BMW 3: Chain tensioner

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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Concept
The system supports the driver in the following
situations:
When parking parallel to the road, parallel
parking.
When reverse parking diagonally to the road,
diagonal parking. The system orients itself
with the middle of the parking space during
diagonal parking.
When driving out of
Concept
The system helps to avoid imminent side collisions.
General information
Four radar sensors in the bumpers monitor the
space next to the vehicle from a minimum speed
of up to approx. 130 mph/210 km/h.
The minimum speed is country-specific and is
displayed in the menu for the intelligent Saf