BMW 3 Owners & Service Manuals

BMW 3: Connecting rod - Crankshaft drive

Crankshaft drive
Connecting rod

  1. Piston
  2. Area transferring the force
  3. Wrist pin
  4. Connecting rod bearing with shaped bore hole
  5. Connecting rod
  6. Connecting rod bearing (B46TU only)
  7. Small connecting rod eye (trapezoidal shape)
  8. Large connecting rod eye (cracked)
  9. Connecting rod bolts of the connecting rod bearing cap
  10. Connecting rod bearing shell of the connecting rod bearing cap
  11. Connecting rod bearing shell of the connecting rod (IROX-coated)

The drop-forged cracked connecting rods with IROX coating are known from the B38/B46 engines.


     IROX coating - Crankshaft drive

    Detailed magnification of the IROX coating IROX-coated bearing shell Oil film IROX coating Bearing shell Binding resin Hard particle Solid lubricant The IROX coating is applied to a conventi

     Chain drive - Crankshaft 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-vacu

     Chain tensioner

    Chain tensioner Tensioning rail Sealing sleeve Chain tensioner with screw thread Due to the cylinder head manufacturing process, the chain tensioner now has a sealing sleeve with a height of 12


     Jacking points for the vehicle jack

    The jacking points for the vehicle jack are located at the indicated positions. Jacking up the vehicle Warning Hands and fingers can be jammed when using the vehicle jack. There is a risk of injury. Comply with the described hand position and do not change this position while using the vehicle jac

     Traffic bulletins via voice operation

    Concept The voice activation system can be used to ask questions about the current traffic situation depending on the destination guidance status. Information about the traffic situation is announced. Announcing traffic information Example with active destination guidance: 1. Press the button on th

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