TIMING CASE AND DRIVE - K.4 tighten to a torque setting of 50 lbf ft 16.9 kgf m) -   68   Nm   and   secure   the   setscrew   with   the locking washer tab. 7. Refit    the    timing    front    case    front    cover    as previously detailed in this Section. 8. Tighten down the rocker assembly securing nuts and adjust the valve clearances to 0.012 in (0,30 mm) cold. To Remove the Fuel Pump Gear 1. Remove   the   timing   case   cover   as   previously described in this Section. 2. Turn the crankshaft until all the timing marks are correctly aligned (see Fig. K.4). 3. Remove the three setscrews and spring washers which secure the gear to the fuel pump. Fig. K.7. Removing the Fuel Pump Gear. 4. Withdraw  the  gear  from  its  dowelled  location  on the fuel pump. To Refit the Fuel Pump Gear 1. Remove the idler gear from its hub. 2. Fit  the  fuel  pump  gear  to  the  fuel  pump  drive shaft  ensuring  location  of  the  dowel  in  the  gear with the slot in the shaft. 3. Secure  the  gear  with  the  three  setscrews  and spring washers. 4. Refit   the   idler   gear   to   its   hub   as   previously detailed    ensuring    that    the    timing    marks    are correctly aligned as shown in Fig. K.4. 5. Refit    the    timing    case    cover    as    previously detailed. To Remove the Timing Case 1. Remove  the  timing  case  front  cover  and  timing gears as previously described. 2. Remove   the   fuel   and   sea   water   pumps   as described in the appropriate Sections. 3. Remove the nine setscrews and spring washers securing the timing case to the cylinder block. 4. Remove     the     four     setscrews     and     washers securing the sump to the timing case. 5. Withdraw the timing case from the cylinder block taking care not to damage the sump joint. To Refit the Timing Case 1. After  ensuring  that  both  the  cylinder  block  and timing   case   faces   are   perfectly   clean,   fit   the timing  case  to  the  cylinder  block  together  with  a new joint. 2. Secure  the  timing  case  with  the  setscrews  and spring washers. 3. Secure the sump to the timing case with the four setscrews and spring washers. 4. Refit the fuel and sea water pumps as described in the appropriate sections. 5. Refit   the   timing   gears   and   timing   case   front cover as previously described. Fitting New Timing Case In  the  event  of  a  new  timing  case  being  fitted,  this will  not  be  marked  with  the  scribed  line  for  the  correct alignment of the fuel injection pump. To  arrange  this  marking  with  the  front  cover,  fuel pump    and    fuel    pump    gear    removed,    proceed    as follows:— 1. Turn   the   engine   to   T.D.C..   number   1   cylinder compression   stroke,   with   the   timing   marks   on the   camshaft   gear,   idler   gear   and   crankshaft gear alined, crankshaft keyway upper-most. Remove collets, spring cap and spring from one of  the  valves  from  number  1  cylinder  and  allow the  valve  to  rest  on  top  of  the  piston.    Care  is necessary with this operation as the consequences    of    a    valve    dropping    into    a cylinder need not be described. With the aid of a clock gauge in contact with the tip  of  the  valve  stem  now  sitting  on  number  1 piston   accurate   T.D.C.   can   be   established   by rocking   the   piston   over   T.D.C.   to   obtain   the highest   clock   reading.      Zero   the   clock   to   the highest reading, rotate the engine anti-clockwise approx   0.100   in   (2.54   mm),   then   rotate   the engine  in  a  clockwise  direction  until  the  clock gauge zeros.  This