ACL .025 Oversized Main Bearing Set

Fits 1988–1994 BMW E30 316i and 1990–1994 BMW E36 316i

Part #: 5M1538H-.025

Overview

The ACL .025 Oversized Main Bearing Set is a high-performance engine component designed for enthusiasts and professionals seeking reliable, durable bearings for their BMW engines. Crafted with precision engineering, these bearings are engineered to support higher RPM conditions and demanding driving scenarios, ensuring your engine maintains optimal performance and longevity. Whether you're rebuilding or upgrading, this set provides a trusted solution for maintaining engine integrity and smooth operation.

Key Features

Designed with advanced metallurgy and engineering, the ACL .025 Oversized Main Bearing Set offers:

• Premium tri-metal construction for durability and wear resistance
• Precisely engineered to match specific engine requirements
• Supports higher RPM operation for performance driving
• Manufactured to strict quality standards for reliability
• Affordable high-performance alternative to OEM bearings
• Easy to install with exact fitment for specified BMW models

Construction & Design

This bearing set features a tri-metal construction combining a steel backing with a copper and aluminum alloy overlay, providing excellent load capacity and heat dissipation. The precise machining ensures a perfect fit, reducing engine wear and enhancing overall performance. The .025 oversized design allows for engine rebuilds where bore sizes are increased, restoring proper clearance and oil film thickness.

Performance & Driving Experience

These main bearings are designed to withstand the stresses of high RPM operation, supporting engine stability and smoothness. They help maintain proper oil clearance, reducing the risk of bearing failure and engine damage during aggressive driving or performance tuning. The high-quality materials contribute to consistent performance and long-term durability.

Installation & Fitment

Installation requires proper engine disassembly and precise measurement to ensure correct bore sizing. These bearings are intended for professional installation or experienced enthusiasts familiar with engine rebuild procedures. Confirm compatibility with your specific BMW model and engine specifications before installation.

What’s Included

This set includes all main bearings necessary for a complete engine rebuild or refresh, ensuring consistent quality and fitment across all bearing surfaces.