TM 10-3930-669-20 3-3.  VALVE OVERLAP DETERMINATION (CONT). NOTE Valve   overlapping   is   when   exhaust valve   is   about   to   close   and   inlet valve    is    about    to    open.        Both pushrods    will    not    rotate    at    this position. (2) As    described    in    Step    (1),    continue    turning engine    (2)    until    exhaust    valve    pushrod    (3) overlaps intake valve pushrod (4). (3) Repeat     Steps     (1)     and     (2)     for     remaining cylinders, as required. c. Installation. NOTE All   valve   covers   are   installed   the same   way.      Valve   cover   No.      1   is shown. (1) Install  four  gaskets  (14)  and  valve  covers  (13) on  engine  (15)  with  four  washers  (12),  washers (11), and screws (6).  Tighten screws 5 to 11 lb- ft (7-15 N•m). 3-6