What does the '+1.0mm' size mean for these bearings?

The '+1.0mm' designation indicates that these bearings are oversized by 1.0 millimeter. They are intended for use when the crankshaft journals have been machined down by 1.0mm to remove wear or damage. It's essential to measure your crankshaft journals after machining to ensure this size is correct for your rebuild.

Are these bearings suitable for high-performance or racing engines?

These bearings are described as ideal for medium-load engines. For high-performance or racing applications, you may need to consult King Engine Bearings' performance line or other specialized bearing types that are designed for higher stress and load conditions.

What is the material composition of these bearings?

These bearings are made from a bi-metal aluminum material and feature a lead-free composite overlay. This composition is chosen for its suitability in medium-load engines and for environmental safety.

Specifications

Brand: King Engine Bearings
Part #: MB5257SI1.0
UPC: 611500435614

King Engine Bearings General Motors 379/V8 Ohv (Size +1.0mm) Main Bearing Set

Name: King Engine Bearings General Motors 379/V8 Ohv (Size +1.0mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-general-motors-379-v8-ohv-size-1-0mm-m-t14-770602
Price: 74.61 USD
Availability: BackOrder

$74.61

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King Engine Bearings General Motors 379/V8 Ohv (Size +1.0mm) Main Bearing Set. Lead-free composite bearings for medium-load engines.

Key Features

Fits 78+ vehicle make/model combinations.
Main bearing set for General Motors 379/V8 Ohv engines.
Size is +1.0mm, intended for machined crankshaft journals.
Features a lead-free composite material.
Constructed with bi-metal aluminum material.
Suitable for medium-load engine applications.

⚠️ 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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About this part

Product Details

If you're rebuilding the bottom end of your General Motors V8 engine, getting the main bearings right is crucial for smooth operation and longevity. This set from King Engine Bearings is designed for medium-load applications and uses a lead-free composite material that's environmentally safe.

King has been specializing in bearings since 1960, focusing on supplying well-built engine bearings. This particular set is a bi-metal aluminum type, offering a solid foundation for your crankshaft. It's important to note that these are a +1.0mm size, meaning they are intended for use when the crankshaft journals have been machined down by 1.0mm to clean up wear or damage. Always confirm your machining specs before ordering.

This main bearing set fits a wide range of General Motors vehicles from the early 80s through the late 90s, including popular models like the Chevrolet C1500 and Blazer. Make sure to check the full fitment list to confirm compatibility with your specific application.