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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     Programmable memory buttons

    General information The iDrive functions can be stored on the programmable memory buttons and called up directly, for instance radio stations, navigation destinations, phone numbers and menu entries or pages in the Integrated Owner's Manual. Settings are stored for the driver profile currently used.

     In the vicinity of the center console

    Control Display Hazard warning system Intelligent Safety Ventilation Glove compartment Automatic climate control Radio/multimedia, see Owner's Manual for Navigation, Entertainment, and Communication Controller with buttons Parking brake Automatic Hold Driving Dynamics Control SPO

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