BMW 3 Series E46

since 1998 release

Repair and operation of the car

BMW 3 Series E46
+ 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 the 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
+ Engine electric equipment
+ 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 and replacement of spark plugs

Tools necessary at replacement of spark plugs

1 — the Candle head - Is equipped with the special elastic insert excluding a possibility of casual damage of the porcelain insulator at a candle reversing.
2 — the Dynamometer key - without being among obligatory tools, provides a reliable guarantee of correctness of effort of tightening of spark plugs.
3 — the Ratchet drive - Is used in a set with a candle head and a dynamometer key.

4 — the Extender - Depending on model and a complete set access to spark plugs can be limited by its auxiliary units in various degree therefore use of extenders of the corresponding form and design will allow to facilitate implementation of the procedure considerably.
5 — the Device for measurement and correction of interelectrode gaps of spark plugs - Is issued several types of this sort of tools - make sure that the tool is completed with the probe corresponding by the size to gaps of candles of your car.

1 Before work prepare all necessary tools which include a replaceable head of a candle key and a set of edges of the probe. Some producers of spark plugs deliver special tools for measurement of a candle gap.
2 The best way of replacement of spark plugs is preliminary purchase of new candles, adjustment of their gap and replacement of each candle in turn. Upon purchase of candles it is very important to choose those candles which are intended for the engine of your car. Information on them can be obtained in Specifications.
3 Having near at hand new candles, let's the engine cool down completely before removal of old. During this time it is possible to examine new candles on existence in them of defects and to check candle gaps.

4 The candle gap is checked by insertion of the measuring instrument of the necessary thickness between electrodes on the end of a candle. The gap has to correspond specified in Specifications. The delay has to concern each of electrodes only. If the gap does not meet standard, slightly turn in a curved part of an electrode by means of the regulator with notches before achievement of necessary size of a gap.

At adjustment of a gap of a new candle turn in only the weight electrode basis, without touching its end. If the electrode of weight is displaced rather central electrode, by means of the regulator with notches level them. Check the porcelain insulator for existence of the cracks indicating that, the candle should be replaced.

Replacement of candles should be made only on cold or slightly warm engine. If candles are turned out on the hot engine, the carving in openings of the head of cylinders made of light metal can be damaged.

5 Switch off ignition.
6 Engines 316i, 318i: Rasstykuyte the socket of candles in the vertical direction. At the same time it is necessary to pull up for a cable, but not for the plug.

Engines 320i, 323i, 328i

7 Remove an element of the air filter of ventilation of salon of system of heating and the conditioner, address the Section Replacement of an Element of the Filter of Air of Salon.

8 Disconnect cable channel at the lower part of the case of the filter-2-, having opened clips and take out a cable.

9 Turn out screws-1 the T30 Torx screw-driver and remove the lower part of a vozdukhosborny box-2-.
10 Remove an opening stopper for an oil flood.

11 Hook the screw-driver and uncover fastening bolts (an arrow on an accompanying illustration), turn out two bolts which are under them.

12 Rasstykuyte the socket of each coil of ignition for what pull for plugs up.

13 Turn off fastening bolts at each coil of ignition, carefully take out coils.

Pay attention to tapes of grounding of a cover of a head of cylinders at coils of cylinders 1 and 6. At installation they have to be fixed on the former places again.

14 If it is possible, blow compressed air of a niche of spark plugs that dirt did not get to openings of cylinders.
15 Turn out candles the corresponding candle key. At the same time you watch that the key did not warp as it can lead to damage of the ceramic insulator.


16 Check a condition of spark plugs. Compare the taken-out candle with shown in pictures in the Section of System of a charge and start, it will give you useful information about the general condition of the engine. The greasy candle indicates interruptions in its work or bad consolidation of piston rings. It is possible to check existence of mechanical defect of a candle by means of a kompressometr, address appropriate section.


17 Screw spark plugs by hand by means of a candle key to a prileganiye to a head of cylinders. Attention: You watch to warping a candle.
18 Tighten candles the moment of 25 N • m.

At the same time do not warp a key not to damage the ceramic insulator.

If the dynamometer key is unavailable, tighten new spark plugs on a corner 90 ° (1/4 turns). The candles which were in the use should be tightened only on a corner 15 °.

19 Engines 316i, 318i: Put on the plug each candle. The plug has to be fixed distinctly. Do not confuse plugs, they are numbered, and the first cylinder is in front in the direction of the movement.

Engines 320i, 323i, 328i

20 Put on ignition coils candles and fix them. Fix plugs on coils brackets. Fix tapes of grounding on coils of ignition of cylinders 1 and 6.

21 Fix the tire of mass of a-3-connecting plate of coils to a forward bolt of the coil of ignition. The tire of mass of the-1-cable mine has to be connected by bolts to a connecting plate of-2 spark plugs.

22 Fix by bolts an engine cover.
23 Screw an oil flood mouth cover.
24 Fix the lower part of a vozdukhosborny box.
25 Lay a cable in cable channel at the lower part of a vozdukhosborny box. Close cable channel.
26 Install into place an air filter element systems of heating and the conditioner, address the Section Replacement of an Element of the Filter of Air of Salon.

Restoration of a carving of spark plugs

In the presence of damages of a carving under spark plugs it needs to be restored. For this purpose there is the corresponding tool and a repair kit, for example, of BERU. The special drill drills an old carving for what it is not necessary to remove a head of cylinders. Then in a head the new carving is cut and the candle with a special carving insert is rolled. The insert sits reliably and hermetically.