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must be removed from top of cylinder block. When removing piston and connecting rod assemblies from the CAUTION: DO NOT use a number stamp or a punch to mark connecting rods or caps, as damage to con- NOTE: Connecting rods and bearing caps are not interchangeable and should be marked before removing 4. Mark connecting rod and bearing cap positions using a permanent ink marker or scribe tool. CAUTION: Care must be taken not to damage the 5. Remove connecting rod cap. Install Special Tool 8507 Connecting Rod Guides into the connecting rod being removed. Remove piston from cylinder bore. Repeat this procedure for each piston being removed. CAUTION: Care must be taken not to nick crankshaft journals, as engine damage may occur 6. Immediately after piston and connecting rod removal, install bearing cap on the mating connecting rod to prevent damage to the fractured cap and rod surfaces. 7. Carefully remove piston rings from piston(s), starting from the top ring down. CLEANING CAUTION: DO NOT use a wire wheel or other abrasive cleaning devise to clean the pistons or connecting 1. Using a suitable cleaning solvent clean the pistons in warm water and towel dry. 2. Use a wood or plastic scraper to clean the ring land grooves. CAUTION: DO NOT remove the piston pin from the piston and connecting rod assembly. INSPECTION Check the connecting rod journal for excessive wear, taper and scoring (Refer to 9 - ENGINE/ENGINE BLOCK/ Check the connecting rod for signs of twist or bending. Check the piston for taper and elliptical shape before it is fitted into the cylinder bore (Refer to 9 - ENGINE/ENGINE Check the piston for scoring, or scraping marks in the piston skirts. Check the ring lands for cracks and/or 9 - 2238 ENGINE - 4.7L - SERVICE INFORMATION DR/DH |