Diagnostics of malfunctions of system of cooling. BMW the 5th E28/E34 series (from 1981 to 1993 of release) -
Repair of BMW E28 and series E34 from 1981 to 1993
1. Cars of the BMW brand of 5-series
2. Engine
3. Cooling system
3.1. General information
3.2. General information on antifreeze
3.3. Check of work and thermostat replacement
3.4. Removal and radiator installation
3.5. Work check, removal and installation of the fan of cooling of the engine and coupling of its drive
3.6. Check of operation of the water pump
3.7. Removal and installation of the water pump
3.8. Check of work and replacement of the sensor of a measuring instrument of temperature of a cooler
3.9. Diagnostics of malfunctions of system of cooling
4. Power supply system
5. Ignition system
6. Control systems of the engine and decrease in toxicity of the fulfilled gases
7. System of production of the fulfilled gases
8. Coupling
9. Manual box of gear shifting (RKPP) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
13. Body
14. Control body sizes
15. Heater and air conditioner
16. System of onboard electric equipment
17. Routine maintenance of the car
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and operation receptions
21. System of onboard diagnostics - a principle of functioning and codes of malfunctions
 








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3.9. Diagnostics of malfunctions of system of cooling

Symptom Possible reason
Overheat Level of cooling liquid fell in system (see. Head Routine maintenance of the car).
The driving belt of the water pump is faulty, or adjustment of effort of its tension (is broken see. Head Routine maintenance of the car).
Passableness of a radiator is broken or its lattice (is blocked see. Head cooling System).
The thermostat (is faulty see. Head cooling System).
The radiator cover (is damaged and does not hold pressure see. Head cooling System).
Installation of a corner of an advancing of ignition (is broken see. Head ignition System).
Overcooling The thermostat (is faulty see. Head cooling System).
External leakages of cooling liquid take place Hoses are damaged mechanically or as a result of material aging, or weakened fastening them collars (see. Heads Routine maintenance of the car and cooling System).
The epiploon of the water pump (is damaged see. Heads Routine maintenance of the car and cooling System).
The radiator, the heat exchanger of a heater or broad tank (is damaged see. Head cooling System).
Tightness of drain jams of the radiator/block of cylinders is broken, or vyzhimny jams of a water shirt of the block of the engine (are damaged see. Heads Engine and cooling System).
Internal leakages of cooling liquid take place Laying of a head of cylinders (is punched see. Head Engine). The head or the block of cylinders (are burst see. Head Engine).
There are losses of cooling liquid In system too much liquid (is filled in see. Head Routine maintenance of the car).
Occurs vykipany cooling liquid owing to an engine overheat.
External or internal leakages of cooling liquid (see above) take place. The radiator cover (is faulty see. Head cooling System).
Circulation of cooling liquid is broken The water pump (is faulty see. Head cooling System).
The cooling system (is blocked see. Heads Routine maintenance of the car and cooling System).
The driving belt of the water pump is faulty, or adjustment of effort of its tension (is broken see. Head Routine maintenance of the car).
The thermostat (is jammed see. Head cooling System).


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3.8. Check of work and replacement of the sensor of a measuring instrument of temperature of a cooler
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4. Power supply system