BMW M3 E46 S54 S54B32 11117838751 Engine Block + Piston NEW

For the BMW E46 M3 (and other S54-equipped models), the part number 11117838751 designates the most comprehensive “short block” foundation available from BMW. While it is often listed simply as a “Cylinder Block,” this specific OEM SKU is a factory-bundled set that includes the pre-fitted pistons.

1. Package Contents: What’s in the Box?

Purchasing this part number “New in Original Packaging” ensures you are getting a factory-spec assembly rather than a bare iron casting. It includes:

• S54 Cylinder Block: The legendary cast-iron block known for its high-pressure resistance and relatively slim bore walls.

• 6x Genuine Pistons: Pre-matched and installed to the specific tolerances of the bores.

• Piston Rings & Pins: Pre-assembled on the pistons.

• Oil Spray Nozzles: Typically pre-installed at the base of the cylinders for piston crown cooling.

• Core Plug/Welsh Plugs: Already pressed into the block.

Important Note: This is not a “Full Short Block.” It typically does not include the crankshaft, connecting rods, or main bearings. These must be sourced separately or transferred from your existing engine.

2. Technical Specifications

3. Why Buy New OEM (11117838751)?

For the S54, “New Old Stock” or factory-new blocks are becoming increasingly rare and valuable.

• Factory Tolerances: S54 blocks are sensitive to over-boring. A new block provides the standard 87.0mm bore with the factory-honed crosshatch, essential for proper ring seating and oil control.

• No Stress Fractures: High-mileage S54 blocks can occasionally develop hairline fatigue. A new casting ensures structural integrity for high-revving (8,000+ RPM) or forced-induction builds.

• CSL Compatibility: This is the same base casting used for the M3 CSL, making it the correct “purist” choice for high-value restorations.

4. Essential Companion Parts

If you are starting a build with this block, you will inevitably need the following associated parts to complete the bottom end:

• Crankshaft (S54): Part # 11217832125 (Forged steel).

• Connecting Rods: Part # 11247834438 (or aftermarket forged H-beams).

• Main Bearing Set: Note that S54 main bearings are color-coded (Yellow/Green/White) based on the specific crankshaft journal measurements.

• Head Gasket Set: Part # 11127835918.