Install connecting rod bearing cap with bearing 19. shell on connecting rod. Tighten connecting rod bearing cap mtg. bolts to specified torque. Measure connecting rod bearing bore. Record 20. the readings in the format given in this manual. If connecting rod big end parent bore 21. dimension is maintained within specified limits, proper bearing bore dimension is automatically achieved. However, it must be physically measured and 22. confirmed. Measure pretension of connecting rod bearing shell with a feeler gauge after loosening connecting rod bearing cap mounting bolt on opposite side of bearing shell lug. PISTON AND PISTON RINGS 1. Remove piston rings from piston using ring expander. 2. Remove carbon deposits from piston. 3. Clean piston and piston rings thoroughly. 4. In case cylinder bore taper and ovality is within specified limit, then same piston and piston rings may be reused. 5. Examine pistons for cracks, scoring, other damages, like Ring groove wear, piston pin bore wear, spring clip groove wear/ damage etc. 6. In case any one of the piston has any defect, all the piston set should be replaced. 7. Examine piston rings for scoring, lateral clearance in piston ring groove and butt clearance in cylinder bore. NOTE Connecting rod bearing shells are precision • finished and should not be bored or scraped. Diesel Engine Ph-2 (CAFÉ) 161
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