Land Rover Defender Workshop 1993 Rover Manual

ENGINE 
RR3524M 
34. Cylinder  heads (2) 46. Plenum  chamber  upper 
35.  Rocker  covers 
(2) 47, Air filter 
36.  Oil separator 
48. Oil filler 
37.  Rocker  shafts 
(2) 49. Thermostat 
38.  Hydraulic  tappets (8)  50. Thermostat  cover 
39.  Pushrods  (8) 
51. Inlet valve  spring,  cap, seal 
and collets (8) 
40.  Rocker  brackets  (8) 52. Exhaust valve spring,  cap, collets (8) 
41.  Rocker  arms (4) left  and (4) right  53. Inlet valve  and seat  (8) 
42.  Rocker  shaft springs  (6) 
54. Exhaust...

ENGINE 
Lubrication system 
The V8 full flow  lubrication  system uses an external  gear pump  which is driven  from the front  of the  camshaft 
via  the  distributor  drive shaft.  The oil pump  gears  are housed  in the  timing  cover and the pressure  relief valve, 
warning  light switch  and filter  are 
fitted to the  gear  cover. 
Oil  drawn  through  the centrally  located steel gauze  strainer  in the  sump,  is pumped  under pressure  through oil 
cooler  located 
in the lower  half of the...

ENGINE 
RR3528M 
Distributor/oil pump drive and timing  chain 
lubrication 
The distributor/oil  pump drive, and timing  chain 
lubricated  from the camshaft  front bearing.  The feed 
to the timing  chain is channelled  along the camshaft 
sprocket,  key and  spacer  where 
it sprays  onto the 
chain. 
Unfiltered  oil 
Any blockage of the filter  element  will open  the 
by
-pass  valve  and maintain  an un-filtered oil supply 
RR3526M to the  bearings. 
1 Bearing 
2 Camshaft 
3 Key 
4 Cam gear 
5...

ENGINE 
Hydraulic tappets As the  tappet  assembly  moves off the peak  of the 
cam 
to the  closing  side, the ball  valve 2 opens to 
The  purpose of the hydraulic  tappet is to provide  equalize the pressure  in both  chambers  which 
maintenance 
free and  quiet  operation of the inlet  and  ensures  that the cylinder  valve fully closes  when the 
exhaust  valves. It achieves  its designed  purpose by tappet 
is on the  back of the cam. 
utilizing  engine oil pressures 
to eliminate  the 
mechanical...

4 
ENGINE 
ENGINE FAULT DIAGNOSIS 
ENGINE  OIL PRESSURE  TEST 
Service tools: 
LRT
-12-052:  Pressure  test equipment 
WARNING: Use  suitable  exhaust extraction 
equipment, 
if test is being  carried  out in 
NOTE: Excessive lubrication  pressure  can  effect 
engine  performance  by  over
-pressurising  the 
hydraulic  tappets causing  the  valves  to be  held 
open,  see Lubrication  system. 
workshop. 
CYLINDER  COMPRESSION - TEST 
WARNING: 
If vehicle  has  been  running, engine 
oil will be hot,...

ENGINE 
ENGINE NOISES 
Excessive or obtrusive  noise from the engine 
compartment  originates from three  main sources: 
A. The  exhaust  system, which makes  an  YES - Continue. 
unmistakable  and easy 
to diagnose  noise. 
B.  External  components  emit the greatest  variety 
2. Is the lubricating  pressure correct? 
of noises, but are  also  easy  to diagnose  by 
simply  disconnecting  the appropriate  drive  YES 
- Drain engine  oil and  filter,  and 
belt.  examine for metallic 
Engine  internal...

ENGINE 
ENGINE STARTING  PROBLEMS 
NOTE:  References  to the  Electrical  Trouble  Engine  runs at high  speed 
but will not idle 
Shooting  Manual  (ETM)  in  the  following  (stops) 
paragraphs  are  to the  Range  Rover ETM.  Engine  idle  speed erratic  Engine  starts 
but stops 
However,  only the specific  circuits referred  to in 
the  following  paragraphs  are applicable  to  the 
Defender. 
Engine  fails 
to crank Check  brake vacuum  connections. See 
ENGINE RUNNING  PROBLEMS 
immediately...

ENGINE 
5. Are cylinder  compressions  satisfactory?  Engine backfires  into inlet system 
NO - 
YES - Check  brake vacuum  correct? 
For 
overhaul,  see Remove  and 
overhaul  cylinder heads. 
connections, 
see Brakes. NO - See  Electrical. 
1. 
Is the  Distributor,  HT connections  and routing 
If  problem  is not  diagnosed:  Continue.  YES 
- Continue. 
6. Are 
the brakes  binding? 2. Is air fuel  ratio  correct? 
YES - Investigate  cause of binding. NO - Check  multiport  fuel injection, 
NO -...

ENGINE 
ENGINE REMOVAL NOTE: Release  bolts securing  compressor 
mounting  bracket to engine  and remove  bracket 
Remove  to 
enable  temporary  lifting eye ETC 
5964 to be 
fitted. Secure  lifting eye to mounting  bracket 
1. Park vehicle  on level  ground  and apply  park fixing  points  with suitable  bolts of equivalent 
brake. size,  pitch  and thread.  Leave lifting eye attached 
2. Depressurize  fuel system,  see Depressurise until  engine  is reinstalled  in vehicle. 
fuel  system. 
3. Remove...

ENGINE 
NOTE: All chain  dimensions  are measured  from 
end  of lifting  hook to end  of last  link  in chain.  Refit 
43. 
Fit lifting  chains to engine.  Raise engine  using 
25.  Fit chain  lifting eye to a suitable  engine hoist.  hoist. 
Raise  hoist high enough  to enable  engine  44. Lower  engine  into engine  compartment. 
mountings  to be  removed,  and withdraw  Ensure all components  are clear  of engine 
rubber  mountings.  assembly. 
26.  Lower  hoist until engine  rests securely  on 45....