Measuring Cylinder Bore Diameter
WARNING: This page is about a different car, the 2009 Saturn Vue. 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 J 8087: gage.
Compare your results with the Engine Mechanical Specifications (LY7) or Engine Mechanical Specifications (LCS) . If the cylinder diameter exceeds the specifications, the cylinder block may be oversized to 0.25 mm (0.010 in). There is only one size of oversized pistons and rings available for service.