TM 10-3930-653-14&P (3) CHECKING ENGINE OIL FOR LEAKS Check   cylinder   head.      front   chain   cover,   oil   pan, rocker cover, oil filter gasket, etc.  or other parts for sign of   leaks   past   their   gasketed   surfaces.      If   necessary, replace  gaskets  or  damaged  parts.    After  maintenance has been done, check the replaced parts for any leaks. (4) CHANGING ENGINE COOLANT Scale   or   sediment   accumulated   in   water   jacket   or radiator   harms   heat   radiation.      Thoroughly   flush   the system  after  opening  the  two  drain  plugs,  (one  at  the bottom  of  the  radiator  and  the  other  at  the  right  side  of the cylinder block), until clean water comes out. Always use clean soft water in the radiator.  When the cold   season   arrives.      the   cooling   system   should   be protected against freezing by a good anti-freeze solution such as TCM LONG LIFE COOLANT. To   allow   for   expansion   when   hot   the   level,   (when cold) should be visible Just below the filler neck.  Do not overfill   the   system.      This   coolant   (L   L.C.)   should   be changed every recommended interval. (5) CHANGING ENGINE COOLANT  (L.L.C.) L  L.C.  is  an  ethylene  glycol  base  product  containing chemical  inhibitors  to  protect  the  cooling  system  from rusting and corrosion.  The L.L.C.  does not contain any glycerine, ethyl or methyl alcohol.  It will not evaporate or boil  away  and  can  be  used  with  either  a  high  or  low temperature  thermostat.    It  flows  freely,  transfers  heat efficiently,  and  will  not  clog  the  passages  in  the  cooling system.      The   L.L.C.      must   not   be   mixed   with   other products.      This   coolant   can   be   used   throughout   the seasons of the year. Whenever any coolant is changed, the cooling system should  be  flushed  and  refilled  with  new  coolant.    Check the level. (6) CHECKING  COOLING  SYSTEM  HOSES  AND CONNECTIONS FOR LEAKS Check   cooling   system   hoses   and   fittings   for   loose connections  and  deterioration.    Retighten  or  replace  as necessary. (1) Inspection of radiator cap Apply   reference   pressure   [0.9   kg/cm2   (13   psi)]   to radiator  cap  by  means  of  a  cap  tester  to  see  if  it  is  in good condition.  Replace cap assembly if necessary. (2) Cooling system pressure test WARNING Do  not  remove  the  radiator  cap  abruptly  while  the engine   is   hot..   Turn   the   cap   a   little   to   the   left   to relieve the pressure in the radiator, then remove the cap.   Do   not   wear   gloves   when   removing   radiator cap, a clean thick cloth is recommended. With radiator cap removed, apply reference pressure 11.6 kg/cm’ (23 psi)l to the cooling system by means of a tester to check for leaks of the system components. Water capacity: 8.5 liters (9 US qt, 71/2 Imp qt) 4-1-3-6 CRANKCASE EMISSION CONTROL SYSTEM (1) DESCRIPTION This system is designed to send blow-by gases back to   the   combustion   chamber   for   reburning,   and   at   the same   time   to   send   filtered   air   into   the   crankcase   for ventilation.      Thus,   this   system   serves   to   prevent   the emission of blow-by gases into the atmosphere. 4 - 15