TM-9-2815-237-34 HMMWV Engine Direct Support & General Support Maintenance Manual Download
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TM 9-2815-237-34 2-21. CYLINDER HEAD AND VALVE REPAIR This task covers: a. Disassembly d. Refacing Valves b. Cleaning e. Grinding Valve Seats c. Inspection f. Assembly INITIAL SETUP Tools General mechanic’s tool kit: automotive (Appendix E, Item 1) Valve spring compressor (Appendix E, Item 22) Bench grinder (Appendix E, Item 23) Rotary wheel wire brush (Appendix E, Item 24) Electric drill (Appendix E, Item 25) Rotary end wire brush (Appendix E, Item 26) Valve spring tester (Appendix E, Item 27) Straightedge (Appendix E, Item 15) Feeler gauge (Appendix E, Item 13) Dial indicator (Appendix E, Item 10) Valve face grinding machine (Appendix E, Item 28) Valve seat grinding kit (Appendix E, Item 29) Materials/Parts Sixteen valve seals (Appendix D, Item 47) Water jacket cover gasket (Appendix D, Item 20) Lubricating oil OE/HDO (Appendix B, Item 13) Pipe sealing compound (Appendix B, Item 17) Manual References TM 9-2815-237-34P Equipment Condition Engine disassembled into subassemblies (para. 2-15). NOTE The cylinder head and valve repair procedures for 6.5L engines, 1990 and above 6.2L engines and previous model engines are basically the same. Any differences in procedures are noted. Refer to engine decal model number on left rocker arm cover before ordering replacement parts. a. Disassembly 1. 2. 3. 4, 5. 6. 7. 2-62 Using valve spring compressor, compress intake valve spring (3) and remove valve keys (7). Release valve spring compressor slowly. Remove valve cap (6), shield (4), valve spring (3), valve spring shim (2), and valve seal (5) from intake valve (16). Discard valve seal (5). NOTE Valves must be installed in the same location they were removed from. As each valve is removed, place on numbered board or stand. Remove intake valve (16) from cylinder head (1). Repeat steps 1 through 3 for remaining intake valves. Using valve spring compressor, compress exhaust valve spring (13) and remove valve keys (8). Release valve spring compressor slowly. NOTE ● Valve caps on exhaust valves are rotaters. ● Perform step 6 for 6.5L and 1990 and above 6.2L engines only. 6.5L engine has another seal as indicated in step 6. Remove valve cap (9), shield (11), valve stem seal (12), valve spring (13), valve spring shim (14), seal (17), and valve seal (10) from exhaust valve (15). Discard valve seal (10). Remove valve cap (9), shield (11), valve spring (13), valve spring shim (14), and valve seal (10) from exhaust valve (15). Discard valve seal (10).