Repair Procedures: Inspection: Piston: Notes
- Clean piston.
- Using a gasket scraper, remove the carbon from the piston top.
- Using a groove cleaning tool or broken ring, clean the piston ring grooves.
- Using solvent and a brush, thoroughly clean the piston.
Information
Do not use a wire brush.
- Check the piston-to-cylinder clearance by calculating the difference between the cylinder bore inner diameter and the piston outer diameter.
Piston-to-cylinder clearance:
0.02 - 0.04 mm (0.0008 - 0.0016 in.)
- Using a cylinder bore gauge, measure the cylinder bore diameter at position in the thrust and axial direction.
Cylinder bore diameter:
81.00 - 81.03 mm (3.1890 - 3.1902 in.)
Information
Measure position points (from the top of the cylinder block): 30 mm (1.1811 in.)/60 mm (2.3622 in.)/90 mm (3.5433 in.)
- Measure the piston outside diameter at 35 mm (1.3780 in) from top land of the piston.
Piston outside diameter :
80.97 - 81.00 mm (3.1878 - 3.1890 in.)
- Using a cylinder bore gauge, measure the cylinder bore diameter at position in the thrust and axial direction.
- Select the piston matching with cylinder bore class.
Piston-to-cylinder clearance:
0.02 - 0.04 mm (0.0008 - 0.0016 in.)