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
      - 4.1.1. Technical characteristics Head of the block of cylinders Block of cylinders of the engine Krivoshipno-shatunny mechanism Gazoraspredeleniye system Greasing system Cooling system Fuel system Ignition system Tightening moments
      4.1.2. Adjustment of gaps of valves
      + 4.1.3. Ignition system
      + 4.1.4. Fuel system
      + 4.1.5. The repair which is not demanding removal of the engine
      4.1.6. Removal and engine installation
      4.1.7. Engine dismantling
      4.1.8. Identification of cooperating parts
      4.1.9. Engine assembly
      4.1.10. Replacement of pistons
      4.1.11. Removal and installation of an intermediate shaft
      4.1.12. Gazoraspredeleniye system
      4.1.13. Greasing system
      + 4.1.14. Cooling system
      4.1.15. Suspension bracket of the power unit
      4.1.16. System of production of the fulfilled gases
   + 4.2. Diesel engine
+ 5. Coupling
+ 6. Transmissions
+ 7. Driveshaft and back bridge
+ 8. Steering
+ 9. Suspension brackets
+ 10. Brake system
+ 11. Body
+ 12. Electric equipment Krivoshipno-shatunny mechanism


Cranked shaft

The steel cranked shaft leans on five bearings.

Axial люфт
0,08-0,28 mm
Diameters of radical necks:
  – nominal size
56,970-56,990 mm
  – repair size-0,25
56,720-56,740 mm
  – repair size-0,50
56,470-56,490 mm
  – repair size-0,75
56,220-56,240 mm
  – repair size-1,00
55,970-55,990 mm
Gap in radical bearings
0,010-0.064 mm


Measurement to carry out by means of measuring cores of Plastigage.

Diameters of shatunny necks:
  – nominal size
51,980-52,000 mm
  – repair size-0,25
51,730-51,750 mm
  – repair size-0,50
51,480-51,500 mm
  – repair size-0,75
51,230-51,250 mm
Thickness of persistent half rings:
  – nominal size
2,30-2,35 mm
  – repair size
2,50-2,55 mm


The flywheel is fixed on a flange of a cranked shaft by six bolts.

Intermediate shaft

The intermediate shaft is located in a forward part of the block of cylinders, on the left side. Provides a drive of the distributor of ignition, and also oil and fuel pumps.

Axial gap – 0,050–0,204 mm.


Rods are shaped from steel and in section the dvutavrovy profile has them. The piston finger is pressed in a rod head.

Diameter of an opening of a head of a rod
23,964-23,976 mm
Finger tightness in a rod head:
0,018-0,039 mm
Temperature of heating of a head of a rod in the course of finger installation
250-300 ° With
Diameter of an opening of the basis of a rod
55,000-55,020 mm
Internal diameters of openings of shatunny loose leaves:
  – nominal size
52,006-52,044 mm
  – repair size-0,25
51,756-51,794 mm
  – repair size-0,50
51,706-51,744 mm
  – repair size-0,75
51,256-56,294 mm
  – repair size-1,00
51,006-51,044 mm
Gap in radical bearings
0,006-0.064 mm


Measurement to carry out by means of measuring cores of Plastigage.

Admissible not perpendicularity of an axis of openings concerning a rod axis:
  – head opening
0,10 mm
  – basis opening
0.15 mm


Pistons are made of an easy alloy, without flutes on a carrying-out part, with the filled-in invarny ring limiting thermal errors of the sizes. In the top part there are three flutes for piston rings. The axis of an opening of a piston finger is displaced concerning a piston axis. Pistons are delivered in sets together with fingers and rods.

Installation method: the arrow at the bottom of the piston should be directed towards a forward part of the engine (towards a drive of system of a gazoraspredeleniye).

Piston fingers

The fingers made of an alloy of steel and subjected to thermal processing, are pressed in heads of rods (hot installation at temperature of a head 250 °–300 ° C) and turn in piston naves.

  – двигатель1,3 dm3
60,0-60,8 mm
  – двигатель1,6 dm3
68,0-68,8 mm
  – двигатель2,0 dm3
72,0-72,8 mm
  – designation by red color
  – designation by dark blue color
  – designation by red color
Gap in piston naves
0,008-0,014 mm
Tightness in a rod head
0,018-0,039 mm

Sizes of pistons (mm)

1,3 dm3
1,6 dm3
2,0 dm3
Diameters the nominal standard:
  – group 1
  – group 2
  – group 3
  – group 4
Diameters of the repair sizes:
 – the standard
 – with the admission 0,5
  – with the admission 1,0
Gap of new pistons in цилинрах

Piston rings

Each piston has three rings: two sealing and one maslosjemny.

Gap of the lock of sealing rings (located in the cylinder):
  – двигатель1,3 dm3 and двигатель1,6 dm3
0,30-0,50 mm
  – двигатель2,0 dm3
0,038-0,048 mm
Gap of the lock of a maslosjemny ring
0,40-1,40 mm

Arrangement of locks of rings:

 – the sealing – on 150 ° (to the opposite sides) concerning the lock of a maslosjem-ny ring;
 – the maslosjemny – the lock of a holding apart spring is established according to the arrow direction at the bottom of the piston; locks of the top and bottom plates are established on 25 mm to the right and to the left from the arrow direction.