BMW 3: Chain tensioner
BMW 3 Series G20 (2018-2026) Training manual / B46TU-B48TU Engines / Engine Mechanical / 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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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
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
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Glass sunroof
General information
The glass sunroof and the sun protection are operated
using the same switch.
Safety information
Warning
Body parts can be jammed when operating the
glass sunroof. There is a risk of injury. Make
sure that the area of movement of the glass
sunroof is clear during opening and clos
Interior mirror, manually
dimmable
To reduce the blinding effect of the interior mirror,
flip the lever forward.
Interior mirror, automatic
dimming feature
General information
The interior mirror is dimmed automatically.
Photocells are used for control:
In the mirror glass.
On the back of the mirror.
Overview
Functional requir
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