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 Block of cylinders Krivoshipno-shatunny mechanism Greasing system Fuel system 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 Krivoshipno-shatunny mechanism


Cranked shaft

The cranked shaft is shaped from steel together with four counterbalances and leans on five radical bearings.
Axial люфт
0,08-0,29 mm
Diameters of radical necks:
  – nominal size
59,994-60,021 mm
  – 1st repair size
59,694-59,721 mm
  – 2nd repair size
59,494-59,521 mm
  – 3rd repair size
59,194-59,221 mm
Length of radical necks:
  – lobby
38,40-38,55 mm
  – the intermediate
30,40-30,60 mm
  – average
37,76-37.81 mm
  – the back
37,84-38,04 mm
Gap of necks in radical bearings
0,040-0.098 mm
Diameters of shatunny necks:
  – nominal size
54,984-55,011 mm
  – repair size
54,684-54,711 mm
Length of shatunny necks
36,00-36,10 mm
Thickness of persistent half rings:
  – nominal size
2,30-2,33 mm
  – repair size
2,50-2.53 mm

Radical loose leaves

These are thin-walled loose leaves with a cover from a steel sheet and an antifrictional material from a tsinko-aluminum alloy.
Width of loose leaves:
  – forward, average and back
29,80 mm
  – the intermediate
21,80 mm


Rods are shaped from steel and have a dvutavrovy profile in a cut and a straight line of the socket of the basis.
Distance between axes of openings of a head and the basis
150 mm
Internal diameter of the plug of a head of a rod (after installation)
28,0+0,02-28,0+0,07 mm
Gap of a shatunny neck in a rod the bearing
0,040-0,098 mm

Shatunnye loose leaves

These are thin-walled loose leaves with a cover from a steel sheet and an antifrictional material from a tsinko-aluminum alloy.
Thickness of loose leaves:
  – the nominal
1,819 ± 0,003 mm
  – the repair
1,969 ± 0,003 mm
Width of loose leaves
29,0 mm


Pistons are made of an aluminum-silicon alloy.
The maximum difference of mass of a set of pistons of the engine should not exceed 5 g
Installation method in the cylinder
Deepenings at the bottom of the piston (for plates of valves and the combustion chamber) should be from the fuel pump
Diameter of the piston (measured under an opening of a piston finger and in parallel to an axis of this opening)
  – the nominal:
   • group A
93,855-93,870 mm
   • group B
93,870-93,885 mm
  – 1st repair size:
   • group C
94,055-94,070 mm
   • group D
94,070-94,085 mm
  – 2nd repair size:
   • group E
94,255-94,270 mm
   • group F
94,270-94,285 mm
  – 3rd repair size:
   • group G
94,455-94,470 mm
   • group H
94,470-94,485 mm
Vystupaniye of pistons in VMT over the top plane of the block of cylinders
0,54-0,89 mm
Piston gap in the cylinder
0,130-0,160 mm

Piston fingers

The finger is made of steel and superficially tempered.
The finger rotates in the piston and the plug of a head of a rod (a so-called floating finger) and is fixed from longitudinal moving by two spring lock rings
External diameter
27,994-28,000 mm

Piston rings

Each piston has three rings:
  – the top
Sealing with the chromeplated, convex external working surface
  – average
Sealing with a conic external working surface
  – the bottom
Maslosjemnoye of the U-Flex type
Installation method: concerns average and bottom rings, the inscription of "Torahs" (top) is directed towards a piston bottom.
Width of the lock of a ring established in the cylinder:
  – top ring
0,40-0,65 mm
  – average ring
0,35-0,60 mm
  – bottom ring
0,15-0,30 mm
Thickness of rings:
  – the top
1,978-1,990 mm
  – average
1,978-1,990 mm
  – the bottom
4,478-4,490 mm
Gap of rings in piston flutes
 0,032-0,090 mm

Gazoraspredeleniye system

The system of a gazoraspredeleniye contains:

  – a cam-shaft established in the block of cylinders;
  – pushers;
  – cores of pushers;
  – levers of valves and valve.

The cam-shaft is put in action by a dvukhryadny chain from a cranked shaft.

Distribution phases

Phases of distribution are defined at a zero gap of valves for lifting of final and inlet valves of equal 0,60 mm.
12 ° before VMT
40 ° after NMT
56 ° before NMT
12 ° after VMT
Respectively opening and closing of the inlet valve
Respectively opening and closing of the final valve
Working gap of valves (in a cold condition):
  – gap of inlet valves
0,30 mm
  – gap of final valves
0,35 mm


The pig-iron cam-shaft has cams with the improved thermal characteristics and is established in the block of cylinders on three bearings.

Diameters of necks
41,925-41,950 mm
Radial люфт
0,05-0,11 mm
Axial люфт
0,05-0,15 mm
Lifting of cams (at a zero gap of valves):
  – the inlet:
9,12 mm
  – the final:
9,12 mm