5150 AutoSport Head Gasket & Head Stud Kit, BMW N54

5150 AutoSport Head Gasket & Head Stud Kit, BMW N54

SKU: 5150-autosport-head-gasket-head-stud-kit-bmw-n54 Category: Tags:

Description

Cut-Ring Head Gasket:

The Athena Cut Ring Head Gasket is designed as a direct replacement for BMW part # 11127557265 and 11127557266, specifically for use in N52 and N54 turbocharged inline-six engines. These engines can be found in a variety of models including the 135i, 335i, 535i, Z4 sDrive35i, X6 xDrive35i, and Alpina B3 Bi-Turbo.

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.

MLX Head Gasket:

The Cometic MLX Head Gasket is designed as a direct replacement for BMW part # 11127557265 and 11127557266, specifically for use in N54B30 turbocharged inline-six engines. These engines can be found in a variety of models including the 135i, 335i, 535i, Z4 sDrive35i, X6 xDrive35i, and Alpina B3 Bi-Turbo.

The factory head gasket specifications for the N54 are 85mm bore and 0.048 inches thickness.

Constructed with multiple layers of stainless steel and a proprietary coating, the MLX gasket offers superior sealing and load distribution capabilities. The coating is designed to withstand high temperatures and pressures, preventing gasket failure due to fatigue or stress. Additionally, the unique embossed sealing bead provides further sealing ability.

It’s important to note that MLS/MLX head gaskets are not compatible with engines that have O-rings or receiver grooves around the cylinder bores. These gaskets require smooth and flat surfaces to seal properly.

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 recommended to not use any additional sealant on the head 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 the performance of your BMW N54 engine with our custom-designed Head Stud Kit, brought to you by ARP – the world leader in fastener technology.

This kit is engineered to replace BMW part # 11127574303 and is compatible with BMW N54B30 turbocharged inline-six engines found in a range of models, 135i, 335i, 535i, Z4 sDrive35i, X6 xDrive35i, and Alpina B3 Bi-Turbo.

This kit comes with 14x 11mm Studs, 14x Washers, and 14x Nuts offering increased clamping force and enhanced head gasket sealing, which can prevent head gasket failure. This is particularly crucial for high-performance or turbocharged engines, as the increased cylinder pressure puts additional stress on the head gasket and bolts.

Please note that this Head Stud Kit is not a retrofit from a Chrysler or Volvo stud kit. Unlike those kits, our kit was specifically designed for the BMW N54 engines.

Installation Instructions: 

N54 Standard Kit: This Standard Kit is a hassle-free, Bolt-On kit that requires no additional modifications. It includes all the necessary components for installation, including:

10x 11mm Head Studs,10x 11mm Washers, 10x 11mm Nuts, 4x 9mm Head Studs, 4x 9mm Washers, and 4x 9mm Nuts. 

This comprehensive kit is designed to make installation easy and straightforward, providing all the necessary components for a successful upgrade.
High Boost Kit, it is a MUST to drill and tap the four outer 9mm holes in the engine block to increase their size to 11mm holes. This will ensure that all the engine block holes are uniform in size and can accommodate all 14x 11mm Studs. Additionally, it will help distribute even force across the cylinder head-gasket surface.
includes: 14x 11mm Studs, 14x Washers, and 14x Nuts. 
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.
PRELOAD (TORQUE) RECOMMENDATIONS
7. Following the manufacturers recommended torque sequence tighten the nuts steps 1-3
Standard Kit: 
Torque all 11 mm studs as follows:
Step 1: Tighten to 30 ft-lbs.
Step 2: Tighten to 60 ft-lbs.
Step 3: Tighten to 95 ft-lbs.
Torque all 9mm studs to 45 ft-lbs.  
High Boost Kit: 
Step 1: Tighten to 30 ft-lbs.
Step 2: Tighten to 60 ft-lbs.
Step 3: Tighten to 95 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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