TM 10-3930-669-20 CHAPTER 3 ENGINE MAINTENANCE Para Contents Page 3-1 Introduction........................................................................................................................................... 3-1 3-2 Valve Covers Replacement .................................................................................................................. 3-2 3-3 Valve Overlap Determination................................................................................................................ 3-4 3-4 Rocker Arm Adjustment........................................................................................................................ 3-8 3-5 Engine Oil Filter Adapter Assembly Replacement/Repair...................................................................... 3-11 3-6 Engine Oil and Filter Replacement ....................................................................................................... 3-23 3-7 Engine Oil Cooler Replacement............................................................................................................ 3-28 3-8 Engine Oil Breather Replacement......................................................................................................... 3-30 3-9 Engine AOAP Valve Replacement........................................................................................................ 3-32 3-1.  INTRODUCTION. This   chapter   contains   maintenance   instructions   for   removing,   replacing,   repairing,   installing   and   adjusting   engine components authorized by the Maintenance Allocation Chart (MAC) at the Unit Maintenance level. 3-1

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