TM 5-3805-262-34INSPECTION (SHEET 1 OF 3)NOTEOver size pistons (18) and ring sets (13 thru 15) are available in 0.010inch and 0.020 inch oversize. Oversize inserts (10) are also availablein 0.010 inch, 0.020 inch, and 0.030 inch oversize.(a) Inspect cylinder block (2) for cracks and rough bores. If cracks areseen, replace cylinder block. If bores are rough, hone bores to nextlargest diameter listed below using cylinder wall hone and drill orinstall new cylinder block.Standard bore diameter1.9995 to 2.0000 inches0.010 inch oversize diameter2.0095 to 2.0100 inches0.020 inch oversize diameter2.0195 to 2.0200 inchesNOTEIf cylinder block (2) bores are honedto next oversize diameter, installoversize pistons (18) and ring sets(13 thru 15).(b) Measure diameter of each bore incylinder block (2) near top ofeach bore at a 90 degree angle towrist pin (17) using bore gage andmicrometer. Record measurement.Then make three more measurementsdown length of bores. If differ-ence between any measurement ismore than 0.001 inch, there is toomuch taper in bore. Increase diam-eter of bore to next larger diam-eter listed above or install new cylinder block.(c)(d)Measure diameter of each bore in cylinder block (2) near top of bore infour different places using bore gage and micrometer. If differencebetween any measurement is more than 0.005 inch, bore is out of round.Increase diameter of bore to next larger diameter listed above or in-stall a new cylinder block.Measure diameter of wrist pinbore in connecting rods (12)using bore gage and microm-eter. If measurement is morethan 0.5004 inch, a new con-necting rod must be installed.3-483
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