ARMY TM 9-6115-670-14&P6-12 6.7. VALVES. This task covers: a. Test b. Adjust c. Replace INITIAL SETUP ToolsShop Equipment, Electrical, Repair, Semitrailer Mounted (Item 3, Appendix B) Valve Spring Lifter (Item 38, Appendix B) Outside Micrometer Caliper (Item 43, Appendix B) Small Hole Gauge (Item 5, Appendix B) Gloves, Chemical and Oil Protective (Item 34, Appendix B) EquipmentConditionsCylinder head removed (para 6.5.). Materials/PartsLubricating Oil(Items 10-13, Appendix F) Valve Lapping Compound (Item 24, Appendix F) Red Lead (Item 14, Appendix F) TEST a. Remove and disassemble valve (perform steps a - e of REPLACE). b. Remove carbon from valve guide. c. Measure valve stem OD with an outside micrometer caliper. Refer to Figure 6-4, Sheet 1) for measurement locations. The OD should be between 0.23496 and 0.23543 in. (5.968 and 5.980 mm). d. Measure valve guide ID with a small hole gauge. ID should be between 0.23661 and 0.23720 in. (6.010 and 6.025 mm). e. Calculate oil clearance (refer to Figure 6-4). Clearance should be between 0.00118 and 0.00224 in. (0.030 and 0.057 mm) with an allowable limit of 0.0039 in. (0.10 mm). If clearance exceeds allowable limit, replace valve and valve guide (para 6.8.) (Figure 6-4) (Sheet 1).
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