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
      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

4.2.6. Compression check


Compression measurement

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 the 30th bar is necessary компрессометр for diesel engines with the maximum indications not less.

1. Completely to charge the accumulator. To adjust gaps of valves. The engine to warm up to working temperature.
2. To disconnect a food of 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 in a nest of a candle to screw transitional the union компрессометра.
4. To turn a cranked shaft a starter several times. To fix the maximum value of pressure of compression.
5. To repeat measurements on other three cylinders.
6. Decrease in a compression in all cylinders indicates wear of cylinders, rings and pistons more often.
7. The lowered compression in one of cylinders means damage of plates and saddles of valves, a burn-out or cracks in the piston, damage of laying of a head of the block of cylinders or a crack in a head of the block of cylinders.
8. The lowered compression in two next cylinders means damage of laying of a head of the block of cylinders between cylinders more often.