TM 9-4310-397-146-10. CONNECTING ROD, PISTONS, RINGS, AND LINERS AND CYLINDER BLOCK INSPECTION ANDREPAIR.-Continued4Use a feeler gauge to measure distance (F) between piston skirt and liner at 90° to piston pin bore.Record the measured distance (F).5Turn piston 90° in liner. Use a feeler gauge to measure distance between piston skirt and liner 90°to piston pin bore. Record the measured distance. The difference between the two measurementsteps (3) and (5) is the distance the liner is out of round at the top of the liner.6If liner is out of round more than 0.002 in. (0.05 mm) at top or bottom, install a new one.7Find difference between distance measured in Step (1) and distance measured in Step (3). This isthe distance the liner is tapered.8If liner is tapered more than 0.002 in. (0.05 mm) install a new one.(i) Deglaze cylinder liners.1Secure cylinder liner in a holding fixture.2Use Flex-Hone (item 25, section III, appendix B) to deglaze cylinder liner.NOTEUse honing lubricating oil (item 10, section II, appendix E) along with flex honewhen deglazing liners.(3)Inspect and measure connecting rod bearings.NOTENever use new connecting rod cap screws when checking rod bearing ID. Usenew cap screws only for final assembly of connecting rods.(a)Rod bearing-to-journal oil clearance can be checked with bearing clearance gauge (items 21, 22, and 23,section II, appendix E) (Plastigage) if rod is connected to crankshaft. If rod is out of engine, measure IDof connecting rod bearings and compare with OD of crankshaft journal.NOTERemember, the use of bearing clearance gauge (Plastigage) will determine bearingjournal clearance, but will not indicate the condition of either surface.(b)With crankshaft removed, measure connecting rod journal OD at several points.(c)Install connecting rod cap on rod with bearings.(d)Install rod cap screws and tighten to 55 ft-lb (75 Nm).(e)Using an inside micrometer measure ID of bearing.(f)Subtract OD of crankshaft journals from ID of rod bearings to obtain oil clearance.6-68
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