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
            - 3.1.4.2.1. Technical characteristics
               3.1.4.2.1.1. A head of the block of cylinders of the engine
               3.1.4.2.1.2. The block of cylinders of the engine
               3.1.4.2.1.3. The Krivoshipno-shatunnyj mechanism
               3.1.4.2.1.4. System timing
               3.1.4.2.1.5. Greasing system
               3.1.4.2.1.6. Cooling system
               3.1.4.2.1.7. Fuel system
               3.1.4.2.1.8. Ignition system
               3.1.4.2.1.9. The tightening moments
            3.1.4.2.2. Engine adjustment
            3.1.4.2.3. Ignition system
            3.1.4.2.4. System timing
            3.1.4.2.5. Assemblage of engine CVH 1,8 дм3
          3.1.4.3. Engine DOHC
          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




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

The head of the block of cylinders is made of an easy alloy. Has spherical chambers and the valve, inclined in two planes, forming V-shaped system and put in action cams of the cam-shaft located in a head of the block of cylinders, by means of hydraulic pushers and levers.

Key parametres

Admissible неплоскостность the bottom surface of a head of the block of cylinders
0,15 mm
The maximum depth of grinding of the bottom surface of a head of the block of cylinders
0,25 mm
The minimum depth of chambers of combustion after grinding of the bottom surface of a head of the block of cylinders
13,9 – 14,5 mm
Diameters of apertures of nests of plugs of bearings of a cam-shaft:
  – The nominal
45,721 – 45,796 mm
  – The repair
Are increased by 0,38 mm
Diameters of apertures of nests of pushers
22,25 0,015 mm

Lining of a head of the block of cylinders

It is established by an inscription of "Torahs" upwards (towards a head of the block of cylinders).

THE VALVE

The valve are made of a special steel, are located V-shapedly and are put in action from a cam-shaft through hydraulic pushers and levers of valves.

The sizes of valves (mm)
Valve type
The inlet
The final
Length
136,50 – 136,96
133,66 – 134,12
Diameter of a plate
38,90 – 39,10
33,91 – 34,11
Diameter of a core:
  – The nominal
8,025 – 8,043
7,999 – 8,017
  – Repair 0,2
8,225 – 8,243
8,199 – 8,217
  – Repair 0,4
8,425 – 8,443
8,399 – 8,417
Valve lifting
9,535
9,535
Core backlash in the directing
0,020 – 0,069
0,046 – 0,089

Working backlash of valves: zero, hydraulic pushers are used.

Saddles of valves

Saddles of valves are inserted into a head of the block of cylinders.

Corner of a working facet of the valve
45
Width of a working facet of the valve
1,75 – 2,32 mm
Corner of the top facet of a saddle:
  – The inlet valve
30
  – The final valve
20
Corner of the bottom facet of a saddle:
  – The inlet valve
65
  – The final valve
70

Directing valves


Directing valves are made of pig-iron and впрессованы in a head of the block of cylinders.

Diameters of apertures directing:

  – The nominal: 8,063 – 8,094 mm;
  – Repair 0,2: 8,263 – 8,294 mm;
  – Repair 0,4: 8,463 – 8,494 mm.

Springs of valves


The single springs identical both for inlet, and for final valves are used.

Free length: 45,4 – 47,2 mm.
Length at the open valve: 27 mm.
Length at the closed valve: 37,084 mm.

Levers of valves

The levers of valves shaped from a steel fasten the central bolt.

Pushers

Hydraulic pushers are made of a steel, stamped in a cold condition and have the cylindrical form.

External diameter:

  – The nominal: 22,25 mm;
  – Repair 0,25: 22,50 mm.