9. Measure rod’s piston pin bore-to-crankshaft bore center-to-center dimension (A) and compare with specification given. If measurement is not within specification, replace rod. Specification Connecting Rod Centerline of Piston Pin Bore-to-Crankshaft Bore (New Part)—Dimension 263.95—264.05 mm (10.392—10.396 in.) .................................... A—Rod’s Piston Pin Bore-to-Crankshaft Bore Center-to-Center Dimension RG8420 –UN–09DEC97 Measuring Rod Center-to-Center Bores RG,RG34710,122 –19–02AUG99–4/4 CTM100 (06APR04) 02-030-33 P OWER T ECH 10.5 L & 12.5 L Diesel Engines 040604 PN=173 Cylinder Block, Liners, Pistons, and Rods 7.
Using an inside micrometer, measure rod bore at center of bore and record measurements as follows: • (A) At right angle to rod/cap joint. • (B) At 45 degrees left of measurement (A). • (C) At 45 degrees right of measurement (A). 8. Compare the measurements. Specification Connecting Rod Bore (For Crankshaft Journal Bearing)—ID.................................. 93.76—93.79 mm (3.6915—3.6925 in.) –UN–20NOV97 If difference between the greatest and least measurement is more than 0.038 mm (0.0015 in.), the rod and cap are out of round. Replace both connecting rod and cap. RG1549 Measuring Assembled Rod Bore RG,RG34710,122 –19–02AUG99–3/4 02 030 33