Audi A4 with 2001- 2005 of release.
1. Operation and car maintenance service
2. The engine
2.1. The general data
2.2. Predvaritlnye checks
2.3. A Mehanichsky part (petrol engines 2,0л)
2.4. Greasing system
2.5. Cooling system
2.5.1. Removal and installation of the thermostat of system of the cooling operated on algorithm
2.5.2. Check of the thermostat of system of the cooling operated on algorithm
2.5.3. Removal and installation of the water pump
2.5.4. Опрессовка cooling systems
2.6. Injection system
2.7. System of release of the fulfilled gases
2.8. A mechanical part (petrol engines 3,0; 3,2)
2.9. A mechanical part (petrol engines 4,2)
2.10. A mechanical part (diesel engines 2,0)
2.11. Tables
3. Transmission
4. A running gear
5. The steering mechanism
6. Brake system
7. An onboard electric equipment
8. A body
9. Electric equipment schemes
 







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2.5.2. Check of the thermostat of system of the cooling operated on algorithm

Remove the thermostat of system of the cooling operated on algorithm.

Fig. 2.212. The big plate of the valve of the thermostat


Check up the thermostat in a cold condition. The big plate of the valve should adjoin densely on all circle to a connecting flange (fig. 2.212).
If it not so, replace the thermostat of system of cooling.

Fig. 2.213. Check of a valve stroke of the thermostat


Connect thermostat contacts by auxiliary wires from a set of auxiliary measuring means with АКБ. Keeping pincers, lower it to a flange vertically in a pan with a boiling cooling liquid (mixing proportions: 50 % G12 +) (fig. 2.213).

ATTENTION
Do not touch metal parts of the thermostat as they heat up.

The resistive heater in addition heats up wax in the thermostat.
Check up, whether 10 mines the minimum course in 7 mm are reached later.
If the minimum course in 7 mm is not reached, disconnect giving of pressure from АКБ.

THE NOTE
The given check cannot be made on air. In this case strain gauge damage is not excluded.


2.5.1. Removal and installation of the thermostat of system of the cooling operated on algorithm

2.5.3. Removal and installation of the water pump