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EM-132 < UNIT DISASSEMBLY AND ASSEMBLY > [VQ35HR] CYLINDER BLOCK • When any cylinder needs boring, all other cylinders must also be bored. time. 4. Hone cylinders to obtain the specified piston to cylinder bore clearance. 5. Measure finished cylinder bore for the out-of-round and taper. CRANKSHAFT MAIN JOURNAL DIAMETER • Measure the outer diameter of crankshaft main journals with a micrometer. • If out of the standard, measure the main bearing oil clearance. Then use undersize bearing. Refer to . CRANKSHAFT PIN JOURNAL DIAMETER • Measure the outer diameter of crankshaft pin journal with a micrometer (A). • If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing. Refer to . CRANKSHAFT OUT-OF-ROUND AND TAPER • Measure the dimensions at four different points as shown in the figure on each main journal and pin journal with a micrometer. • Out-of-round is indicated by the difference in the dimensions between (d) and (c) at (a) and (b). • Taper is indicated by the difference in the dimensions between. • If the measured value exceeds the limit, correct or replace crank- shaft. • If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then select the main bearing and/ and/ EM-137, "Connecting Rod Bearing" . CRANKSHAFT RUNOUT • Place V-block on precise flat table, and support the journals on the both end of crankshaft. • Place a dial indicator straight up on the No. 3 journal. dial indicator. (Total indicator reading) • If it exceeds the limit, replace crankshaft. CONNECTING ROD BEARING OIL CLEARANCE Method by Calculation Standard : Refer to Standard : Refer to JPBIA0228ZZ Limit : Refer to JPBIA0229ZZ Standard and limit : Refer to . SEM346D |