There are a number of bearings sets for late model engine applications which contain bearings with no locating notch (lug). This design is usually specified by the OEM engine manufacturer, and is in line with the current OEM design practice of eliminating this feature on bearings.

Most of the major OEM Manufacturers have specified this design on some of their engines. This ‘notchless’ design can be used in place of the previous notched bearings, where there has been a change to the new design, later in an engine series. For OEMs that have the luxury of automated engine assembly, the notch has become a redundant feature. However, when assembling an engine featuring notchless bearings by hand, greater attention needs to be paid to bearing alignment and orientation.

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