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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Light functions
Front fog lights.
Night vision.
Lights off.
Daytime running lights.
Parking lights.
Automatic headlight control.
Adaptive light functions.
Low beams.
Instrument lighting.
Right roadside parking light.
Left roadside parking light.
Wiper system
Switching the wipers on/off an
Fuel preparation
The fuel preparation has been modified to meet the requirements of emission
legislation. The high
pressure pump and the injectors have been revised and designed for a fuel
injection pressure of
350 bar.
Fuel preparation, B58TU engine
Injector
Holding clamp
Rail pressure