Piston: Testing and Inspection

1. Check the piston for distortion or cracks.

NOTE: If a cylinder is bored, an oversized piston must be used.





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

Piston Diameter:
Standard (New): 85.975 - 85.985 mm (3.3848 - 3.3852 inch)
Service Limit: 85.965 mm (3.3844 inch)





3. Calculate the difference between the cylinder bore diameter (as shown) and piston diameter.

Piston-to-Block Clearance:
Standard (New): 0.015 - 0.040 mm (0.0006 - 0.0016 inch)
Service Limit: 0.08 mm (0.003 inch)

Oversize Piston Diameter:
0.25: 86.225 - 86.235 mm (3.3947 - 3.3951 inch)
0.50: 86.475 - 86.485 mm (3.4045 - 3.4049 inch)