What does 'O/S 010' mean for this bearing set?

O/S 010 indicates that the bearings in this set are 0.010 inches (or 0.25mm) undersize. This means they are designed to fit crankshaft journals that have been machined down by 0.010 inches during an engine rebuild.

What is the material of these main bearings?

These bearings are made from a bi-metal aluminum material with a lead-free composite overlay. This construction is chosen for its suitability in medium-load engine applications.

Are these bearings environmentally friendly?

Yes, the composite material used in these bearings is lead-free, making them an environmentally safe option.

Specifications

Brand: King Engine Bearings
Part #: MB5754SI0.25
UPC: 611500577604

King Engine Bearings Chevrolet 121Ci/Ln2 134Ci Fl O/S 010 (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Chevrolet 121Ci/Ln2 134Ci Fl O/S 010 (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chevrolet-121ci-ln2-134ci-fl-o-s-010-s-t14-770937
Price: 59.47 USD
Availability: BackOrder

$59.47

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

King Engine Bearings Main Bearing Set MB5754SI0.25. This set is 0.010 inch (0.25mm) undersize for Chevrolet 121Ci/Ln2 and 134Ci engines.

Key Features

This set is 0.010 inch (0.25mm) undersize.
Features a lead-free, environmentally safe composite material.
Constructed with a bi-metal aluminum material.
Ideal for medium-load engines.
Fits a wide range of Chevrolet, Buick, GMC, and Isuzu vehicles.

⚠️ 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

This King Engine Bearings Main Bearing Set includes the main bearings you need to get your engine back in shape. Specifically, this set is 0.010 inch (0.25mm) undersize, which is important if your crankshaft journals have been machined to this size during a rebuild.

King specializes in engine bearings, and this set is made with a lead-free composite material that's environmentally safe. It's a bi-metal aluminum construction, well-suited for medium-load engines like those found in many Chevrolet, Buick, and Pontiac vehicles. This set fits a range of vehicles, including models like the Chevrolet Cavalier, Buick Century, and Pontiac Sunfire.