Although the concern and attention of our car is able to extend its trouble-free use, however - like any mechanical device - even turbocharger is sometimes exposed to damage and failure. We should remember that the turbocharger in a car is one of the most enduring elements of the propulsion system. The following are the most common failures which occur in as much as 90% of all the causes of breakdown .

The damage caused by the intrusion of foreign bodies such as hard particles of sand or - in the winter - of salt in the rotor housing or the compression wheel.

Warning! Turbochargers with this type of damage should absolutely not to be used under any circumstances.

This type of damage can be caused by:

1. damaged or poor quality air filter
2. damaged cables air filtration system
3. rust in the exhaust manifold

Interruptions in the supply of oil in repeated short periods of time (about 45 seconds) cause polishing and burning of the bearing surfaces.
The cause of such damage can be:

1. changing the oil and oil filter on other than the previously used
2. exchange of turbocharger without flooding it with oil
3.a long period of not using the car
4. inappropriate start of the engine after replacement or repair of turbochargers
5. low oil pressure due to the poor functioning of the lubrication system
6. oil contamination by eg. fuel

Breaks in bringing oil or its too low pressure in system result in over polished bearing surfaces. Shortage of oil pressure over a prolonged period (greater than 810 seconds) additionally leads (except polishing and firing bearing surfaces) to form a turbocharger bearing system symptoms so called discolorations. We should remember that a shortage of pressure is the most dangerous form of interruptions in the supply of oil, which may cause repair of a turbocharger as to have the turbine regenerated.

This type of damage can be caused by:

1. bent, broken or clogged pipe turbocharger lubrication
2. faulty oil pump
3. low oil level in the sump
4. loss of lubrication due to too long operation of the vehicle on a slope terrain
5. turbochargers run without flooding with oil
6. Invalid start the engine after replacement or repair of turbochargers
7. excessive engine wear
8. defective crankcase vent system (pneumothorax)
9. too long a period of inactivity car
   
   

Excessive exhaust temperature or too fast turning off the engine after work can lead to the accumulation of carbon from spent oil. To avoid this, after finishing driving, allow the engine to idle for about 1 - 3 min. Such time is enough for adequate cooling of the turbocharger. Transition from the body heat of the exhaust turbocharger to the central body causes burning of oil and corrosion of turbocharger bearings. The main damage occurs on the ring and grooves of the turbine shaft and the bearing of the turbine. Charred oil creates a blockage that blocks the outflow of oil in the middle. Accumulation of carbon causes the friction, which leads to bends and cracks of the turbocharger.

This type of damage can be caused by:

1. blockage or wear of air filter
2. too quick turning-off the engine after work
3. poor quality engine oil
4. too rare replacing of the engine oil
5. blow air and flue gas
6. faulty injectors
7. ill-fitted body turbines
8. defective turbocharger lubrication system
9. inefficient drainage oil (crankcase ventilation defects in the motor)