Cylinder Block - Inspection for Reuse (1-02) Section 1 - Cylinder Block - Group 01 M11 Page 1-16 If the checking ring will not go through the bore, visually inspect the bore for burrs and other obstructions. After removing any burrs, if the checking ring still will not go through the bore, mark the bore for repair. If the checking ring will pass through the bore without any resistance, center the checking ring in the bore. Use a feeler gauge 0.08 mm [0.003 inch] that is not more than 12.7 mm [1/2 inch] wide. Insert the feeler gauge between the checking ring and the cylinder block. Rotate the feeler gauge completely around both sides of the checking ring.