E39 series BMW 5

since 1996-2001 of release

Repair and car operation

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
- Power supply system and release
   + Power supply system
   - System of injection of the petrol engine
      Memory of malfunctions
      Security measures and rules of observance of purity at work with injection system
      Work of system of injection
      Check of systems of ignition and injection
      Adjustment of a drive of gas
      Removal and installation of a branch pipe of a butterfly valve
      Removal, check and installation of the valve of adjustment of idling
      Check, removal and installation of the sensor of temperature
      Check of injectors
      Removal and installation of injectors
   + Power supply system of the diesel engine
   + System of production of the fulfilled gases
+ 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 of injectors

Injectors submit fuel impulsno. Thus injection has a konusny form. After the completion of injection the gate of an injector is densely closed. The leakage of injectors leads to difficulties at start of the heated-up engine. Faulty injectors lead to operation of the engine for some time after its switching off and lead to interruptions.


1. Uncover injectors.
2. Start the engine on single turns.
3. On the working engine a stethoscope hear to each injector. Gates of injectors should click when opening and closing.
4. If the stethoscope is not present, it is possible to put a screw-driver or a finger.
5. If unusual noise or absence it is found, it is necessary to check tension, resistance and tightness of injectors.

Check of tension and resistance of injectors


1. Check tension. For this purpose расстыкуйте shtekerny connection of injectors also attach a diode control lamp between contacts of wires of a food. Include a starter. The light-emitting diode should blink.
2. If the diode does not blink, the wire breakage or malfunction of the control unit can be the reason.
3. Switch off ignition.
4. Attach an ohmmeter between both contacts on each injector and measure resistance. If resistance differs from set, replace an injector. Resistance should be 15 — 17.5 Ohm.
5. If necessary replace a faulty injector.

Tightness check


1. Remove injectors. Toplivoprovoda do not disconnect from the distributive highway.
2. Attach a plug to injectors.
3. Lower injectors in capacity.
4. Ask the assistant some seconds to press a starter. Compare nature of injection of injectors among themselves. All injectors should have a cone-shaped injection and identical.
5. Switch off ignition.
6. Disconnect a plug level of injectors.
7. Include on 5 about ignition, without including a starter. Check tightness: within one minute one drop, should be formed no more.
8. Establish injectors.

On HUNDRED BMW firms tightness is checked by the compressed air. Not tight injectors are processed in the ultrasonic device of cleaning by means of a cleaner.