Ford Sierra

1982-1993 of release

Repair and operation of the car



Ford Siyerra
+ 1.2. Identification of the car
+ 2. Maintenance
+ 3. General data
- 4. Engines
   + 4.1. Petrol engines
   - 4.2. Diesel engine
      - 4.2.1. Technical characteristics
         4.2.1.1. Block of cylinders
         4.2.1.2. Krivoshipno-shatunny mechanism
         4.2.1.3. Lubrication system
         4.2.1.4. Fuel system
         4.2.1.5. 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. Check of a compression
      4.2.7. Removal of air 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 speed 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





4.2.1.2. Krivoshipno-shatunny mechanism

GENERAL INFORMATION

Bent shaft

The bent shaft is shaped from steel together with four counterbalances and leans on five radical bearings.
Axial side play
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
  – intermediate
30,40 – 30,60 mm
  – average
37,76 – 37.81 mm
  – back
37,84 – 38,04 mm
Gap of necks in radical bearings
0,040 – 0.098 mm
Diameters of conrod necks:
  – nominal size
54,984 – 55,011 mm
  – repair size
54,684 – 54,711 mm
Length of conrod 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 inserts

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

Rods

Rods are shaped from steel and have a dvutavrovy profile in a section and a basis socket straight line.
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 conrod neck in the conrod bearing
0,040 – 0,098 mm

Connecting rods

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

Pistons

Pistons are manufactured of aluminum-silicon alloy.
The maximum difference of mass of a set of pistons of the engine should not exceed 5 g
Method of installation in the cylinder
Deepenings at the bottom of the piston (for plates of valves and the combustion chamber) have to 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)
  – 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 N
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 movement by two spring lock rings
Outer diameter
27,994 – 28,000 mm

Piston rings

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

System of gas distribution

The system of gas distribution contains:

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

The cam-shaft is put in action by a two-row chain from a bent shaft.

Distribution phases

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

Cam-shaft

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

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