BMW 5 Series Owners & Service Manuals

BMW 5 Series: Chain drive

BMW 5 Series G30 2016-2026 Training Manual / B58TU Engine / Engine Mechanical / 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 pump via a separate chain
  • Plastic tensioning and guide rail
  • Hydraulic chain tensioner with spring preload and sealing sleeve.

Crankshaft drive
Comparison of the chain drive of B58 engine and B58TU engine

  1. Two-part chain drive
  2. Single-part chain drive
  1. Slide rail
  2. Top timing chain
  3. Chain tensioner
  4. Tensioning rail
  5. Bottom timing chain
  6. Camshaft sprocket, oil vacuum pump
  7. Drive chain, oil vacuum pump
  8. Guide rail
  9. Timing chain

The main difference between the chain drive compared with the B58 engine is the move from a two- part timing chain drive to a single-part timing chain drive. Deflection via the intermediate shaft on the top timing chain and the second timing chain is no longer needed. The chains used here are 8 mm sleeve-type chains. Because the intermediate gearing is no longer needed, the number of teeth on the crankshaft (23 teeth) and the VANOS adjuster (46 teeth each) has also changed.

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