Inspection

Block and Piston Inspection

Inspection

1. Block and Piston - Inspection

1. Remove the pistons from the engine block. Check the pistons for distortion or cracks.
Measure the piston diameter at a point 13 mm (0.51 in) from the bottom of the skirt. There are two standard-size pistons (No Letter or A, and B). The letter is stamped on the top of the piston. Letters are also stamped on the engine block as the cylinder bore sizes.






























2. Measure the wear and taper in direction X and Y at three levels in each cylinder as shown. If the measurements in any cylinder are beyond the Oversize Bore Service Limit, replace the engine block. If the engine block is being rebored, check the piston-to-cylinder bore clearance.







































3. Hone any cored or scratched cylinder bores if needed.