BMW 3 of the E46 series

since 1998 release

Repair and operation of the car

BMW 3 of the E46 series
+ BMW 3 Cars (E46)
- Current leaving and service
   Current leaving
   General information on control
   Check of levels of liquids
   Check of a condition of tires and pressure in them. Designation of tires and disks of wheels
   Replacement of motive oil and oil filter
   Replacement of the filtering element of the air filter
   Checks of brake system
   Replacement of an element of the filter of air of salon
   Check of a condition of driving ridge belts
   Check of a state and replacement of hoses of a motive compartment
   Check of functioning of the cooling system and frost resistance of cooling liquid
   Check of a condition of system of production of the fulfilled gases
   Check of level of oil in a manual box of gear shifting
   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 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
   Check of a state, replacement of brushes and adjustment of a corner of screen wipers
   Check of a condition of the battery, care of it and charging
   Replacement of brake fluid
   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 the battery of a key of remote control
+ Engine
+ Cooling systems, heating
+ Power supply systems, injection and release
+ Electric equipment of the engine
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment

Check of a condition of tires and pressure in them. Designation of tires and disks of wheels

Gate of tires

1 and 2 — rubber and metal
3 — the gate

4 — the gate case


1 BMW depending on model and equipment can have tires and disks of various sizes. All disks have depth of a press fitting of 45 mm. Depth of a press fitting is a distance from the middle of a rim to a persistent surface of a wheel on a brake disk or a drum.
Wheel bolts for steel and light-alloy wheels have the identical sizes.

At installation of light-alloy wheels of other producers bolts of other sizes can be demanded.

The equipment constantly develops. Can be so that for older models other values of pressure in tires are admissible. The sizes specified in documents to the car are defining.

2 At a sports manner of driving it is recommended to increase pressure in lobbies and back tires by 0.2 bars. At increase in pressure it is necessary to proceed from a base-line value for various conditions of loading.
3 Winter tires as a rule have pressure upon 0.2 bars above than summer. It is necessary to consider recommendations of manufacturers of winter tires.
4 As winter tires have restriction on speed, in sight of the driver the plate with the indication of the maximum speed has to be strengthened.

Designation of disks

Example 6 J x 15:
6 width of a rim in inches.
J alphabetic reference of height and contour of an onboard zakraina of a rim.
x designation of a unicomponent deep rim.
15 diameter of a disk in inches.

BMW can be equipped with tires and disks of various sizes. However use of disks with press fitting depth only of 45 mm is allowed. Depth of a press fitting is a distance from the middle of a rim to a persistent surface of a wheel on a brake disk or a drum.

Admissible lateral beating on the onboard zakrayena of a rim: 1.2 mm.

Admissible vertical beating on the landing shelf of a rim: 0.8 mm.

Designation of tires

Example: 195/70 R14 89H
195 width of the tire in mm.
/70 height relation to width (height of cross section of the tire makes 70% of width).
If hotel data on width relation to height are absent (for example, 175 R 14), means it is about the "normal" relation. It makes 82%.
R radial design.
14 size of a rim in inches.
89 parameter of loading capacity.
N class of speed, N: to 210 km/h (on new tires it is brought not always).

if between data 14 and 89 there is a designation of M+S, it is about tires with a winter protector.

The letter of speed stands behind the tire size. Symbols of speed belong both to summer, and to winter tires, address to Specifications.

Date of production of the tire

Date of production of the tire is specified on the tire in a code of the producer

DOT Departament of Transporation (Ministry of Transport of the USA).
CU reduction of the name of the manufacturer.
L2 tire size.
UM8 execution of the tire.
01 dates of production - the 01st working week 1999.
TUBELESS tubeless (TUBETYPE - the tire with a chamber).

5 Regular check of a condition of tires will allow you to avoid the troubles connected with stops in way because of the lowered wheel. Besides, such checks give valuable information on possible problems with a steering and a suspension bracket before emergence in them serious damages.

6 Sheena are equipped with the built-in strips of indication of wear of a protector which are bared at decrease in depth of a protector to 1.6 mm then tires are considered as the worn-out. This size represents minimum admissible depth of a protector; it is in most cases recommended to replace tires, which depth of a protector of 2 mm and less. Depth of a protector can also be determined by the simple and inexpensive adaptation known under the name of the measuring instrument of depth of a protector.

7 Pay attention to any unusual wear of protectors. Such defects of a protector as cavities, cambers, flattening and stronger wear on the one hand indicate violation of corners of installation of forward wheels and/or balancing of a wheel. At identification any of the listed defects it is necessary to address for their adjustment in a tire workshop.
8 Carefully check the tire for existence of cuts, punctures and the got stuck nails or buttons. Sometimes after piercing of the tire a nail it still some time holds pressure or lowers very slowly.

