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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Refueling
Fuel cap
1. To open the fuel filler flap, press on the rear
edge, arrow. The fuel filler flap opens.
2. Turn the fuel cap counterclockwise.
3. Place the fuel cap in the bracket attached to
the fuel filler flap.
Gasoline
For the best fuel efficiency, the gasoline should
be sulfur-free or
General information
All washer nozzles are supplied from one reservoir.
Use a mixture of tap water and windshield
washer concentrate. If desired, a windshield
washer concentrate containing antifreeze can be
used.
Recommended minimum fill quantity:
0.2 US gal/1 liter.
Safety information
Warning
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