ACL

5M1777-STD

ACL 5M1777-STD Main Bearing Set

Rod & Main Bearings

1977-1990 > Mazda > All Models > Mazda 4 Cylinder 2977-3455cc
** NOTE : PRODUCT IMAGE MAY NOT BE VEHICLE SPECIFIC

ACL's main bearings are made of a softer metal so that you don't wear out your crank or engine block. Additionally a thin layer of oil lubricates the connection between the bearings and the crank allowing the crank to "float" and reduce wear. Proper support via main bearings is crucial to prevent oscillations and wear that can damage the crankshaft and other components as the motor moves further out of balance.

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