TM  10-3930-638-24&P 4-2.   ENGINE   MAINTENANCE   (cont) b. Cylinder Head and Valves (cont). STEP LOCATION ITEM ACTION REMARKS INSPECTION AND REPAIR (cont) NOTE (cont) If valve seat inserts (14) require replacement perform steps b and c below; otherwise proceed to step d below. CAUTION Don’t remove valve seat inserts (14) with punch, chisel or pry bar as damage to cylinder head will result. b. Valve seat Remove Use seat removal tool or machine inserts insert (14) out of cylinder head c. Valve seat Cool  and Clean valve seat insert recesses in cylinder insert (14) install head. Place new inserts in dry ice to shrink them, then install by pressing into cylinder block until bottomed in recess d.  Intake  valve Install  and Check as shown below. If protrusion is (7)  and  exhaust check valve more than 0.005 inch, valve and seat must valve  (6) protrusion be ground. Refer to intake and exhaust valves and valve seat refacing following 4-15