Measuring Cylinder Bore Taper
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Measure the cylinder bore along the thrust surfaces (perpendicular to the crankshaft centerline) at 5 mm (0.20 in) below the deck surface and record your measurement.
- Measure the cylinder bore along the thrust surfaces (perpendicular to the crankshaft centerline) at 102 mm (4.00 in) below the deck surface and record your measurement.
- Calculate the difference between the two measurements. The result will be the cylinder taper.
- Compare your results with the Engine Mechanical Specifications . If the cylinders exceed the specifications, replace the cylinder block. There are no oversized pistons and rings available for service.