BMW 3 Owners & Service Manuals

BMW 3: Valve gear

VANOS

Valve gear
VANOS unit B46 engine and B46TU/B48TU engines

  1. VANOS B46 engine
  2. VANOS B46TU and B48TU engine

Following the changeover from a two-part chain drive to a single-part chain drive, the camshaft sprockets on the VANOS now have 46 teeth instead of the previous 36 teeth. To compensate for the additional weight of the larger camshaft sprockets, the adjuster was designed to be shorter and more compact. Additionally, the chain track was displaced by 1.5 mm.

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     Belt drive

    Comparison belt drive B46 engine and B46TU/B48TU engines B46 Engine (transverse installation shown) B46TU/B48TU engines (transverse installation shown) Deflecting element Alternator Coolant p

     Cooling System

     Split cooling

    Split cooling is a new development for the B46TU engine. This cooling concept is a modified version of which is already used in the N63TU2. The Split Cooling function uses the electrical Split Cooli

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     Operating via the Controller

    Opening the main menu Press the button. The main menu is displayed. Selecting a menu Selecting menu items 1. Turn the Controller until the desired menu item is highlighted. 2. Press the Controller. Select a widget 1. Move the Controller to the right. 2. Select a widget. 3. Press the Controller.

     Trunk lid

    Trunk lid and doors Depending on the vehicle equipment and country version, this setting may not be offered. Via iDrive: 1. "CAR". 2. "Settings". 3. "Key button settings". 4. Select the symbol. 5. Select the desired setting: "Tailgate" The trunk lid is opened. "Tailgate and door(s)" The t

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