1999 Volvo Penta "WT" Models Workshop Manual, Page 237Get this manual
4Subtract the piston diameter from the cylinder bore diameter in order to determine the piston-to-bore clearance5Determine if the piston-to-bore clearance is within the acceptable rangeRefer to Specifications found elsewhere in this section6If the used piston is not acceptable, determine if new piston will fit the cylinder bore7If the new piston will not bring the clearance within tolerances, the cylinder must be reconditionedRefer to Cylinder Boring and Honing found in the General Engine Mechanical section in this manual8Mark the piston to identify the cylinder for which it was fitted Engine Front CoverClean and Inspect