How to Select Piston and Bearing

DESCRIPTION





*For the service parts, the grade for fitting cannot be selected between a piston pin and a connecting rod. (Only 0 grade is available.) The information at the shipment from the plant is described as a reference.
^ The identification grade stamped on each part is the grade for the dimension measured in new condition. This grade cannot apply to reused parts.
^ For reused or repaired parts, measure the dimension accurately Determine the grade by comparing the measurement with the values of each selection table.
^ For details of the measurement method of each part, the reuse standards, and the selection method of the selective fitting parts, follow the applicable procedures.

HOW TO SELECT A PISTON

When New Cylinder Block is Used:





^ Check the cylinder bore grade on rear left side of cylinder block, and select a piston of the same grade.
^ If there is a corrected stamp mark on the cylinder block, use it as a correct reference.





A: Front mark
B: Piston pin bore grade
C: Piston grade I.D. stamp
D: Piston crown I.D. code stamp

When a Cylinder Block is Reused:
1. Measure the cylinder block bore inner diameter.
2. Determine the bore grade by comparing the measurement with the values under the cylinder bore inner diameter of the "Piston Selection Table". Select the piston of the same grade.





NOTE:
^ The piston is available together with piston pin as an assembly
^ The piston pin (piston pin bore) grade is provided only for the parts installed at the plant. For service parts, no grades can be selected. Only 0 grade is available.