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TM 10-3930-664-24 4-8.  CYLINDER HEAD ASSEMBLY (WITH VALVES) REPAIR This task covers: Disassembly, Cleaning, Inspection, Repair, and Assembly INITIAL SETUP: Tools and Test Equipment: Equipment Condition: General Mechanics Tool Kit (1, App.  E) Cylinder head assembly removed Nylon Brush (38, App.  E) (para.  3-8) Caliper Set, Outside (13, App.  E) Caliper, Inside (12, App.  E) Depth Gage (20, App.  E) Valve Grinding Kit (50, App.  E) Soft Head Hammer (23, App.  E) Materials / Parts: Lubricating Oil (16, App.  C) Crocus Cloth (6, App.  C) Valve Lapping Compound (30, App.  C) Valve Stem Seal, Item 7 (8 ea.) A.  DISASSEMBLY 1. Mark valves (1, 2) with a grease pencil to identify their position. 2. Compress  valve  spring  (3)  and  remove  collets (4) from cylinder head (5).  Release valve spring and remove retainer (6) and spring. 3. Remove valves (1, 2) and place in a labeled rack for identification. 4. Remove    valve    system    seals    (7)    from    valve guides and discard. B.  CLEANING 1. Ensure   all   gasket   material   is   Removed   from cylinder    head    assembly    and    cylinder    block mating surfaces. 2. Clean carbon from injector nozzle seats using a nylon brush. 4-10

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