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
Depending on the program, the massage function
ensures relaxed muscles and better blood
circulation and can avoid fatigue.
General information
Eight different massage programs can be selected:
Pelvis activation.
Upper body activation.
Full body activation.
Back massage.
Shoulder massag
General information
The new BMW 5 Series with the development code G30 will be equipped with a
further developed and
optimized heating and air conditioning system. The heating and air-conditioning
system is similar to
the BMW G12. The G30 uses the new R1234yf refrigerant.
A brushless blower motor