Measuring the Cylinder for Oversize
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Adjust the micrometer to a dimension slightly smaller than the bore size. Refer to Engine Mechanical Specifications (RPO LY5 VIN J) or Engine Mechanical Specifications (RPO LC9 VIN 3) or Engine Mechanical Specifications (RPO LY2 VIN C) or Engine Mechanical Specifications (RPO LH6 VIN M) or Engine Mechanical Specifications (RPO LMG VIN 0) or Engine Mechanical Specifications (RPO LY6 VIN K) or Engine Mechanical Specifications (RPO L76 VIN Y) or Engine Mechanical Specifications (RPO L92 VIN 8) .
- Insert the J 8087 into the micrometer and zero the bore gage dial.
- Use the J 8087
and measure the cylinder bore for oversize.
Slide the bore gage up and down throughout the length of the cylinder bore. Measure the bore, both parallel and perpendicular to the centerline of the crankshaft, at the top, center, and bottom of the bore. A cylinder bore that exceeds the maximum diameter must be serviced with an oversized piston. Refer to Engine Mechanical Specifications (RPO LY5 VIN J) or Engine Mechanical Specifications (RPO LC9 VIN 3) or Engine Mechanical Specifications (RPO LY2 VIN C) or Engine Mechanical Specifications (RPO LH6 VIN M) or Engine Mechanical Specifications (RPO LMG VIN 0) or Engine Mechanical Specifications (RPO LY6 VIN K) or Engine Mechanical Specifications (RPO L76 VIN Y) or Engine Mechanical Specifications (RPO L92 VIN 8) .