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


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3.1.4.3.1.3. The Krivoshipno-shatunnyj mechanism
THE GENERAL DATA

Cranked shaft

The cranked shaft is shaped together with counterbalances and leans on five radical bearings.

The axial backlash is regulated by thickness of persistent half rings on the average the radical bearing.

Diameters of radical necks
The nominal:
  – A sign yellow
54,980 – 54,990 mm
  – A sign red
54,990 – 55,000 mm
Reduced (a sign green)
54,730 – 54,750 mm
Radial backlash in radical bearings
0,011 – 0,048 mm
Axial backlash of a cranked shaft
0,090 – 0,300 mm
Thickness of persistent half rings:
  – The nominal
2,301 – 2,351 mm
  – Repair (a sign yellow)
2,491 – 2,541 mm
Diameter шатунных necks:
  – The nominal
50,890 – 50,910 mm
  – Reduced (a sign green)
50,640 – 50,660 mm

Radical loose leaves

The semiloose leaves located in the block of cylinders, have an aperture and a flute for oil.

Internal diameter of loose leaves after installation in the block of cylinders:
  – The nominal
55,001 – 55,038 mm
  – Repair-0,05
54,951 – 54,988 mm
  – Repair-0,25
54,751 – 54,788 mm
  – Repair-0,50
54,501 – 54,538 mm
  – Repair-0,75
54,251 – 54,288 mm

Rods

Rods are shaped from a steel and have двутавровое section of a rod and a straight line of a socket of the bottom head. The aperture serves in the bottom head of a rod for dispersion of oil in the piston for its cooling and greasing, and also for cooling of a piston finger and a rod head. Rods depending on weight are divided into four groups (And, In, With, D). Rods in the engine should belong to one group.

Diameter of an aperture of the bottom head
53,890 – 53,910 mm
Diameter of an aperture of a head
20,589 – 20,609 mm
Radial backlash in шатунных bearings
0,006 – 0,060 mm

Shatunnye loose leaves

Internal diameter of loose leaves after installation in a rod:
  – The nominal
50,916 – 50,950 mm
  – Repair-0,025
50,891 – 50,925 mm
  – Repair-0,25
50,666 – 50,700 mm
  – Repair-0,50
50,416 – 50,450 mm
  – Repair-0,75
50,166 – 50,200 mm
  – Repair-1,00
49,916 – 49,950 mm
Axial backlash of a rod (on cranked to a shaft)
0,090 – 0,310 mm

Pistons

Pistons are cast from an easy alloy, have a full shirt and the shifted axis of an aperture of a piston finger.

Installation method: the arrow should be at the bottom directed towards a system drive timing.

Nominal diameters of pistons:
  – Group 1
85,970 – 85,980 mm
  – Group 2
85,980 – 85,990 mm
Repair diameters of pistons:
  – The standard
85,980 – 86,000 mm
  – Repair 0,15
86,130 – 86,150 mm
  – Repair 0,50
86,470 – 86,490 mm
Piston backlash in the cylinder:
  – The nominal
0,020 – 0,040 mm
  – The repair
0,010 – 0,040 mm

Piston rings

Each piston has three rings:

  – The first (top) – sealing бочкообразное;
  – Second (average) – sealing conic;
  – The third (bottom) – маслосъемное (from three parts with spring экспандером).

Backlash of the lock of rings (placed in the cylinder):
  – The first sealing
0,30 – 0,60 mm
  – The second sealing
0,50 – 0,80 mm
  – маслосъемное
0,40 – 1,50 mm

Piston fingers

The fingers made of a steel, запрессованы in a head of a rod also rotate in piston naves.

Installation method: after heating of a rod to temperature 260 –300 With.

Length:
63,4 mm
Diameter:
  – A designation white colour
20,622 – 20,625 mm
  – A designation red colour
20,626 – 20,628 mm
  – A designation blue colour
20,628 – 20,631 mm
  – A designation yellow colour
20,631 – 20,634 mm
Backlash in piston naves
0,008 – 0,014 mm
Tightness in a rod head
0,018 – 0,039 mm

Flywheel

The flywheel is screwed on a cranked shaft by six asymmetrically located bolts.