BMW 5 Series Owners & Service Manuals

BMW 5 Series: Crankcase

Honing process

Engine housing
Honing process "old/new"

  1. Previous manufacturing process of internal cylindrical honing
  2. 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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     Crankshaft drive

     Chain drive

    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

     Chain track

    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 Up

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     Split cooling valve

    Heat management module with electric split cooling valve Electric split cooling valve To guarantee optimal heat distribution during the cylinder head and crankcase warm-up, the coolant supply for the cylinder head and crankcase is controlled individually. The coolant is controlled by the Digi

     Chain drive

    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 pump via a separate chain Plastic tensioning and guide rail Hydraulic chain tensioner with spring

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