Common Causes
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.
