The inspection process for the piston/connecting rod assemblies should start by cleaning them and removing the original piston rings from the pistons, then replacing them with new piston rings during engine reassembly. With care to avoid damaging the piston surfaces, pull out the rings using a piston ring installation tool. By scraping or using a handheld wire brush or fine emery cloth, eliminate carbon deposits from the piston crown. Avoid electric drills with wire brushes as these can eat away at the soft material of the piston. Use a piece from an old ring or a piston ring groove cleaning tool to get rid of carbon deposits from the ring grooves without removing any metal or causing scratches. Consequently, solvent-wash and blow off each of them if possible in order that oil return holes are not clogged on their back sides within ring grooves. Also, check for cracks around skirt, pin bosses and ring lands or overheating/abnormal combustion scoring, scuffing, holes or burned areas in thrust faces, crown and edge which need addressing if found. If there is corrosion with small pits it may indicate coolant leakage; this must be sorted out. Piston to bore clearance; measure clearances on one side of the compressor guard ensuring perfect match so as to check out for proper fitting: plus evaluate piston-to-rod clearance seeking help of automotive machine shop for reboring and new pin installation whenever necessary. In case it becomes necessary to separate pistons from connecting rods, professional assistance must be sought in order not to disassemble pistons and connecting rods also. Finally, check connection rod for cracks/damages, remove rod caps temporarily to inspect bearing surfaces and replace old bearings before tightening nuts finger tight.