TM  10-3930-643-34 ENGINE,  FUEL,  EXHAUST  AND  COOLING  TROUBLESHOOTING  AND 4-4. Cylinder Head Assembly with Valves. (Sheet 8 of DISASSEMBLY/CLEANING/INSPECTION   (cont) 21. 22. 23. 24. 25. 26. Place  six  new  sleeves  (15)  in cylinder bores and position installing  tool. Keep  tool  centered and tap squarely with brass hammer until six sleeves (15) are bottomed in  bores. Inspect 12 coolant directors (16). Replace if loose or restricted. If required,  coolant  directors  (16)  may be removed using a slide hammer with a small enough jaw to hook under coolant  directors  (16)  opening. Install  new  coolant  directors (16), as shown, if removed, by tapping into place with a small hammer and block. Recess  0.06  inches  below  bottom  deck of cylinder head (6). Aim 12 new coolant directors (16), as shown. Inspect  six  exhaust  valves-small  head (13) and intake valves-large head (14) for excessive wear, burn marks, warpage,  pitting  or  scuffing  at  valve stem grooves, valve stems and heads. Replace if bent, worn, burned, warped, pitted or scuffed. Measure valve stem diameter in two places, as shown. Valve  stem  should be 0.3718 inches. If stem is undersize, NOTE more than 0.001 inches replace valve. MAINTENANCE.  (cont) 18) Go to sheet 9 4-36

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