Diameter Check/Fitting

NOTE: Measure the piston outer diameter at a right angle (90 degrees) to the piston pin and below the oil ring groove.





1. Measure the outer diameter of each piston.
Coded Grade 1: 82.390-82.410 mm (3.2436-3.2444 inch).
Coded Grade 2: 82.398-82.422 mm (3.2440-3.2449 inch).
Coded Grade 3: 82.410-82.430 mm (3.2444-3.2452 inch).

2. Measure the cylinder block piston bores 13 mm (1/2 inch) below the top of the deck.
3. Measure the cylinder block piston bores 13 mm (1/2 inch) above top of piston with piston at its lowest pint of travel in the cylinder block bore.
Grade 1: 82.400-82.410 mm.
Grade 2: 82.411-82.421 mm.
Grade 3: 82.420-82.430 mm.
4. The difference between the two is the piston to cylinder bore clearance.
Clearance Limit: 0.012 to 0.022 mm (0.0005-0.0009 inch).
5. Select a piston to keep clearance within range.