Measuring the Cylinder for Oversize
WARNING: This page is about a different car, the 2007 Hummer H2. 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.
Adjust the micrometer to 101.62 mm (4.0 in) for 6.0 liter engines.
- Insert the bore gage into the micrometer and zero the bore gage dial.
- Use the J 8087
, or equivalent, and measure the cylinder bore for oversize. See Special Tools .
Slide the bore gage up and down throughout the length of the cylinder bore. Check the bore both parallel and perpendicular to the centerline of the crankshaft at the top, center, and bottom of the bore.
A 6.0L cylinder bore that measures 101.618-101.636 mm (4.0007-4.0014 in) may be honed and serviced with a standard size piston.
A cylinder bore that exceeds the maximum diameter must be serviced with an oversized piston.