BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
- Current leaving and service
   Schedule of routine maintenance
   Current leaving
   General information on control
   Check of levels of liquids
   Check of a condition of tires and pressure in them
   Replacement of motive oil and oil filter
   Check and adjustment of turns of idling of the engine and SO level
   Replacement of an element of the air filter
   Replacement of the filter of air of salon
   Check of the brake system
   Visual control of the bottom and elements of a body
   Check of level of liquid of system of hydrostrengthening of a wheel
   Wheels and tires. Rotation, replacement, balancing and leaving. Snow chains. Sekretka of wheels. Elimination of trembling of a wheel
   Check of a state and replacement of hoses of a motive compartment
   Check of a condition of driving belts
   Check of a condition of the battery, care of it and charging. Replacement of a battery DU brelka
   Check and replacement of spark plugs
   Check of functioning of fuel system. Winter operation of the Diesel
   Check of functioning of the cooling system
   Check of a condition of system of production of the fulfilled gases
   Check of a condition of components of a suspension bracket and steering
   Check of a condition of protective covers of power shafts
   Lubricant of locking devices
   Visual check of seat belts
   Check of a state and replacement of brushes of screen wipers
   Replacement of brake fluid
   Cooling system liquid replacement. Check of frost resistance of a cooler. Visual check of the cooling system
   Removal of a sediment, replacement of the fuel filter. Removal of air from fuel system of the diesel engine
   Replacement of gearbox oil of a manual box of gear shifting
   Replacement of lubricant liquid of differential
   Check of thickness of the conducted clutch plate
+ Engine
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
+ System of onboard diagnostics


Check of a condition of driving belts

Check of a state

Driving ridge belts, are in a forward part of the engine and play an important role in operation of the car and its separate components. Because of features of material and operating conditions driving belts fail after a while and therefore their state it is necessary to check and regulate periodically effort of a tension in order to avoid serious damages of the engine.

The quantity of the belts used on the concrete car depends from installed on it units and systems. Driving belts are applied to actuating of the generator, steering pump, water pump and the compressor of the air conditioning system. Depending on an arrangement of pulleys one belt can put in action several components at once.


1. Switch off the engine, open a cowl and find various driving belts in a forward part of the engine. Fingers (and using a small lamp if it is necessary) walk on all length of each belt, feeling them on existence of cracks and stratifications. Also check whether is not present on belts of attritions and sites, zapolirovanny to gloss. Each belt has to be examined on both sides that means need of its twisting for check of a condition of inner side.

2. The tension of a belt is checked by strong pressing for it by a thumb and definitions of degree of its deflection. Measure the size of a deflection by a ruler. The rule of a thumb says that if the distance between centers of pulleys makes from 180 to 280 mm, then the size of a deflection has to equal 6 mm. If the distance between centers of pulleys is in limits between 300 and 400 mm, deflection has to be 13 mm.
3. Wear of side surfaces: point of edges (V), at a new belt of an edge have the trapezoidal form.

4. The pulling branch of a belt is visible in the basis of edges. Is determined by lighter places.

5. Existence of cross cracks (D) on a reverse side of a belt.
6. Peeling of separate edges (E).

7. Razlokhmachivaniye of external plaits of a belt (F). Address an accompanying illustration.
8. Side having dug a plait (G).
9. Existence of cross cracks (H) in many edges.

10. Breaks of edges (J). Address an accompanying illustration.
11. Separate cross breaks of edges (K).

12. Deposits of dirt and stones between edges.
13. Rubber outgrowths in the basis of edges.
14. In the presence of one or several of the listed defects the belt has to be replaced, address the Section Removal, installation and a tension of a maple belt.
15. Check a belt for aging on existence of cracks. For the rest the belt does not need service.
Maple the belt stretches an automatic natyazhitel. It is not required to check a belt tension.