Measuring the Cylinder for Taper, Out-of-Round, and Oversize
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Adjust the micrometer to 99.0 mm (3.897 in).
- Insert the J 8087 into the micrometer and zero the bore gauge dial.
- Use a bore gage and measure the cylinder bore for taper, out-of-round, and oversize.
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.
A cylinder that measures 99.0-99.018 mm (3.897-3.898 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.