BMW 5 Series: Passive Safety Systems

 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 Upper timing chain Timing chain Lower timing chain Drive chain, oil vacuum pump The way the combin

 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