Block and Piston: Inspection
- Piston - Remove
- Crankshaft - Remove
- Block and Piston - Inspect
1. Check the pistons for distortion or cracks. 2. Measure the piston skirt diameter at a point 16 mm (0.63 in) from the bottom of the skirt.
Piston Skirt Diameter 0.25: 89.225-89.235 mm (3.51279-3.51318 in) Oversize Piston Skirt Diameter Standard (New): 88.975-88.985 mm (3.50295-3.50334 in) Service Limit: 88.965 mm (3.50255 in) 3. 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 or the cylinders are damaged, replace the engine block. If the engine block has to be rebored, refer to step 6 after reboring.
Cylinder Bore Size Standard (New): 89.000-89.015 mm (3.50393-3.50452 in) Service Limit: 89.065 mm (3.50649 in) Oversize 0.25: 89.250-89.265 mm (3.51377-3.51436 in) Reboring Limit: 0.25 mm (0.0098 in) Bore Taper Limit: (Difference between first and third measurement) 0.25 mm (0.0098 in) 4. Hone any scored or scratched cylinder bores .
5. Check the top of the engine block for warpage. Measure along the edges and across the center as shown.
Engine Block Warpage Standard (New): 0.07 mm (0.0028 in) max. 6. 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. Piston - to - Cylinder Bore Clearance Standard (New): 0.015-0.040 mm (0.00059-0.00157 in) Service Limit: 0.08 mm (0.0031 in) - Crankshaft - Install
- Piston - Install