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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The detection of objects can test the ultrasonic measurement system to its
limits. Several examples
of this are shown below:
With trailer towbars and couplings.
If the objects are thin or wedge-shaped.
If the objects are projecting and elevated, e.g. wall projections or
loads.
If the objects
Safety information
Warning
Steering wheel adjustments while driving can
lead to unexpected steering wheel movements.
Vehicle control could be lost. There is a risk of
accident. Adjustng the steering wheel while the
vehicle is stationary only.
Electric steering wheel
adjustment
General information
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