ARMY TM 9-2815-259-24 AIR FORCE TO 38G1-125-2 MARINE CORPS 09249A/09246A-24 5-71 CAUTION Cap screws and washers must be tightened to correct specification to achieve an accurate reading when checking liner standout (height above block), as detailed later in this paragraph. (5) Use short capscrews (1, Figure 5-70) and 1/8 in. (3 mm) thick washers (2) to bolt down cylinder liners (3).  Fasten each liner in two locations.  Tighten capscrews to 50 lb-ft (68 Nm). FIGURE 5-70.  FASTENING CYLINDER LINERS. NOTE Do not rotate crankshaft with cylinder head removed unless liners are fastened down. (6) Remove carbon from liner bore using scraper or ridge reamer, refer to Figure 5-71.  Rotate crankshaft as required to allow clearance for scraper or ridge reamer.  Use compressed air to remove loose material. FIGURE 5-71.  REMOVING CARBON FROM CYLINDER LINER.