Factory Auto Engine Assembly Motor N52B25 N52B30 for BMW Bare piston engine

Overview of (B6C)2 Series Assemblies

(B6C)2 Series assemblies are engineered to provide superior performance in environments where accuracy, durability, and efficiency are paramount. They are designed to meet stringent industry standards and can be tailored to specific application requirements. The series is known for integrating complex functionalities into compact designs, reducing the overall footprint while enhancing operational capabilities.
These assemblies might include integrated circuits, sensors, actuators, connectors, and other electronic or mechanical components that work together seamlessly. The design philosophy behind (B6C)2 Series emphasizes modularity, allowing for easy upgrades and maintenance without compromising on performance.

Features of (B6C)2 Series Assemblies

High Precision: Manufactured with tight tolerances to ensure accurate operation in demanding conditions.
Compact Design: Integrates multiple components into a streamlined package, saving space and weight.
Durability and Reliability: Built to withstand harsh environments and offer long-term stable performance.
Integrated Functionality: Combines various functions into one assembly, reducing complexity and improving efficiency.
Customizable Options: Can be customized to fit specific application needs, including material selection, configuration, and performance parameters.
Ease of Installation: Designed for straightforward integration into existing systems, often featuring plug-and-play capability.
Advanced Materials: Utilizes cutting-edge materials for enhanced performance characteristics such as heat resistance, corrosion resistance, and strength.
Compliance with Standards: Adheres to relevant international and industry-specific standards for safety and performance.
Modular Design: Facilitates easy upgrades and maintenance, with components that can be individually replaced or updated.
Performance Optimization: Optimized for energy efficiency and performance, contributing to reduced operational costs over time.

(Factory Auto Engine Assembly Motor N52B25 N52B30 for BMW Bare piston engine)

Specification of Factory Auto Engine Assembly Motor N52B25 N52B30 for BMW Bare piston engine

The Factory Auto Engine Assembly Motor N52B25 and N52B30 for BMW is a high-performance, lightweight inline-6 engine designed for precision and durability. These engines are OEM-grade replacements or upgrades for BMW vehicles, crafted to meet strict factory standards. The N52B25 displaces 2.5 liters (2497 cc), with a bore x stroke of 82mm x 78.8mm, while the N52B30 offers a 3.0-liter (2996 cc) displacement, featuring an 85mm bore and 88mm stroke. Both engines utilize an aluminum block with magnesium-alloy composite construction, reducing weight without compromising strength. The cylinder head is aluminum, integrating Double VANOS (variable camshaft timing) and Valvetronic (variable valve lift) systems for optimized power delivery and fuel efficiency. The N52B25 generates up to 215 horsepower at 6500 RPM and 184 lb-ft of torque at 2750–4250 RPM, while the N52B30 produces 255 horsepower at 6600 RPM and 220 lb-ft of torque at 2500–4000 RPM. Compression ratios are 11.0:1 (N52B25) and 10.7:1 (N52B30), paired with electronic port fuel injection for responsive throttle control. These engines feature a forged steel crankshaft, aluminum pistons with friction-reducing coatings, and a maintenance-free timing chain. The assembly includes the block, pistons, connecting rods, crankshaft, cylinder head, and valvetrain components but excludes peripherals like intake/exhaust manifolds, sensors, or accessories. Designed for models such as the E90 325i/330i, E60 525i/530i, and E83 X3, this bare piston engine is ideal for rebuilds, swaps, or performance builds. Key innovations include an electric water pump, composite intake manifold (not included), and reduced internal friction for enhanced longevity. Built to OEM tolerances, this engine ensures seamless compatibility with BMW’s original electronics and mounting systems, offering a reliable solution for enthusiasts and technicians seeking factory-level quality.

(Factory Auto Engine Assembly Motor N52B25 N52B30 for BMW Bare piston engine)

Applications of Factory Auto Engine Assembly Motor N52B25 N52B30 for BMW Bare piston engine

The Factory Auto Engine Assembly Motor N52B25 and N52B30 bare piston engines are critical components for BMW’s inline-6 naturally aspirated powertrains, designed to deliver precision performance and durability. These engines are renowned for their lightweight aluminum-silicon alloy construction, Valvetronic variable valve timing, and Double-VANOS camshaft adjustment, which optimize power output and fuel efficiency. The N52B25 (2.5L) and N52B30 (3.0L) variants are widely used in BMW models like the E90 3 Series (325i, 330i), E60 5 Series (525i, 530i), E63/E64 6 Series, E83 X3, and E85 Z4. Their bare piston assemblies are engineered for direct replacement or performance upgrades, ensuring compatibility with BMW’s advanced engine management systems.

