Measuring Cylinder Bore Diameter
WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Measure the cylinder bore diameter 37 mm (1.457 in) from the deck face using the EN - 8087 gauge.
Compare your results with the Engine Mechanical Specifications . If the cylinder diameter exceeds the specifications, the engine block may be oversized to 0.25 mm (0.010 in). There is only one size of oversized pistons and rings available for service.