TM 1-1500-204-23-1 (9)  Use following procedure as alternate method of exhaust sealing. (a)  Remove exhaust stacks at cylinder outlet. (b)    Install  cylinder  exhaust  outlet  cover  between exhaust stack opening and exhaust stack flange. NOTE Engines with Individual exhaust stacks   have   stacks   removed   and   a cylinder exhaust outlet cover installed between exhaust stack flange and cylinder exhaust outlet. (c)  Fabricate covers locally. (10)  Seal all openings such as distributor vents and engine  breathers  with  moisture  proof  plugs  and  covers Pressure  sensitive  tape,  Federal  Specification  PPP-T- 60, (red) may be used (11)    Cover  all  engines  installed  on  aircraft  using engine   covers   furnished   with   aircraft.      Provide   lower portion     of     cover     with     a     drain     hole     to     prevent accumulations of water. (12)      Locally   fabricate   placard   for   engines   with propellers  installed,  and  conspicuously  display  placard on    propeller    blade.        Placard    shall    have    following information DO NOT TURN PROPELLER ENGINE PRESERVED IN ACCORDANCE WITH APPLICABLE MAINTENANCE INSTRUCTIONS e.  Flyable Storage.  Engine installed on aircraft which will not be flown for an Indefinite period of time, but are maintained  in  a  flyable  status  or  undergoing  short-term maintenance, shall be treated as follows: (1)    Engine  serviced  with  normal  lubricant  shall  be given a ground runup each third day of Idleness. NOTE The runup consists of engine operation at a speed greater than idle for   a   period   of   5   minutes   or   until highest allowable oil inlet temperature   is   attained.      Every   14 days    a    15-minute    normal    ground preflight shall be accomplished. (2)     Engines  undergoing  repair  or  inspection  that cannot  be  operated  shall  be  pulled  through  by  hand  or starter   at   least   eight   revolutions   on   the   third   day   of idleness. NOTE Aground runup shall be accomplished  on  the  seventh  day  of idleness.      When   runup   cannot   be accomplished   on   the   seventh   day, the crankshaft shall be pulled through   and   cylinders   sprayed   as outlined in paragraph 7-11b.  Storage of   aircraft   engines   in   this   manner shall not exceed 14 days. (3)  Upon conclusion of a ground runup on engines In flyable storage, make entries on applicable DA Forms 2408-13. NOTE Check the applicable aircraft maintenance     manual     for     specific instruction pertaining to Flyable Storage. 7-13.      Depreservatlon   of   Reciprocating   Engines. The    instructions    contained    In    this    section    shall    be followed prior to making the initial start to newly installed engines and engines installed in aircraft being removed from   temporary   and   Indefinite   storage,   regardless   of time In storage. NOTE Newly    installed    engines    shall    be given  a  depreservation  run  as  soon as   possible,   but   not   later   than   4 hours after preoiling has been accomplished.  If more than 4 hours has  elapsed  since  preoiling  engine, complete   preoiling   procedure   shall again be accomplished. a.  Preoiling.  Proper preoiling lubricates internal gears and bearings, expels air from internal oil passages, and averts internal engine failures due to lack of lubrication. Accomplish    preoiling    either    indoors    or    by    applying engine   preheat   prior   to   preoiling   when   operating   in temperature  below  0°F  (-18 °C).    For  preoiling  engines on aircraft using the diverter-segregator oil system, it is necessary   to   follow   special   instructions   contained   in applicable  aircraft  maintenance  manual.    Preoil  using the following procedures: 7-44