Ford Sierra

1982-1993 of release

Repair and car operation



Ford Siyerra
+ 1.2. Car identification
+ 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. Greasing 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. Compression check
      4.2.7. Air removal 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 number of turns 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)
YТТ (PEUGEOT XD2P)
  – since January, 1987 (Sierra '87)
YТР
Diameter of the cylinder
94 mm
Piston stroke
83 mm
Working volume
2304 cm3
Pressure of compression:
  – the nominal
2,5 MPas
  – the minimum
2,0 MPas
  – an admissible difference between cylinders
0,5 MPas
Rated power
49 kW (67 h.p.)
Nominal number of turns
4200 rpm
Maximum torque
139 Nanometers
Number of turns at the maximum moment
2000 rpm

Block head цилинров

The head is executed from an easy alloy with the inserted chambers of combustion, saddles and directing valves.

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

Combustion chambers

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

Type of the chamber of combustion
vortical Ricardo Comet Mark V
Diameter of a ball
3 mm
Vystupaniye of vortical chambers from the bottom plane of a head of the block of cylinders
0–0,03 mm

Saddles of valves

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

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

Directing valves

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

External diameter:
  – the 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 the directing and bottom 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 bottom 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 the directing
0,15 mm
Corner of a working facet:
  – inlet valve
120 °
  – final valve
90 °
Full length of the valve
116,25 mm
Zaglubleniye of valves of rather bottom 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

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

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 spring end with the compressed rounds, should 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 a synthetic material and had originally (engines with number below SH 79876) two thickness, and then (engines with number above SH 79876) three thickness. The thickness of laying steals up depending on a vystupaniye of pistons over the top plane of the block of cylinders of the engine. The 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 in thickness of 1,58 mm (designation: 2 cuts)
  – more than 0,84 mm
laying in thickness of 1,70 mm (designation: 3 cuts)
Vystupaniye of pistons (engines with number above SH 79876):
  – from 0,69 to 0,79 mm
Laying in thickness of 1,53 mm (designation: 2 cuts)
  – from 0,79 to 0,89 mm
laying in thickness of 1,63 mm (designation: 3 cuts)
  – more than 0,89 mm
laying in thickness of 1,73 mm (designation: 4 cuts)
As spare parts laying of only new type (three thickness) are made