VOLKSWAGEN GOLF IV

since 1997 of release

Repair and car operation



Foltsvagen Golf 4
+ 1. Maintenance instruction
- 2. Engine
   + 2.1. Petrol engines
   - 2.2. Diesel engines
      2.2.1. Technical characteristics
      2.2.2. Bottom mudguard of a motor compartment
      2.2.3. Removal and installation of the power unit
      + 2.2.4. Gear belt
      2.2.5. Removal and installation of an inlet collector of the diesel SDI engine
      2.2.6. Compression check in engine cylinders
      2.2.7. Removal and installation of a poliklinovy belt
      2.2.8. Recommendations about engine oils
      2.2.9. Circulation of engine oil
      2.2.10. Check of pressure of oil and sensor of pressure of oil
      2.2.11. Removal and installation of the oil pallet
      2.2.12. Diagnostics of malfunctions of the diesel engine
      2.2.13. Main malfunctions of system of greasing
+ 3. Cooling system
+ 4. Fuel system
+ 5. Exhaust system
+ 6. Ventilation and heating system
+ 7. Coupling
+ 8. Transmission
+ 9. Suspension brackets and power shafts
+ 10. Steering
+ 11. Wheels and tires
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment and electroschemes




2.2.6. Compression check in engine cylinders

GENERAL INFORMATION

Check of a condition of the engine can be made by measurement of pressure of compression in engine cylinders. If this check to make regularly, it is possible to learn in advance the beginning of wear of the engine, without waiting the moment when wear of the engine will be shown in low overall performance of the engine.

PERFORMANCE ORDER
1. Warm up the engine to working temperature. Thus the accumulator should be completely charged.
2. Disconnect the electric socket from the valve of a stop of the engine.
3. Disconnect the electric socket from a flowmeter on the fuel pump.
4. Unscrew all glow plugs.
5. Instead of candles of an incandescence screw in a tester of measurement of pressure of compression with a flexible transitional hose.
6. Turn a cranked shaft of the engine a starter until the pressure fixed by the measuring device is stabilized. Make record of the received result.
7. Similarly check a compression in other cylinders.
8. Pressure of compression in all cylinders of petrol engines should not differ more than on 5,0 bar. Pay attention that the size of compression should increase quickly on the serviceable engine. Low pressure of compression on the first turn of the cranked shaft, accompanied by gradual increase in pressure on the subsequent turns of a cranked shaft, indicates wear of piston rings.
9. The low size of pressure on the first turn of a cranked shaft which slightly increases further, indicates a thinness of a prileganiye of the valves, the punched laying of a head of the block of cylinders or crack existence in a head of the block of cylinders. Wear of the ends of cores of valves can result in low pressure of compression also.
10. If pressure in one cylinder lowered, carry out the following tests. Fill in through a candle opening in the cylinder of a little engine oil and check pressure of compression.
11. If filling oil in the cylinder increases pressure of compression, it specifies that the cylinder or piston rings is worn-out.
12. Low pressure in two next cylinders indicates a laying burn-out between cylinders.
13. If pressure in one cylinder is less for 20 %, than in the others, and the engine works unstably idling, it indicates a worn-out cam of a camshaft.
14. If pressure of compression is too high, it specifies that the chamber of combustion is covered with a thick layer of a deposit.
15. Similarly check a compression in other cylinders.
16. Screw in glow plugs, having tightened them the moment of 15 Nanometers, and connect to candles the tire of giving of tension.
17. Connect all earlier removed electric sockets.