BMW:: 5th E28/E34 series:: Check of functioning of the cooling system

1. Cars of the BMW 5-brand of a series
2. Engine
3. Cooling system
4. Power supply system
5. System of ignition
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 (MBGS) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
13. Body
14. Control body sizes
15. Heater and conditioner of air
16. System of onboard electric equipment
17. Routine maintenance of the car
- 17.1. Schedule of routine maintenance
- 17.2. Introduction
- 17.3. Current leaving
- 17.4. General information on control
- 17.5. Check of levels of liquids
- 17.6. Check of a condition of tires and pressure in them
- 17.7. Replacement of motive oil and oil filter
- 17.8. Check of level of liquid of system of hydrostrengthening of a wheel
- 17.9. Check of level of lubricant liquid of automatic transmission
- 17:10. Rotation of wheels
- 17:11. Check of a state and replacement of hoses of a motive compartment
- 17:12. Check of a state, adjustment of a tension and replacement of driving belts
- 17:13. Check and adjustment of turns of idling of the engine and SO level
- 17:14. Check of a condition of the battery, care of it and charging
- 17:15. Check and replacement of spark plugs
- 17:16. Check and replacement of candle VV of wires, cover and runner of the distributor
- 17:17. Check of level of oil in a manual box of gear shifting
- 17:18. Check of level of lubricant liquid of differential
- 17:19. Check and adjustment of gaps of valves
- 17:20. Check and lubricant of draft of the drive of a butterfly valve
- 17:21. Replacement of the air filter
- 17:22. Check of fuel system
- 17:23. Check of functioning of the cooling system
- 17:24. Check of a condition of system of production of the fulfilled gases
- 17:25. Check of a condition of components of a suspension bracket and steering
- 17:26. Check of a condition of protective covers of power shafts
- 17:27. Check of the brake system
- 17:28. Check of a state and replacement of brushes of screen wipers
- 17:29. Replacement of transmission liquid and AT filter
- 17:30. Discharge, washing and filling of the cooling system
- 17:31. Replacement of the fuel filter
- 17:32. Replacement of gearbox oil of manual transmission
- 17:33. Replacement of lubricant liquid of differential
- 17:34. Check of functioning of system of catching of vapors of gasoline (EVAP)
- 17:35. Control of an alarm lamp of the notification about approach of the term of planned maintenance (TPM)
- 17:36. Replacement of a distributive belt of the engine
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and methods of operation
21. System of onboard diagnostics - the principle of functioning and codes of malfunctions

17:23. Check of functioning of the cooling system

Annually or each 20 000 km of a run

Many serious violations in operation of the engine are connected with malfunctions of the cooling system. If the car is equipped with automatic transmission, then its functioning and service life are also directly connected with operation of the cooling system.

Check of the cooling system has to be made at the cold engine therefore it is better to be engaged in it before a trip, the first for the present day, or not earlier than in three hours after switching off of the engine.

PERFORMANCE ORDER

Slowly, being careful in case the engine yet not absolutely cooled down, uncover a radiator. Carefully wash out it clear water from within and outside. Also wash out a jellied mouth of a radiator. Existence of traces of corrosion in a jellied mouth means that the cooler should be replaced (see the Section Plums, washing and filling of the cooling system). The cooler in a radiator has to be rather pure and transparent. If it has brownish color, drain system and fill in in it a new cooler.

Carefully check radiator hoses, and also heater hoses which have smaller diameter. Check cooling system hoses on all length, making replacement of any burst, blown up or worn-out hose. It is easier to find cracks if to squeeze a hose a hand. Pay special attention to the collars holding hoses on cooling system components. These collars can cut or pierce hoses that will lead to leakage of a cooler.

Make sure of reliability of fastening of all hose connections. Leakages of a cooler are usually shown in the form of white or rusty color of deposits in the field of sealing violation. If on your car collars of wire type are used, then it is possible, there is a sense to replace them with collars of screw type.
By means of compressed air or a soft brush clear a forward part of a radiator (and also the air conditioner condenser where it is available). Remove all insects, the leaves and other foreign objects which got on radiator edges. Be very careful not to injure an edge and not to cut about them fingers.
If cooler level constantly falls, and you did not find any leaks, it is necessary to make check by pressure of a cover of a radiator and all cooling system.