Cylinder Block Assembly: Testing and Inspection

Block and Piston Inspection

1. Remove the piston from the engine block. Crankshaft and Piston Removal

2. Check the piston for distortion or cracks.

3. Measure the piston diameter at a point 16.0 mm (0.63 in.) from the bottom of the skirt.

Piston Diameter










4. Measure wear and taper in direction X and Y at three levels in each cylinder as shown.

Cylinder Bore Size





Bore Taper










5. Check the top of the engine block for warpage. Measure along the edges and across the center as shown.

Engine Block Warpage










6. Calculate the difference between cylinder bore diameter and piston diameter. If the clearance is near or exceeds the service limit, inspect the piston and cylinder bore for excessive wear.

Piston-to-Cylinder Bore Clearance