At suspicion such "a slow puncture" at first check tightness of a nipple of the gate of a rating for existence. Then examine a protector on presence at it of the got stuck strangers of the subjects or the punctures which are closed up earlier which started over again to pass air. If there is a suspicion that there is a puncture, it is possible to make sure of its existence, having moistened the suspected site with soap water. In the presence of leak solution will start bubbling. If a puncture not too big, the tire it is usually possible to repair in any tire workshop.
9 Carefully examine internal lateral surfaces of tires on existence of signs of leak of brake fluid on them. If those are available, immediately check brake system.
10 Maintenance in tires of the correct pressure increases the term of their service, helps to save fuel and improves comfort of the movement. The special manometer is necessary for check of pressure.

Always keep the exact manometer in the ware box. Indications of the manometers which are built in nozzles of air hoses at stations of service often happen inexact.

11 Always check pressure on cold tires (i.e. to a trip on the car). If to check pressure on the warm or warmed tires, it will lead to overestimate of indications of the manometer because of thermal expansion of tires. In this case it is never necessary to lower pressure since after cooling of the tire it will be lower than norm.
12 Screw together a protective cap from the gate of a rating acting from a disk of a wheel or from a nave cap then densely press a manometer nozzle to the gate. Consider instrument readings and compare them with recommended in Specifications. Do not forget to install into place a protective cap for prevention of hit in the mechanism of a nipple of dirt and moisture. Check pressure in all four tires and if necessary pump up them to the recommended value of pressure.

13 do not forget to support the demanded pressure and in a spare wheel.

Check of pressure of air in tires

14 Inspection of pressure of air should be carried out only on cold tires.
15 Turn off a gate cap.
16 Air pressure in tires is checked once a month, and also when carrying out service (including spare a wheel).
17 Besides, pressure of air need to be checked before each long trip since in this case temperature load of tires increases.
18 Necessary pressure of air in tires is given in the sticker which is on inside of a cover of a fuel tank.

At use of winter tires pressure of air has to be increased by 0.2 bars in relation to the established value.

19 Pressure of air of narrow tires of a spare wheel is specified on a disk sidewall.
20 The car can be equipped with pressure monitoring system in tires (RDC - Reifen-Druck-Control). The system watches air pressure, both on the motionless car, and at the movement and considers thus the speed and external temperature. For this purpose in each wheel, including spare, the transferring block with the sensor of pressure and temperature which is powered from the lithium battery with service life five years is installed. The transmitter transmits a signal to the reception antenna in a wheel arch which is connected with the onboard processor. Thanks to existence of RDC, in particular, dangerous ruptures of tires which arise owing to work of deformation of the tire as a result of the low pressure of air can be excluded.

Check of the gate of tires

The used extenders of gates have to be checked for existence of the damages and pollution conducting to leakage. If necessary extenders should be replaced.

21 Turn off a protective cap and the extender.
22 Apply a small amount of soap solution or a saliva on the gate. If the air bubble is formed, tighten an insert the 3rd protective cap 2.

It is necessary to apply only a protective cap to pulling up of the gate 2. 1 rubber protective caps, 4th gate.

23 Again check the gate. If there are bubbles and the gate does not manage to be tightened, it should be replaced (work HUNDRED).
24 Surely again establish into place a protective cap.

Examples of characteristic wear of protectors of tires

Lateral wear


Insufficient pressure in the tire leads to its overheat at the movement owing to an excessive deflection therefore the protector does not nestle sufficiently on a road surface. It leads to loss of coupling with the road and to excessive wear of a protector, not to mention danger of an exit of the tire out of operation as a result of an overheat.

Check and adjust pressure.

Wrong disorder of wheels (wear on the one hand)

Repair or replace suspension bracket details.

Too sharp turns

Reduce speed!

Central wear


Excessive pressure

Excessive pressure in the tire results in the accelerated wear of the central part of a protector, decrease in coupling with the road, more rigid movement and
to increase of danger of fatal damage of a slope.

Check and adjust pressure.

If you had to pump up tires for transportation of heavy freights to the value of pressure specified for this purpose in Specifications, do not forget after that to pit it upon transition to the normal mode of operation.

Uneven wear


Tires of forward wheels can unevenly wear out as a result of violation of adjustment of corners of installation of wheels. It is possible to check and adjust installation corners for a moderate payment in the majority of tire workshops.

Wrong disorder or vybeg

Repair or replace suspension bracket details.

Defect of a suspension bracket

Repair or replace suspension bracket details.

Wheels are debalanced

Make balancing of wheels.

Convergence of forward wheels is incorrectly established

Adjust corners of installation of forward wheels.

The Obtrepannost of edges of a pattern of a protector which is a wear sign best of all comes to light to the touch.