Applications:
1. Engine Rebuilding & Repair: Ideal for restoring worn engines, these pistons provide OEM-grade fitment, addressing issues like piston ring wear or cylinder scoring. Their high-strength design maintains compression ratios (11.0:1 for N52B25, 10.7:1 for N52B30) and ensures reliable operation under thermal stress.
2. Performance Tuning: Enthusiasts and tuners use these pistons to rebuild or upgrade engines for increased displacement or forced induction setups. The forged-like durability supports higher RPM limits and turbocharging without compromising engine integrity.
3. OEM Restoration: Perfect for maintaining authenticity in classic BMWs, the pistons replicate factory specs, including bore dimensions (82mm for N52B25, 85mm for N52B30) and weight distribution, ensuring seamless integration with Valvetronic and VANOS systems.
4. Preventive Maintenance: Replacing pistons during overhauls minimizes oil consumption and prevents valve timing errors caused by excessive piston-cylinder clearance.

Technical Advantages:
The pistons feature low-friction coatings and optimized skirt designs to reduce wear, while the aluminum-silicon alloy enhances heat dissipation. Precision machining ensures tight tolerances for consistent cylinder wall contact, critical for maintaining BMW’s signature smooth power delivery. Compatible with both manual and automatic transmissions, these pistons are vital for preserving the N52 engine’s balance of efficiency (up to 268 hp in N52B30) and longevity. Whether for daily drivers, track builds, or concours-grade restorations, the N52B25 and N52B30 bare pistons offer a reliable foundation for maximizing BMW engine performance.

Company Profile

PDDN Photoelectron Technology Co., Ltd.(sales@pddn.com) is one of the leading enterprises in power electronics technology and power products, which is fully involved in developing solar inverters， transformers, voltage regulators, distribution cabinets, thyristors， modules， diodes， heaters, and other electronic devices or semiconductors. We will be committed to providing users with high-quality, efficient products and considerate service.

It accepts payment via Credit Card, T/T, West Union, and Paypal. PDDN will ship the goods to customers overseas through FedEx, DHL, by sea, or by air. If you want high-quality Factory Auto Engine Assembly Motor N52B25 N52B30 for BMW Bare piston engine, please send us inquiries; we will be here to help you.

Payment Methods

L/C, T/T, Western Union, Paypal, Credit Card etc.

Shipment

By sea, by air, by express, as customers request.

Storage Conditions

1) Store in a dry environment at room temperature.

2) Avoid damp and high temperature.

3) Use immediately after opening the inner packing bag.

5 FAQs of Factory Auto Engine Assembly Motor N52B25 N52B30 for BMW Bare piston engine

What vehicles are compatible with the N52B25 and N52B30 bare piston engines? The N52B25 (2.5L) and N52B30 (3.0L) engines are designed for BMW models produced between 2004 and 2015, including the E90 3 Series (325i, 328i, 330i), E60 5 Series (525i, 528i, 530i), and E83 X3 (xDrive30i). Verify your vehicle’s engine code and production year for compatibility, as these engines may also fit some Z4 and 1 Series models.

What components are included in the bare piston engine assembly? The assembly includes the engine block, pistons, piston rings, connecting rods, crankshaft, and main bearings. It excludes external components like the cylinder head, valvetrain, oil pump, timing chain, sensors, manifolds, and accessories. This configuration is ideal for rebuilds requiring a refreshed short-block foundation.

Are the N52B25 and N52B30 engines reliable long-term? When maintained properly, these engines are durable, but their magnesium-aluminum composite blocks can corrode if exposed to low-quality coolant or neglected cooling systems. Common issues include oil leaks from the valve cover or oil filter housing gaskets and wear on valve stem seals. Regular oil changes using BMW-approved LL-01 oil (5W-30 or 0W-40) are critical to prevent sludging and timing chain wear.

Can these engines handle performance upgrades? While the N52 responds well to software tuning, intake/exhaust mods, and lightweight components, the magnesium block isn’t suited for high-stress forced induction. For moderate upgrades, forged internals are unnecessary, but avoid exceeding 300–350 horsepower on the stock block. Turbocharging requires careful tuning to prevent heat-related damage.

What maintenance is essential for these engines? Change oil every 7,500–10,000 miles with synthetic oil meeting BMW LL-01 specs. Inspect the cooling system annually for leaks or degraded hoses, and replace coolant every 60,000 miles. Clean the magnesium block surface thoroughly during rebuilds to prevent gasket failures. Monitor the electric water pump and thermostat for early failure signs, and decarbonize the intake valves every 50,000 miles to address direct injection carbon buildup. Regularly check the timing chain tensioner and guides for wear.

(Factory Auto Engine Assembly Motor N52B25 N52B30 for BMW Bare piston engine)