E39 series BMW 5

since 1996-2001 of release

Repair and car operation

+ 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 impellent oil and oil filter
   Check and adjustment of turns of idling of the engine and level WITH
   Replacement of an element of the air filter
   Replacement of the filter of air of salon
   Check of brake system
   Visual control of the bottom and body elements
   Check of level of liquid of system of hydrostrengthening of a wheel
   Wheels and tires. Rotation, replacement, balancing and leaving. Snow chains. "Sekretki" of wheels. Elimination of trembling of a wheel
   Check of a condition and replacement of hoses of an impellent compartment
   Check of a condition of driving belts
   Check of a condition of the battery, care of it and charging. Replacement of an element of a food DU brelka
   Check and replacement of spark plugs
   Check of functioning of fuel system. Winter operation of the Diesel engine
   Check of functioning of system of cooling
   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
   Greasing of locking devices
   Visual check of seat belts
   Check of a condition and replacement of brushes of screen wipers
   Replacement of brake liquid
   Replacement of liquid of system of cooling. Check of frost resistance of a cooler. Visual check of system of cooling
   Sediment removal, replacement of the fuel filter. Air removal from fuel system of the diesel engine
   Replacement of transmission oil of a manual box of gear shifting
   Replacement of lubricant liquid of differential
   Check of thickness of a conducted disk of coupling
+ Engine
+ Systems of cooling, 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
+ electric equipment Schemes
+ System of onboard diagnostics

Check and replacement of spark plugs


1. Before the beginning of work prepare all necessary tools which include a replaceable head of a candle key of 16 mm and a set of edges щупа. 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 received in Specifications to Head engine Electric equipment.
3. Having near at hand new candles, let's to the engine cool down completely before the beginning of removal of the 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 a measuring instrument of the necessary thickness between electrodes on the candle end. The gap should correspond specified in Specifications. The delay should concern each of electrodes only. If the gap does not correspond to norm, slightly turn in the bent part of an electrode by means of a regulator with notches before achievement of necessary size of a gap.

At adjustment of a gap of a new candle turn in only the basis of an electrode of grounding, without touching its end. If the electrode of grounding is displaced rather central electrode, by means of a regulator with notches level them. Check a porcelain insulator on existence of the cracks specifying that it is necessary to replace a candle.

5. At the cooled engine remove ignition coils, address to the Section Removal and installation of the coil of ignition.
6. If there is such possibility, use the compressed air for blowing of dirt and particles of alien materials from area round spark plugs. It is possible to use for this purpose the ordinary bicycle pump. It becomes on purpose to avoid 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 counter-clockwise.
8. Compare the taken-out candle with shown in pictures in Head engine Electric equipment, it will give you useful information about the general condition of the engine.
   a) Gray color of electrodes and an insulator of average density - the correct work of a candle and an optimum working mix.
   b) Black color of electrodes and an insulator - a mix too rich.
   c) Light gray color of electrodes and an insulator - a mix too poor.
   d) Zamaslivaniye of electrodes and an insulator - candle work with interruptions or bad consolidation of piston rings (check a compression).
9. Check a candle insulator on existence of traces of currents of leak. Currents of leak are shown in the form of thin any traces on an insulator surface. Leaky contact of the tip of candles can be the reason of currents of leak. In this case it is necessary to replace shtekerny connection.
10. Put a little medsoderzhashchy 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 for a candle tightening a dinamometrichesky key to be sure that it is established correctly. The effort of a tightening of candles is included in Specifications.

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

11. Establish coils of ignition and an engine cover. Thus watch the correct connection of tips and connection with weight, address to 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.