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
   + 3.1. Cars with petrol engines
   - 3.2. Cars with diesel engines
      - 3.2.1. Changes in a car design from 1988 to 1993.
         3.2.1.1. Dm3 engine 2,3
         - 3.2.1.2. Dm3 engine 1,8
            3.2.1.2.1. Technical characteristics
            3.2.1.2.2. Head of the block of cylinders
            3.2.1.2.3. Block of cylinders
            3.2.1.2.4. Krivoshipno-shatunny mechanism
            3.2.1.2.5. System of gas distribution
            3.2.1.2.6. Lubrication system
            3.2.1.2.7. Cooling system
            3.2.1.2.8. Fuel system
            3.2.1.2.9. Tightening moments
            3.2.1.2.10. Adjustment of the engine
         + 3.2.1.3. Fuel system
         + 3.2.1.4. The repair which is not demanding removal of the engine
         3.2.1.5. Removal and installation of the engine
         3.2.1.6. Dismantling of the engine
         3.2.1.7. Check of details
         3.2.1.8. Check of gaps of a bent shaft and rods
         3.2.1.9. Assembly of the engine
         3.2.1.10. Lubrication system
         3.2.1.11. Cooling system
         3.2.1.12. Coupling
         3.2.1.13. Mechanical MT 75 five-speed transmission
         3.2.1.14. Power shaft and back bridge
         3.2.1.15. System of steering
         3.2.1.16. Forward suspension bracket
         3.2.1.17. Brake system
         3.2.1.18. Electric equipment
         3.2.1.19. General data
+ 4. Engines
+ 5. Coupling
+ 6. Transmissions
+ 7. Driveshaft and back bridge
+ 8. Steering
+ 9. Suspension brackets
+ 10. Brake system
+ 11. Body
+ 12. Electric equipment





3.2.1.2.4. Krivoshipno-shatunny mechanism

GENERAL INFORMATION

Krivoshipno-shatunny mechanism

1 – bent shaft,

2 – intermediate shaft,

3 – inserts of radical bearings of a bent shaft,

4 – persistent half rings of a bent shaft,

5 – pulley,

6 – covers of radical bearings,

7 – rod,

8 – rod cover,

9 – inserts of conrod bearings,

10 – piston,

11 – piston rings,

12 – lock spring ring,

13 – piston finger,

14 – rod head plug

Bent shaft

The bent shaft is made of cast iron together with eight counterbalances and leans on five radical bearings.

Diameter of radical necks:
  – nominal
53,970 – 53,990 mm
  – repair-0,25
53,720 – 53,740 mm
  – repair-0,50
53,470 – 53,490 mm
Diameter of conrod necks:
  – nominal
48,970 – 48,990 mm
  – repair-0,25
48,720 – 48,740 mm
  – repair-0,50
48,470 – 48,490 mm
Width of the average radical bearing:
  – nominal
31,070 – 31,130 mm
  – repair
32,070 – 32,130 mm
Radial gap of radical bearings of a bent shaft
0,015 – 0,062 mm
Axial gap of a bent shaft
0,093 – 0,306 mm
The maximum moment of friction in radical bearings of a bent shaft (without the established knots the piston rod)
10 Nanometer

Inserts of radical bearings

Inserts are thin-walled. The manufacturer does not give the sizes of inserts.
As spare details inserts nominal and repair are delivered: reduced by 0,25 mm and 0,50 mm.

Rods

Rods with four distances between axes of openings of a head and the basis for providing one extent of compression in all cylinders of the engine are made. The designations "A", "B", "C" and "D" put on a side surface of covers of rods define selective group of distance between axes of openings of a head and the basis.

Method of installation of a rod concerning the block of cylinders: the letter "F" put on a side surface of a rod has to be from the drive of system of gas distribution.

Diameter of an opening of a nest of an insert of the conrod bearing: 52,000–52,020 mm.

Diameter of an opening in the rod head plug: 26,012–26,020 mm.

Distance between axes of openings of a head and the basis of a rod:

 – group A: 129,880–129,940 mm;
 – group B: 129,941–130,000 mm;
 – group C: 130,011–130,060 mm;
 – group D: 130,061–130,120 mm.

Inserts of conrod bearings

Thin-walled inserts. The manufacturer does not give the sizes of inserts. As spare details inserts nominal and repair are delivered: reduced by 0,25 mm and 0,50 mm.

Pistons

Pistons from light alloy with the filled-in steel insert are used.

Diameters of pistons (measured at right angle to an axis of a piston finger):
  – nominal:
     • group A
82,460 – 82,475 mm
     • group B
82,475 – 82,490 mm
     • group C
82,620 – 82,635 mm
     • group D
82,635 – 82,650 mm
  – repair:
     • group E (+0,5 mm)
82,961 – 82,979 mm
     • group F (+1,0 mm)
83,461 – 83,479 mm
Piston gap in the cylinder:
  – groups A and D
0,025 – 0,055 mm
  – groups E and F
0,021 – 0,054 mm
Vystupaniye in piston bottom VMT over the top plane of the block of cylinders
0,50 – 0,84 mm

Piston fingers

The finger rotates in the piston and the plug of a head of a rod (a so-called floating finger) and is recorded from longitudinal movement by two spring lock rings.

Installation of lock rings in a piston flute: section up.

Outer diameter of a finger: 25,996–26,000 mm.

Piston rings

Each piston has three rings: two sealing and one oil scraper.

Installation method: the inscription "Top" (top) is directed towards a piston bottom.

Width of the lock (section) of the ring located in the cylinder:

 – top ring (sealing): 0,35–0,50 mm;
 – average ring (sealing): 0,35–0,50 mm;
 – lower ring (oil scraper): 0,25–0,45 mm.

Gap in a piston flute:

 – top ring (sealing): 0,090–0,122 mm;
 – average ring (sealing): 0,050–0,082 mm;
 – lower ring (oil scraper): 0,030–0,065 mm.

Flywheel

Radial beats: 0,13 mm.
Number of teeths of a wreath: 135.