NANO

ENGINE 273 MPFI 131 ENGINE Connecting Rod Big End Clearance Check connecting rod big end parent bore dimension If connecting rod big end parent bore is slightly more than maximum permissible limits, it is possible to reclaim connecting rod provided the wear is confined only to connecting rod bearing cap. Connecting rod bearing cap mating surface may be slightly faced. Parent bore should then be finished on a connecting rod boring machine. Ensure that connecting rod big end and small end axes are parallel to each other within specified limits. Centre to centre distance between connecting rod small end and big end is maintained within specified limits. If one or more connecting rods are to be replaced, ensure that difference in weight of connecting rod in one engine is within permissible limits. Install new pair of connecting rod bearing shell ac- cording to size of crank pin journal diameter, making sure that securing lugs of bearing shells are properly seated in grooves of connecting rod and its bearing cap. Install connecting rod bearing cap with bearing shell on connecting rod. Tighten connecting rod bearing cap mtg. nuts to specified torque. Measure connecting rod bearing bore. If connecting rod big end parent bore dimension is maintained within specified limits, proper bearing bore dimension is automatically achieved. Connecting rod bearing shells are precision finished and should not be bored or scraped.