Ford Sierra



Ford Sierra
1.2. Car identification
2. Maintenance service
- 3. The general data
   - 3.1. Cars with petrol engines
      3.1.1. Weights and transfer numbers
      3.1.2. Operational liquids
       3.1.3. Changes in a design of the car with 1984 to 1986
      - 3.1.4. Changes in a design of the car with 1987 to 1989
         3.1.4.1. Engine OHC
          3.1.4.2. Engine CVH 1,8 дм3
         - 3.1.4.3. Engine DOHC
            - 3.1.4.3.1. Technical characteristics
               3.1.4.3.1.1. A head of the block of cylinders of the engine
               3.1.4.3.1.2. The block of cylinders of the engine
               3.1.4.3.1.3. The Krivoshipno-shatunnyj mechanism
               3.1.4.3.1.4. System timing
               3.1.4.3.1.5. Greasing system
               3.1.4.3.1.6. Cooling system
               3.1.4.3.1.7. Fuel system
               3.1.4.3.1.8. Ignition system
               3.1.4.3.1.9. The tightening moments
          3.1.4.4. Service and repair
          3.1.4.5. Coupling
         3.1.4.6. A mechanical five-speed transmission of type
          3.1.4.7. A mechanical five-speed transmission of type МТ 75
         3.1.4.8. An automatic transmission
         3.1.4.9. A forward suspension bracket
          3.1.4.10. Brake system
          3.1.4.11. The electric equipment
         3.1.4.12. The general data
       3.1.5. Changes in a design of the car with 1990 till February, 1993
    3.2. Cars with diesel engines
4. Engines
5. Coupling
6. Transmissions
7. A kardannyj shaft and the back bridge
8. A steering
9. Suspension brackets
10. Brake system
11. A body
12. An electric equipment



3.1.4.3.1.1. A head of the block of cylinders of the engine
THE GENERAL DATA

The head of the block of cylinders is cast under pressure from an easy alloy and has plug-in saddles of valves.

Designation: 20

Diameters of apertures of plugs of bearings of cam-shafts: 26,00–26,03 mm.

The prevention

Grinding of the bottom surface of a head of the block of cylinders is inadmissible.


Lining of a head of the block of cylinders

The lining of a head of the block of cylinders is established without hermetic application.

Mark: Reinz.

Valves

Valves with a V-shaped arrangement, are inclined at an angle 20 to an axis of the cylinder and put in action by two cam-shafts (inlet valves and final valves).

The sizes of valves (mm)

Valve type
The inlet
The final
Length
108,24 – 108,70
108,71 – 109,17
Diameter of a plate
42,5 – 42,7
37,9 – 38,1
Diameter of a core:
  – The nominal
7,025 – 7,043
6,999 – 7,017
  – Repair 0,2
7,225 – 7,243
7,199 – 7,217
  – Repair 0,4
7,425 – 7,443
7,399 – 7,417
  – Repair 0,6
7,625 – 7,643
7,599 – 7,617
  – Repair 0,8
7,825 – 7,843
7,799 – 7,817
Core backlash in directing (mm)
0,020 – 0,069
0,046 – 0,095
Corner of a working facet
90
90

Working backlash of valves

In the engine the hydraulic pushers providing automatic adjustment of a backlash of valves are used.

Saddles of valves

The saddles of valves made of an alloy of a steel and copper, are inserted into a head of the block of cylinders.

The sizes of saddles of valves

Saddle type Nest of the inlet valve Nest of the final valve
Corner of the top facet
60
60
Corner of a working facet
89 – 90
89 – 90
Width of a working facet
1,33 – 2,19
1,68 – 2,54
Corner of the bottom facet
140
140

Directing valves

Directing valves are made of pig-iron, are inserted into a head of the block of cylinders and are inclined to a cylinder axis at an angle 120 .

Diameters of apertures directing (standard): 7,063 – 7,094 mm.

Springs of valves

It is used on two springs on each valve.

The characteristic of springs of valves

Spring type
The external
The internal
Free length (mm)
46,8
46,2
Internal diameter (mm)
24
17,5
Diameter of a wire (mm)
4,5
2,5
Number of working coils
6,1
8