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Home >> Chevrolet >> 2011 >> Impala LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Engine Mechanical - 3.6L (Ly7) (Repair Instructions -- 3 Of 5)) >> Off-Vehicle Repair Instructions - Part 2 >> Engine Block Cleaning and Inspection >> Measuring Cylinder Bore Diameter

Measuring Cylinder Bore Diameter

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Measuring Cylinder Bore
GM4972Courtesy of GENERAL MOTORS CORP.

Measure the cylinder bore diameter 37 mm (1.457 in) from the deck face using the J 8087  .

Compare your results with the Engine Mechanical Specifications . 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.