Operation CHARM: Car repair manuals for everyone.

Cylinder Block Assembly: Testing and Inspection




Block and Piston Inspection

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

2. Check the pistons for distortion or cracks.

3. Measure the piston skirt diameter (A) at a point 13 mm (0.51 in) from the bottom of the skirt.














4. Measure the wear and taper in direction X and Y at three levels in each cylinder as shown. If measurements in any cylinder are beyond the oversize bore service Limit, replace the engine block. If the engine block is to be rebored, refer to step 7 Testing and Inspection after reboring.

























5. Hone any scored or scratched cylinder bores Procedures.

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














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