SAFARI

ENGINE 90 Fig. 13 Fig. 14 Fig. 15 Fig. 16 7 Check twist and bend of connecting rod by using new piston pin in small end bush. Measure twist and bend of connecting rod with a feeler gauge with respect to vertical face of connecting rod alignment gauge in vertical and horizontal planes and at a distance of 50 mm from the joining centres of small end and big end bosses. Fig. 14 & 15. 8 If necessary, straighten connecting rod in cold condition. 9 Check connecting rod big end parent bore. 10 If diameter of connecting rod big end parent bore is slightly more than maximum permissible limits, it is possible to reclaimconnecting rodprovidedthatwear is confined only to cap. Connecting rod can mating surfacemaybe slightly facedandparent bore finished ona connecting rodboringmachine.However,centre to centre distance between small end and big end bores should be strictly as specified. 11 If one or more connecting rods are to be replaced, ensure that the difference in weights of the connecting rods in one engine is within permissible limits. (Max. difference in weight 10 gm). 12 Fit newpair of connecting rodbearingshell according to size of crank pin, making sure that securing lugs of bearingshells areproperly seated ingroovesof parent bore of connecting rod and cap. Fig. 16. 13 Place bearing cap with bearing shell on connecting rod, tighten and torque fastening bolts (preferably use new bolts) with torque wrench to specified value. Fig. 17. 14 Measure connecting rod bearing bore with bore measuring gauge at three points as shown. Fig. 18.