What does the +0.50mm sizing mean for these bearings?

The +0.50mm sizing indicates that these bearings are intended for use when the crankshaft main journals have been machined down by 0.50mm. This is a common practice during engine rebuilding to ensure a proper fit with worn or reconditioned crankshafts.

What materials are used in these King Engine Bearings?

These bearings are made from a bi-metal aluminum material. They feature a lead-free composite for environmental safety and incorporate Manganx strengthening to enhance durability.

Are these bearings a direct replacement for all N63/S63 engines?

These are main bearings for N63 and S63 engines and are sized at +0.50mm. Always confirm your specific engine's requirements and crankshaft journal condition before ordering bearings, as standard sizes or different undersizes may be needed.

King Engine Bearings BMW N63/S63 Crankshaft Main Bearing Set - Size +0.50mm

Specifications

Brand: King Engine Bearings
Part #: MB5801SM0.5
UPC: 611500596865

King Engine Bearings BMW N63/S63 Crankshaft Main Bearing Set - Size +0.50mm

Name: King Engine Bearings BMW N63/S63 Crankshaft Main Bearing Set - Size +0.50mm
Brand: King Engine Bearings
Price: 195.90 USD
Availability: InStock

$195.90

Only 5 left in stock

King Engine Bearings BMW N63/S63 crankshaft main bearing set. Size +0.50mm. Well-built bearings for a range of BMWs.

Key Features

Fits 19+ BMW vehicle combinations including 550i, 750i, X5, and X6 models.
Main bearing set for BMW N63 and S63 engines.
Bearings are sized +0.50mm for use with machined crankshaft journals.
Constructed with a lead-free, environmentally safe composite material.
Features Manganx strengthening within an aluminum bi-metal construction.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

This is a King Engine Bearings crankshaft main bearing set, specifically the MB5801SM0.5 part number. This set includes the main bearings, which are crucial for supporting the crankshaft within the engine block and ensuring it spins smoothly. These bearings are designed for BMW N63 and S63 engines and are sized at +0.50mm, meaning they are intended for use when the crankshaft journals have been machined down by 0.50mm during an engine rebuild.

King Engine Bearings specializes in creating high-quality engine bearings. These particular bearings utilize a lead-free composite material, which is environmentally safe, and feature Manganx strengthening within an aluminum bi-metal construction. This combination aims to provide durable and reliable performance for the demanding environment inside an engine. They fit a wide range of BMW models, including the 550i, 750i, X5, and X6, among others, making them a solid option for many N63/S63 engine rebuilds.