56 4 DLT ENGINE Check connecting rod big end parent bore dimension. Refer Figure 98 If connecting rod big end parent bore is slightly more than maximum permissible limits, it is possible to reclaim 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 AXIS ARE PARALLEL TO EACH OTHER WITHIN SPECIFIED LIMITS. CENTER TO CENTER 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 according 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 . Refer Figure 99. Install connecting rod bearing cap with bearing shell on connecting rod. Tighten connecting rod bearing cap mounting nuts to specified torque . Refer Figure 100. Fig. 98 Fig. 99 Fig. 100
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