BMW 3: Valve gear
VANOS
VANOS unit B46 engine and B46TU/B48TU engines
- VANOS B46 engine
- 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
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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Manual Speed Limiter
Concept
The system can be used to set a speed limit, for
instance to prevent the vehicle from exceeding
speed limits.
General information
The system can limit the speed, starting at a
value of 20 mph/30 km/h. The vehicle can be
driven at any speed below the set speed limit.
Overview
Buttons on the s
Date
Setting the date
Via iDrive:
1. "CAR".
2. "Settings".
3. "General settings".
4. "Date and time".
5. "Date:".
6. Turn the Controller until the desired day is
displayed.
7. Press the Controller.
8. Make the settings for the month and year.
9. "OK".
Setting the date format
Via iDrive:
1. "CAR".
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