E39 series BMW 5

since 1996-2001 of release

Repair and car operation



E39 BMW
+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply system and release
- Engine electric equipment
   + ignition System
   - System of preheat of the diesel engine
      Check, removal and installation of candles of an incandescence
      Check, removal and installation of the relay of preheat
   + charge and start Systems
+ 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


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System of preheat of the diesel engine

General description

At low temperature of the engine fuel spontaneous ignition at the expense of high extent of compression appears impossible. Therefore the additional heating of fuel is required.

For this purpose the glow plug is rolled in each chamber of combustion. The candle consists of the case with the heating core pressed in it. When giving on a tension candle the heating element within several seconds heats up to temperature from above 850°С that provides preparation of the engine for start during no more than 5 pages. After switching off of a control lamp of heating on the dashboard the engine is ready to start.

Duration of process of heating and additional automatic heating after engine start (to 20 c) it is regulated by the DDE block via the relay of preliminary heating. The scheme of preliminary heating is provided in the Management end.