Ford Sierra

1982-1993 of release

Repair and operation of the car



Ford Siyerra
+ 1.2. Identification of the car
+ 2. Maintenance
+ 3. General data
- 4. Engines
   + 4.1. Petrol engines
   - 4.2. Diesel engine
      - 4.2.1. Technical characteristics
         4.2.1.1. Block of cylinders
         4.2.1.2. Krivoshipno-shatunny mechanism
         4.2.1.3. Lubrication system
         4.2.1.4. Fuel system
         4.2.1.5. Tightening moments
      4.2.2. Check and adjustment of gaps of valves
      + 4.2.3. Fuel system
      + 4.2.4. Nozzles
      4.2.5. Glow plugs
      4.2.6. Check of a compression
      4.2.7. Removal of air from fuel system
      4.2.8. Fuel filter
      4.2.9. Fuel pump, installation of the beginning of injection of fuel
      4.2.10. Adjustment of speed of idling
      + 4.2.11. The repair which is not demanding removal of the engine
+ 5. Coupling
+ 6. Transmissions
+ 7. Driveshaft and back bridge
+ 8. Steering
+ 9. Suspension brackets
+ 10. Brake system
+ 11. Body
+ 12. Electric equipment





4.2.1. Technical characteristics

GENERAL INFORMATION

Engine type:
  – till December, 1986 (Sierra '83)
YTT (Peugeot XD2P)
  – since January, 1987 (Sierra '87)
YTP
Diameter of the cylinder
94 mm
Piston stroke
83 mm
Working volume
2304 cm3
Compression pressure:
  – nominal
2,5 MPas
  – minimum
2,0 MPas
  – an admissible difference between cylinders
0,5 MPas
Rated power
49 kW (67 h.p.)
Nominal speed
4200 rpm
Maximum torque
139 Nanometer
Speed at the maximum moment
2000 rpm

Head of the block of tsilinr

The head is made of light alloy with the inserted combustion chambers, saddles and guides of valves.

Height of a head of the block of cylinders
90 ± 0,15 mm
Maximum size of regrinding of the lower plane of a head of the block of cylinders
0,5 mm
Maximum not planeness of the lower plane of a head of the block of cylinders:
  – cross
0,1 mm
  – on diagonal
0,2 mm

Combustion chambers

Vortex combustion chambers, steel, inserted into a head of the block of cylinders and recorded by means of a ball.

Combustion chamber type
vortex Ricardo Comet Mark V
Diameter of a ball
3 mm
Vystupaniye of vortex cameras from the lower plane of a head of the block of cylinders
0 – 0,03 mm

Saddles of valves

Saddles of valves of a vpressovana in a head of the block of cylinders.

Corner of a working facet of a saddle of the valve:
  – inlet
120 °
  – final
90 °
Width of a working facet
2,2 – 2,5 mm
Outer diameter of saddles of inlet valves:
  – nominal
42,275 – 43,325 mm
  – repair
42,475 – 42,525 mm
Outer diameter of saddles of final valves:
  – nominal
36,275 – 36,525 mm
  – repair
36,475 – 36,525 mm

Guides of valves

Guides of valves are pressed in a head of the block of cylinders and are identical both for inlet, and to final valves.

Outer diameter:
  – nominal
14,048 – 14,059 mm
  – the first repair
14,280 – 14,290 mm
  – the second repair
14,579 – 14,590 mm
Internal diameter
8,520 – 8,542 mm
Length
55 mm
Distance between a guide and the lower plane of a head of the block of cylinders
27,95 – 28,05 mm

Valve

The valve are established in a head of the block of cylinders vertically and in parallel each other (at right angle to the lower plane of a head of the block of cylinders).

Diameter of a plate:
  – inlet valve
40,5 mm
  – final valve
33,5 mm
Diameter of a core:
  – inlet valve
8,473 – 8,495 mm
  – final valve
8,453 – 8,475 mm
The maximum gap of the valve in a guide
0,15 mm
Corner of a working facet:
  – inlet valve
120 °
  – final valve
90 °
Full length of the valve
116,25 mm
Deepening of valves of rather lower plane of a head of the block of cylinders:
0,75 – 1,15 mm.
Working gap of valves (at the cold engine)
Gap of inlet valves
0,30 mm
Gap of final valves
0,35 mm

Springs of valves

About two springs on each valve, identical to inlet and final valves are used.

Free length:
  – internal spring
41,00 mm
  – external spring
44,6 mm
Length under load of 155 N (15,8 kg):
  – internal spring
22 ± 0,5 mm
  – external spring
26 ± 0,5 mm
Diameter of a wire of a spring:
  – internal spring
2,3 mm
  – external spring
3,8 mm
Internal diameter:
  – internal spring
15,0 0 + 0,40 mm
  – external spring
23,2 0 + 0,40 mm
Installation method: the end of a spring with the compressed rounds, has to be from a head of the block of cylinders

Laying of a head of the block of cylinders

Laying of a head of the block of cylinders was made of synthetic material and had originally (engines with number below SH 79876) two thickness, and then (engines with number above SH 79876) three thickness. Thickness of laying is selected depending on a vystupaniye of pistons over the top plane of the block of cylinders of the engine. Thickness of laying is identified on number of cuts on its edge.

Vystupaniye of pistons (engines with number below SH 79876):
  – less than 0,84 mm
laying 1,58 mm thick (designation: 2 cuts)
  – more than 0,84 mm
laying 1,70 mm thick (designation: 3 cuts)
Vystupaniye of pistons (engines with number above SH 79876):
  – from 0,69 to 0,79 mm
Laying 1,53 mm thick (designation: 2 cuts)
  – from 0,79 to 0,89 mm
laying 1,63 mm thick (designation: 3 cuts)
  – more than 0,89 mm
laying 1,73 mm thick (designation: 4 cuts)
As spare parts laying only of new type (three thickness) are made