free material that's original equipment approved and renowned for its superior quality. The AISI 304 stainless steel Cooper Rings bite into the aluminum head, providing maximum sealing capabilities around the cylinder bore and optimizing engine performance, even on engines with nitrous and/or turbo applications that exceed 2 bar boost.

Before installation, it is crucial to have the mating surfaces of the cylinder head and block professionally cleaned and resurfaced to ensure they are completely flat.

Please be aware that the gasket  should have a size that is 0.5mm to 1mm larger than the piston. For example, if the piston measures 84mm, then the gasket should be the next size up, either 84.5mm or 85mm.

Head Gasket 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 head 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 NOT recommended to use any additional sealant on the gasket. Using additional sealant can hinder the performance of the gasket.

Head Stud Kit

The M30B30, M30B34, and M30B35 is a 6-cylinder engine that was used in a variety of BMW models, including the E3, E9, E12 and E23.

Installing ARP head studs 201-4602 on a BMW M30 engine can provide several benefits, including increased clamping force and improved head gasket sealing, which can help prevent head gasket failure. This is particularly important on high-performance or turbocharged engines, where the increased cylinder pressure can put additional stress on the head gasket and bolts.

When installing ARP head studs on an engine, it's important to follow the manufacturer's instructions carefully and use the proper torque specifications and sequence. It's also a good idea to have the cylinder head and block checked for flatness and resurfaced if necessary, to ensure a proper seal.

Installation Instructions: 

1. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if necessary with ARP Thread Chaser.
2. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension.
3. If the cylinder head studs protrude into a water jacket, lubricate the block threads of the studs with ARP THREAD SEALER.
4. Screw studs into the block “HAND TIGHT ONLY”.
5. Install the cylinder head(s) and check for binding or misalignment.
6. Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.
Then install the washers and the nuts onto the studs and tighten them hand tight.
ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to motor oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when motor oil or other low quality lubricants are used.


7. Following the manufacturers recommended torque sequence tighten the nuts steps 1-3

Step 1: Tighten to 30 ft-lbs.
Step 2: Tighten to 60 ft-lbs.
Step 3: Tighten to 90 ft-lbs.

with ARP Ultra-Torque fastener assembly lubricant

Bolt Torque Sequence

 12  10 4 2 6 8 14
13 7 5 1 3 9 11


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