The ABC to the MAHLE Original turbocharger diagnostics.

Defects on the exhaust-gas turbocharger mostly have one of the following causes:

  • Inadequate lubrication
    If there is insufficient lubrication, the bearings will fail and the compressor and turbine wheels grind against their housings.
  • Dirty oil
    Dirty lube oil leads to score marks on shaft journals and bearings. Oil bore holes and seals become clogged and cause high oil losses.
  • Intrusion of foreign bodies
    Foreign bodies that, for example, enter through a defective air filter, damage the turbine or compressor wheels. The resulting unbalance damages the turbocharger bearing.