OPERATING AND MAINTENANCE—C.4 hose   clips   where   necessary   and   inspect   header tank water level. 9. Check water pump belt for tension. 10. Carry   out   test   to   check   general   performance   of engine. 11. Check engine mounting bolts for tightness. Thereafter maintenance periods should be in accordance with the instructions given on this page. It   is   assumed   that   electrical   equipment   will   have already been checked for such points as dynamo rate of charge, effectiveness of connections and circuits, etc. PROTECTION OF AN ENGINE NOT IN SERVICE The  recommendations  given  below  are  to  ensure  that damage  is  prevented  when  an  engine  is  removed  from service  for  an  extended  period.    Use  these  procedures immediately  the  engine  is  removed  from  service.    The instructions  for  the  use  of  POWERPART  products  are given on the outside of each container. 1. Thoroughly clean the outside of the engine. 2. Where  a  preservative  fuel  is  to  be  used.    drain  the fuel   system   and   till   with   the   preservative   fuel. POWERPART   Lay-Up   1   can   be   added   to   the normal  fuel  to  change  it  to  a  preservative  fuel.    If preservative  fuel  is  not  used,  the  system  can  be kept  charged  with  normal  fuel,  but  this  will  have  to be drained and discarded at the end of the storage period together with the fuel filter element. 3. Run  the  engine  until  it  is  warm.    Correct  any  fuel, lubricating  oil  or  air  leakage.    Stop  the  engine  and drain the lubricating oil sump. 4. Renew the lubricating oil filter canister or element. 5. Fill  the  sump  to  the  full  mark  on  the  dipstick  with clean     new     lubricating     oil     or     with     a     correct preservative fluid.   POWERPART Lay-Up 2 can be added    to    the    lubricating    oil    to    give    protection against corrosion during the period in storage.  If a preservative fluid is used, this must be drained and normal lubricating  oil  used  when  the  engine  is  returned  to service. 6. Drain  the  cooling  system,  see  Page  C.5.    To  give protection  against  corrosion,  it  is  better  to  fill  the cooling  system  with  a  coolant  that  has  a  corrosion inhibitor.      If   frost   protection   is   needed,   use   an antifreeze mixture.  If no frost protection is needed, use   water   with   an   approved   corrosion   inhibitor mixture. 7. Run   the   engine   for   a   short   period   to   send   the lubricating oil and coolant around the engine. 8. Remove  the  atomisers  and   spray   POWERPART Lay-Up  2  into  each  cylinder  bore.    If  this  is  not available,   clean   engine   lubricating   oil   will   give   a degree of protection.  Spray into the cylinder bores 140  ml  (1/4  pint)  of  lubricating  oil  divided  evenly between the four cylinders. 9. Slowly  turn  the  crankshaft  one  revolution  and  then install    the    atomisers    complete    with    new    seat washers. 10. Remove   the   air   filter   and    spray   POWERPART Lay-Up 2  into  the  induction  manifold.    Replace  air filter and seal with waterproof tape. 11. Remove   the   exhaust   pipe   Spray   POWERPART Lay-Up   2   into   the   exhaust   manifold.      Seal   the manifold with waterproof tape. 12. Remove    the    lubricating    oil    filler    cap.        Spray POWERPART  Lay-Up  2  around  the  rocker  shaft assembly.  Fit the filler cap. 13. Disconnect  the  battery  and  put  it  into  safe  storage in  a  fully  charged  condition.    Before  the  battery  is put     into     storage,     give     the     battery     terminals protection  against  corrosion.    POWERPART  Lay- Up 3 can be used on the terminals. 14. Seal  the  vent  pipe  of  the  fuel  tank  or  the  fuel  filler cap with waterproof tape. 15. Remove end plate from sea water circulating pump and lubricate the interior with glycerine or MARFAK 2HD  grease, or remove the impeller for the lay-up period.      Always   use   a   new   joint   when   refitting backplate. 16. Remove the drive belt and put into storage.