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
+ Manual transmission and transmission a line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electric equipment schemes


Check of a condition and replacement of hoses of an impellent compartment

Replacement of hoses of a central air of air should be made on a car repair shop of representation branch or in a specialised workshop where there is an equipment for safe dump of pressure in system. Never disconnect hoses of system and do not remove its components, preliminary without having dumped pressure.

The general information

1 Influence of heats in an impellent compartment leads to gradual failure of the rubber and plastic hoses used in various systems. It is necessary to make regularly check of hoses on presence of cracks, easing of fastening of collars, hardening of materials and signs of leaks.
2 Information concerning hoses of system of cooling, is resulted more low in this Section, and in hoses of brake system - in Section of Check of brake system.
3 Majority of hoses (but not all) fasten by means of collars. There, where collars are used, check up reliability of their fastening providing absence of leaks. If collars are not used, make sure that the hose in a junction with the union was not inflated and-or has not hardened, supposing leaks.

Vacuum hoses

4 usually vacuum hoses especially applied in systems of decrease of toxicity of fulfilled gases, have colour marks or inserts from colour strips.

Various systems demand use of hoses with various thickness of walls, thermal stability and various resistance схлопыванию. At replacement of hoses watch that the material of a new hose corresponded to a material of the old.
5 often unique authentic way of check of a condition of a hose is its full removal from the car. At removal more than one hose takes care of accurate marks of hoses and unions to provide correct assemblage.
6 At check of vacuum hoses do not forget to check up T-shaped plastic connections also. Examine them on presence of cracks which can cause leaks.
7 For revealing of leaks of vacuum it is possible to take advantage of a small piece of a vacuum hose as a stethoscope. Press one end of a hose to an ear and hear another to all vacuum hoses and connections on presence of the characteristic hissing testifying to leak of vacuum.

Using a similar stethoscope, be cautious, do not suppose contact to moving components in an impellent compartment, such as driving a belt, the cooling fan, etc.


Fuel hoses

At survey or service of components of fuel system it is necessary to observe certain safety measures. All works make in well aired premise, do not suppose approach of open fire (for example, the lighted cigarettes) or the bulbs not protected by a lamp shade to a work place. The spilt fuel immediately collect rags which put then in a place where its spontaneous ignition is impossible. At fuel hit on a skin immediately wash off its plentiful quantity of water with soap. At work with fuel system it is necessary to use goggles and always to have near at hand the fire extinguisher.


8 Fuel hoses usually are under pressure, therefore at their detachment be ready to that fuel will be sprayed also it it is necessary to collect.

On the cars equipped with system of injection of fuel before to serve fuel hoses, it is necessary to dump pressure in system.


9 Check up all rubber fuel hoses on presence of signs of deterioration and attritions. Pay special attention on sites of a bend and in front of unions, for example a junction of a hose with the fuel pump or the filter, cracks there can be formed.
10 Use only high-quality fuel hoses. Never, under no circumstances do not use as fuel not reinforced vacuum hoses, transparent plastic tubes or water hoses.
11 For fastening of fuel hoses collars of tape type are usually used. These collars weaken in due course a tension and can "jump out" at removal. At replacement of hoses replace such collars with collars of screw type.

Metal lines

12 Between the fuel pump and system of injection of fuel sections of metal tubes are often inserted. Carefully check these tubes on presence of dents, twisting or cracks.
13 If it is necessary to replace section of a metal line, use only seamless steel tubes, since copper and aluminium tubes are insufficiently strong to resist to the vibrations caused by work of the engine.
14 Check metal brake lines in places of their connection with the main cylinder and with a regulator of pressure or ABS (if it is available) on presence of cracks or weakened choke connections. Any signs of leak of a brake liquid demand immediate careful survey of all brake system.

Hoses of system of hydrostrengthening of a wheel

15 Check up hoses of system of hydrostrengthening of a wheel on presence of signs of leak of the liquid, weakened choke connections and the worn out collars. It is necessary to replace proceeding hoses and the worn out collars.

Hoses of system of cooling

Leaks in cooling system are usually found out on white or colours of a rust to a touch in the area adjoining leak.

Carefully check up a radiator and hoses of a cooling liquid on all length. Replace hoses with cracks, ruptures and ageing signs. Cracks are easier for finding out if to press a hose. Will pay special attention on collars which attach hoses to elements of system of cooling. Collars of fastening of a hose which have been strongly tightened, can cause rupture or a hose puncture, leaks in cooling system will be result of that. Examine all hoses and surfaces of connection of hoses about leaks. If any problems of similar character with leaks replace this component or a lining are found out.


Detection of places of leaks

Fuel leaks precisely to define difficultly while leak does not become essential and, hence, easily visible. Fuel tends to evaporate quickly as soon as it contacts with air, especially in a hot impellent compartment. Small drops can disappear before you can define a leak place. If you suspect that leak of fuel in the field of an impellent compartment then cool the engine takes place and start it, while it cold, at an open cowl. Metal subjects are compressed at cooling, and rubber hoses tend to be weakened, so any leaks will be more obvious, while the engine heats up at start from a cold condition.

If there are signs that there is a leak of any liquid, but you cannot distinguish type of a liquid or an exact origin it is necessary to leave the car for long time and to put the big piece of a paper or a rag under the car. It will help to find a place of course of a liquid, and also will help to identify a liquid on colour. But keep in mind that some leaks can be shown only at the working engine.

Leak in a vacuum hose means that air is sucked in in a hose (instead of leaves a hose), and it does leak very difficult for detection. The detection method consists in using an old vacuum hose as some kind of a stethoscope. Hold one end of a hose close to an ear (but not in an ear), and other end use to investigate area round prospective leak. When the hose end will be directly over the leak place, the hissing sound will be clearly audible through a hose. It is necessary to avoid contact to hot and moving details as the engine at check should work.