NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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NMWR 9-2815-220 CYLINDER ASSEMBLY OVERHAUL—Continued 0012 00 Table 4. Overhaul Inspection Procedure for Engine Cylinder Head, Standard (OIP 10951221) (Item 1, Figure 14). QA NO. REF. CHARACTERISTIC INSP. REQUISITE REQ. LTR. METHOD 1 Cracks Visual None allowed 2 Scratches, nicks, gouges, or Visual None allowed burrs on contact surfaces and tang slots in camshaft bores 3 Missing fins (refer to Figure Visual Must not exceed 6.25 sq. in. total. 4) Also must not exceed 1.56 sq. in. in any four sq. in. area 4 Loose or missing inserts Visual None allowed 5 Loose, bent or cracked Visual None allowed studs 6 Loose or missing dowels Visual None allowed (cover to head) 7 Damaged threads Visual None allowed 8 Valve seat inserts – cracked, Visual None allowed loose, burned, eroded, worn, or pitted valve seat Exhaust valve seat angle Measure Dimension must be no less than 45°–00' or no greater than 45° –15’ Intake valve insert seat Measure Dimension must be no less than angle 75°-45’ or no greater than 75° -15’ 0012 00-21 Change 1