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
      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
         4.1.5.1. Removal and installation of a gear belt
         4.1.5.2. Removal of a head of the block of cylinders
         4.1.5.3. Dismantling and assembly of a head of the block of cylinders
         4.1.5.4. Installation of a head of the block of cylinders
      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





4.1.5.3. Dismantling and assembly of a head of the block of cylinders

GENERAL INFORMATION

Knot of a head of the block of cylinders

1–cover of a head of the block of cylinders,

2–laying of a cover,

3–plugs of bearings of a cam-shaft,

4–head of the block of cylinders,

5–sealing ring of a cam-shaft,

6–the pipeline of supply of oil to bearings of a cam-shaft,

7–laying of a head of the block of cylinders

Longitudinal fixing of a cam-shaft

1–adjusting plate,

2–cam-shaft

Dismantling

PERFORMANCE ORDER
1. To arrange a head of the block of cylinders in forward and back parts on two wooden whetstones.
2. To remove an inlet collector together with the carburetor and a tube of removal of cooling liquid.
3. To unscrew a thermal casing, and then a final collector.
4. To unscrew hairpins of fastening of both collectors.
5. To unscrew the sensor of temperature of cooling liquid.
6. To remove tubes of supply of oil to cam-shaft bearings.
7. To remove (adaptation 21.005 A) in the order of a spring of the lever of valves, and also levers of valves.
8. To compress in the order of a spring of valves (adaptation 21.005 A), to take wedges crackers of fastening of the top persistent plate of a spring. To remove the top plate and a valve spring, paying attention not to injure a valve neck.
9. To remove a pulley from a cam-shaft, holding a cam-shaft with a flat key for grooves behind the sixth cam. To remove persistent laying of a pulley of a cam-shaft, and also its sealing ring.
10. To unscrew two bolts of fastening of a persistent flange in a back part of a cam-shaft and carefully to extend back a cam-shaft. To unscrew the bolts forming an emphasis for the lever of valves, coming to an end with spherical tips. If they are used later, it is necessary to designate them so that in the course of assembly they were established in the same places and could cooperate with the same levers of valves.
11. To unscrew the tension device of a gear belt (adaptation 21.012) and to remove the remote plug.

Check of directing plugs of valves

Worn-out directing plugs of valves do not provide coaxial installation of valves in saddles that leads to significant increase in fuel consumption and oil.

PERFORMANCE ORDER
1. To insert the valve into directing plug and moving the valve in the cross-section direction to check a gap.
2. If the gap exceeds admissible norms it is necessary to make processing of the directing plug by means of the corresponding development till the next increased size. Processing of the directing plug is necessary for beginning with the party of the chamber of combustion.
3. If directing plugs were exposed to processing, it is necessary to establish valves with cores of the increased diameter.
4. Processing of saddles of valves in a head of the block of cylinders.
5. Saddles of valves with wear tracks or a podgoraniye are necessary for processing with obligatory preservation of corners and facet sizes. Otherwise it is necessary to make replacement of a head of the block of cylinders. After any processing of saddles of valves it is necessary to carry out grinding in of valves.

Grinding in

PERFORMANCE ORDER
1. Grinding in of valves is necessary for making with application of only fine-grained polishing paste.
2. A surface of a saddle of the valve to grease with a small amount of paste and to establish the valve in the corresponding saddle. Densely to press to a plate of the valve a rubber sucker and to rotate the valve in one or other party.
3. After the completion of process of grinding in all details carefully to clear of dirt and пасмты and to check a saddle and a plate of the valve. The continuous opaque ring on both details which specifies width of a facet of the valve should be visible.

Assembly

PERFORMANCE ORDER
1. To screw up hairpins of fastening of collectors, and then the sensor of temperature of cooling liquid.
2. To oil for gipoidny transfers of the class SAE 80/90 of a neck, cams and persistent surfaces of a cam-shaft, internal surfaces of bearing rings, spherical tips of bolts of an emphasis of the lever of valves, and also surfaces of the lever of the valves, cooperating with cam-shaft cams.
3. To insert behind a head of the block of cylinders a cam-shaft before installation of his necks in rings of bearings, paying attention not to damage sliding surfaces.
4. To screw up the bolts supporting the lever of valves and a nut, protecting them from unscrewing. To oil cores of valves and directing valves for gipoidny transfers of the class SAE 80/90. To insert the valve and to paste over with a sticky tape of an installation site of crackers.
5. To grease with engine oil maslootrazhatelny caps, to insert their (adaptation 21.007) and to remove a sticky tape from cores of valves.
6. To insert in the order of a spring of valves and the top plates. To compress springs and to insert crackers.
7. To establish the lever of valves.
8. To oil and establish a new sealing ring of the forward bearing of a cam-shaft.
9. To insert a persistent lining and a gear wheel (the strengthened party outside) on a cam-shaft.
10. To establish the springs holding the lever of valves and to adjust a gap of valves.
11. To establish the remote plug, a casing of a gear belt and the tension device.
12. To screw the pipeline of supply of oil on cam-shaft bearings, the chamber of removal of cooling liquid from a head of the block of cylinders, and also the thermostat (new laying).
13. To lay on laying of an inlet collector a sealing cord of 5 mm (And 70 SX 19554-BA) to establish new laying of a final collector and to screw both collectors.
14. To screw a thermal casing of a final collector.

Prevention

In case of installation of earlier used valves in a new head of the block of cylinders it is necessary to arrive as follows:

  – to grind in the valve and their nest;
  – carefully to clear of the paste which has remained after grinding in, to oil cores of valves and then to arrive, as it is described above.