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
      4.2.2. 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


4.2.6. Check of a compression


Measurement of a compression

The size of a compression shows, in most cases, the tsilindro-piston group of the engine is how worn-out.

For measurement of a compression it is necessary компрессометр for diesel engines with the maximum indications not less than 30 bars.

1. To completely charge the accumulator. To adjust gaps of valves. To warm up the engine up to the working temperature.
2. To power off candles of an incandescence and the socket of the electromagnetic valve of supply of fuel.
3. To remove one of candles of an incandescence and to screw in a nest of a candle transitional the union of a kompressometr.
4. To turn a bent shaft a starter several times. To record the maximum value of pressure of compression.
5. To repeat measurements on other three cylinders.
6. Decrease in a compression in all cylinders most often indicates wear of cylinders, rings and pistons.
7. The lowered compression in one of cylinders means damage of plates and saddles of valves, a burn-out or cracks to the piston, damage of laying of a head of the block of cylinders or a crack to a head of the block of cylinders.
8. The lowered compression in two next cylinders most often means damage of laying of a head of the block of cylinders between cylinders.