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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Concept
The range indicates the distance that can still be
covered with the current fuel level.
General information
The estimated range available with the remaining
fuel is permanently displayed in the instrument
cluster.
With a low remaining range, a Check Control
message is briefly displayed. Wit
Overview
Front
Seat heating
Rear
Seat heating
Switching on
Press the button once for each
temperature
level.
The maximum temperature is reached when
three LEDs are lit.
If the trip is continued within approx. 15 minutes
after a stop, seat heating is activated automatically
with the temperature