BMW 5 Series: Crankcase
Honing process

Honing process "old/new"
- Previous manufacturing process of internal cylindrical honing
- New manufacturing process of form honing
The cylindrical bore hole of a combustion engine becomes deformed during the
operating condition
by thermal loads. Form honing allows this deformation to be achieved in
production, so that there is an
almost cylindrical shape in the operating condition. This has a positive effect
on the emissions quality,
oil and fuel consumption, as well as output and wear.
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Features:
Chain drive at the side of the engine emitting the forces
Single-part chain drive for driving the camshafts
Single sleeve-type chain 8 mm
Electric motor of the combined oil-vacuum
Comparison between chain track of B58 engine and B58TU engine
Chain track, two-part timing chain drive B58 engine
Chain track, single-part timing chain drive B58TU engine
6-cylinder engine
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Maintaining and storing the speed
Press the rocker switch up or down once while
the system is interrupted.
When the system is switched on, the current
speed is maintained and stored as the desired
speed.
The stored speed is displayed in the speedometer and briefly in the
instrument cluster.
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General information
Some iDrive functions can be operated using the
touchpad on the Controller.
Selecting functions
Via iDrive:
1. "My Vehicle".
2. "iDrive settings".
3. "Touchpad".
4. Select the desired setting:
"Speller": enter letters and numbers.
"Map": use the map.
"Search fields": to wr