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 and replacement of spark plugs


1. Before work prepare all necessary tools which include a replaceable head of a candle key of 16 mm and a set of edges of the probe. Some producers of spark plugs deliver special tools for measurement of a candle gap. The spark plugs applied on BMW are given in Specifications.
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 to the Head Elektrooborudovaniye of the engine.
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 grounding electrode basis, without touching its end. If the electrode of grounding 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.

5. At the cooled engine remove ignition coils, address the Section Removal and installation of the coil of ignition.
6. If there is such opportunity, use compressed air for blowing of dirt and particles of alien materials from area around spark plugs. It is possible to use for this purpose the ordinary bicycle pump. It becomes with the purpose to avoid a possibility of hit of garbage in the cylinder after extraction of candles.
7. Establish a head of a candle key on a candle and remove a candle from the engine, having unscrewed it counterclockwise.
8. Compare the taken-out candle with shown in pictures in the Head Elektrooborudovaniye of the engine, it will give you useful information about the general condition of the engine.
   a) Gray color of electrodes and the insulator of average density - the correct work of a candle and optimum working mix.
   b) Black color of electrodes and the insulator - mix too rich.
   c) Light gray color of electrodes and the insulator - mix too poor.
   d) Oiling of electrodes and the insulator - work of a candle with interruptions or bad consolidation of piston rings (check a compression).
9. Check the insulator of a candle for existence of traces of currents of leak. Currents of leak are shown in the form of thin any traces on the surface of the insulator. The leaky contact of the plug of candles can be the cause of currents of leak. In this case shtekerny connection needs to be replaced.
10. Apply a little cupriferous anti-taking structure on a carving of a new candle. Insert a candle into a head of cylinders and screw it fingers against the stop, then tighten by means of a head of a candle key. If it is possible, use a dynamometer key for tightening of a candle to be sure that it is established correctly. The effort of tightening of candles is included in Specifications.

In order to avoid a possibility of a vvinchivaniye of a candle not on a carving put on a small piece of a rubber hose or a plastic tube its shaft. The flexible tube will work as universal - the cardan hinge, providing alignment of a candle in relation to a candle nest and in case the candle begins to warp, the hose will slip on it, without giving the chance to strip a thread.

11. Install coils of ignition and a cover of the engine. At the same time you monitor the correct connection of plugs and connection with weight, address the Section Removal and installation of the coil of ignition.
12. Repeat the procedure described above for other spark plugs consistently to avoid the wrong connection.