BMW 3 series E46

Since 1998 of release

Repair and car operation



The BMW of 3 series Е46
+ Cars BMW 3 (Е46)
- Current leaving and service
   Introduction
   Current leaving
   The general information on adjustment
   Check of levels of liquids
   Check of a condition of tyres and pressure in them. A designation of tyres and disks of wheels
   Replacement of impellent oil and the oil filter
   Replacement of a filtering element of the air filter
   Checks of brake system
   Replacement of an element of the filter of air of salon
   Condition check приводных ridge belts
   Check of a condition and replacement of hoses of an impellent compartment
   Check of functioning of system of cooling and frost resistance of a cooling liquid
   Check of a condition of system of release of the fulfilled gases
   Check of level of oil in a manual box of a gear change
   Check of a condition of components of a suspension bracket and steering
   Check of a condition of protective covers of power shafts
   Check of level of a liquid of system of hydrostrengthening of a wheel
   Visual check of a body and its bottom
   Check of seat belts
   Rotation and replacement of wheels
   Condition check, replacement of brushes and adjustment of a corner of screen wipers
   Check of a condition of the battery, care it and gymnastics
   Replacement of a brake liquid
   Check and replacement of spark plugs
   Check of fuel system, replacement of the fuel filter. Operation of diesel model in the conditions of winter
   Greasing of loops and locks of doors
   Replacement of a battery of a key of remote control
+ The engine
+ Systems of cooling, heating
+ Power supply systems, injection and release
+ Engine electric equipment
+ РКПП and трансмиссионная a line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electric equipment schemes


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Checks of brake system

The dust formed as a result of deterioration of overlays and accumulating on components of the brake mechanism, can contain hazardous to health asbestos. Do not blow this dust by means of compressed air and do not inhale it! Do not use solvents on the basis of gasoline for dust removal. The dust should be washed off a special cleaner of brake system or methyl spirit in drain capacity. After rubbing of components of brake system by a damp rag this rag and contents of drain capacity should be held in the closed and signed container. Further whenever possible try to use components not containing asbestos.

Except checks through the established intervals of time a condition of brake mechanisms it is necessary to spend each time at removal of wheels or at occurrence of signs of malfunction in system. For driving safety the checks of brake system described below procedure are most important of all procedures made by you on car service.


Signs of malfunctions in brake system

1 Disk brake mechanisms can have the built in indicators of deterioration of frictional overlays which signal that deterioration of overlays has reached critical size. Thus overlays should be changed immediately, differently brake disks will be damaged also by it expensive repair is required.
2 Any of listed below signs can specify in potential defect of brake system:

a) At squeezing of a pedal of a brake the car "withdraws" in one party
b) Brake mechanisms at braking publish scraping or squealing sounds
c) the brake Pedal has an excessive course
d) the brake Pedal pulses (it normally only at system ABS work)
e) leaks of a brake liquid (usually on a tyre or wheel inside) Are observed
3 In case of detection at least one of these signs immediately examine brake system.

Brake lines and hoses

In brake system basically steel brake tubes, except for the flexible reinforced hoses at forward wheels and as connections at the back bridge are used. Regular survey of all these lines is very important.


4 Park the car on an equal platform and switch off the engine. Remove caps from wheels. Ослабьте, but do not remove bolts of fastening of all four wheels.
5 Poddomkratte the car and reliably establish it on support.
6 Remove wheels (address to Section Rotation and replacement of wheels).
7 Check up all brake lines and hoses on presence of cracks and attritions in their external covering, leaks, swellings and deformations. Check up brake hoses in forward and back parts of the car on presence of signs of a softening, cracks, deformations or deterioration as a result of a friction about other components. Check up all штуцерные connections on presence of signs of leaks and make sure of reliability of fastening of all bolts and clips of brake hoses.

8 Bend hands in one and other parties a brake hose to reveal damages. To braid hoses does not follow. Watch a direction of the colour line put on a hose.


9 Turn a steering wheel to the right and to the left against the stop. Hoses should not touch elements of a design of the car thus.
10 At detection of leaks of a liquid or their damages it is necessary to eliminate immediately. For more detailed description of procedure of repair of brake system address to the Head Brake system.

Check of a thickness brake колодок


At deterioration brake колодок forward and back brakes on the panel of devices the signalling device lights up. Thus it is necessary to replace urgently brake колодки.

Operation of lifting and car installation on supports is connected with danger! Therefore before operation carrying out familiarise with Razdelom Poddomkrachivanie and towage


11 Mark a paint position of wheels concerning a nave. It will allow to establish at assemblage отбалансированные wheels in their former position. Ослабьте bolts of fastening of wheels on the car standing on the earth. Lift the car, put it on supports and remove wheels.

Disk brake mechanisms

12 Check up visually a thickness колодок without a metal plate, looking from above through a support.

13 In addition check up sideways a thickness external колодки. A deterioration limit колодок forward and back brakes will reach, if the thickness колодки makes 3 mm.


14 In doubtful cases remove колодки and measure a thickness by a calliper. At achievement of a limit of deterioration колодки it is necessary to replace. Thus it is necessary to replace all four колодки one axis even if a deterioration limit one has reached only колодка.

On the basis of experience it is known that 1 mm of deterioration колодки a disk brake corresponds 1000 km of run. It corresponds to adverse service conditions. At normal operation of the car service life колодок much more. At a thickness колодки in 5.0 mm (without подкладной plates) колодка can be still used for run of 2000 km.


15 Check up, whether has a support of traces of leaks of a brake liquid. At presence негерметичности urgently hand over a support in repair.
16 Visually check up brake disks from the internal and external parties on presence задиров, corrosion damages and cracks. If necessary replace disks.

Lay brake

17 Kolodki of a lay brake can be checked up visually after removal of a disk of a working brake. A deterioration limit will reach, if the thickness колодки in the most thin place makes 1.5 mm.


18 If a deterioration limit will reach, колодки it is necessary to replace. Necessarily replace all колодки one axis, address to Section Removal and installation колодок a lay brake.
19 Establish wheels so that the marks put at removal have coincided. Preliminary grease with a thin layer подшипниковой greasings aligning belt of a disk of a wheel on a nave. Bolts of fastening of a wheel do not grease. It is necessary to replace rusty bolts. Establish wheels and wrap fastening bolts. Lower the car on wheels and tighten bolts cross-wise the moment 100 Н•м.

Check of functioning of a lay brake

The lay brake represents a drum-type brake with тросовым a drive. The drum is built in disks of a back brake. As deterioration brake колодки a lay brake is insignificant, corrosion damage or pollution brake колодок can take place. Therefore before check of a lay brake it is recommended to earn extra it as follows:

20 Smoothly brake the car a lay brake since speed of 40 km/hour in deserted street or a parking platform so. Without changing speed, tighten a lay brake on one tooth and pass 400 more m. Release a brake and allow to it to be cooled.

Operation of lifting and car installation on supports is connected with danger! Therefore before operation carrying out familiarise with Razdelom Poddomkrachivanie and towage


21 Lift and establish on supports a back part of the car. Wheels should be over the earth at height not less than 2 see
22 Tighten a lay brake on one click and turn back wheels. Wheels should be turned freely, brakes should not work.
23 At brake raising on 10 clicks of a wheel should затормаживаться completely.
24 Otherwise adjust a lay brake, address to Section Adjustment of a lay brake.
25 Lower the car on wheels.