TM  10-3930-638-24&P 3-5.   ENGINE   MAINTENANCE   (cont) g.  Cylinder  Head  (cont). STEP LOCATION ITEM ACTION REMARKS REMOVAL 1 Cylinder  head a. Two stud nuts (1) Loosen  and (4) top remove b. 17 bolts (2) Loosen  and remove c. 19 washers (3) Remove d. Cylinder head (4) Remove e. Gasket (5) Remove  and discard f. Two studs (6) Remove  from nut (1) lNSPECTION/REPAIR 2 Nuts (1), bolts (2), Inspect washers (3) and studs (6) 3 Pistons Inspect 4 Cylinder  block  sleeves Inspect 5 Cylinder  block  top  surface  Inspect  and measure 6 Cylinder  head  (4) Inspect 7 Cylinder head bottom Check  warpage surface Remove nut (1) and stud (6) as an assembly From cylinder head (4) Lift from engine block Clean all gasket residue from cylinder head  and  engine  block Remove only if required for replacement Replace if worn, or if threads damaged Replace  if  cracked,  damaged,  scored,  and clean  carbon  deposits  (notify  general support  maintenance) Check  taper  and  out-of-roundness  with bore gage. Replace sleeves if taper is more than 0.002 inch or if out-of- roundness is more than 0.001 inch (notify general  support  maintenance) Measure top surface using straight edge and feeler gage. Replace block if top surface varies more than 0.002 inch, or if block is cracked, damaged or eroded (notify  general  support  maintenance) Replace  if  expansion  plugs  eroded,  head cracked, or valves burned or damaged Lay  straight  edge  diagonally  from  corner to corner and try to get a 0.006 inch feeler gage under straight edge. Check at several points.  Reposition  straight  edge  at opposite  corners  and  repeat  checks. Resurface cylinder head if warpage exceeds 0.006 inch (notify general support  maintenance) 3-54