45 ENGINE2.2LDICOR Inspectionof cylinder block sub-assemblies Fig. 95 CONNECTINGRODS l Inspect connecting rod small end bush and if necessary, replace it. l Check connecting rod small end parent bore dimension (Fig. 95) l If necessary machine connecting rod small end parent bore to next over size. ENSURETHATCONNECTINGRODBIGENDANDSMALL ENDAXESAREPARALLELTOEACHOTHERANDARE WITHINSPECIFIEDLIMITS. ENSURETHATCENTRE DISTANCE BETWEEN SMALL END TO BIG END IS MAINTAINEDWITHINSPECIFIEDLIMIT. Smear oil on parent bore of connecting rod. Install new bush in such a way that slits are symmetrically positioned at approximately in vertical axis. Machine the side faces of bush to match the taper faces of connecting rod. Drill oil hole in new bush. Finish connecting rod small end bush bore on a connecting rod boring machine. Alternately connecting rod small end bush may be reamed. The end edges to be chamfered/deburred manually. Install connecting rod bearing caps without bearing shells on connecting rod. Tighten connecting rod bearing cap mounting nuts to specified torque (Fig 96) ENSURE THAT IDENTIFICATION NUMBERS FOR CONNECTING ROD AND CONNECTING ROD BEARINGCAPAREMATCHEDANDNOTCHESFOR BEARINGSHELLSAREONTHESAMESIDE. l Check twist and bend of connecting rod by using new piston pin in connecting rod small end bush. l Measure twist and bend of connecting rod with feeler gauge with respect to vertical face of connecting rod alignment gauge in vertical and horizontal plane at a distance of 50 mm from line joining centers of connecting rod small end and big end bosses.(Fig 97 & 98) Fig 96 Fig 97
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