BMW 3: Chain tensioner
![Crankshaft drive](images/books/3376/index.12.png)
Chain tensioner
- Tensioning rail
- Sealing sleeve
- Chain tensioner with screw thread
Due to the cylinder head manufacturing process, the chain tensioner now has a
sealing sleeve with a
height of 12.5 mm instead of a sealing ring.
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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
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
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Buttons on the steering wheel
With steering and traffic jam
assistant:
Cruise control on/off.
With steering and traffic jam
assistant:
Select function.
Without steering and traffic jam
assistant:
Cruise control on/off.
Store current speed.
Speed Limit Assist: take over suggested
speed manual
Connections, electrical machine
Transmission bell housing
Temperature sensor
Coolant ducts
Connection for coolant (transmission oil)
Electrical connection, rotor position sensor
High-voltage connection
There are four connections of the electrical machine on the housing of the
automatic tra