Complaints

1. DAMAGE BY FOREIGN MATERIAL

Bent or chipped rotor blades or compression wheels are damage caused by a foreign object that has entered the suction or exhaust body.

Possible causes:

• nuts/bolts/stones/sand/hard element left in the air charging system,
• broken engine components,
• late air filter replacement,
• cracked connection elements or other objects that got inside the device.

Inspect the air intake duct and exhaust manifold for foreign objects. Find and eliminate the cause of damage. Inspect and clean the intake and exhaust systems. Replace the air filter element.

2. OIL PRESSURE DEFICIENCY (NO LUBRICATION)

A longer oil pressure shortage burns and damages the bearing surface and turbocharger rotor. It also causes thermal discoloration of these components.

Possible causes:

• damaged oil pump,
• blocked, broken or bent turbocharger lubrication pipe,
• low level of oil in the oil pan,
• malfunctioning of the lubrication system,
• long driving of the vehicle with a large slope.

Check/replace oil pump along with relief valve. Check the lubrication system together with the hose responsible for lubricating the turbocharger. Clean and check the condition of the oil pan - replace it with a new one in case of dents.

3. INTERRUPTIONS IN OIL SUPPLY

Repeated short breaks of 4-5 seconds can lead to burn-out and polishing of the bearing surface.

Possible causes:

• the consequence of incorrect oil change and oil filter (dry start of the turbocharger),
• replacement of the turbocharger without pouring it over with oil,
• the car has not been used for a long time,
• low oil pressure due to poor functioning of the lubrication system,
• improper engine start after turbocharger replacement or refurbishment,
• oil contamination (e.g. fuel or glycol).

Check/replace oil pump. Check the lubrication system together with the hose responsible for lubricating the turbocharger. To avoid damage after prolonged non-use of the vehicle, start the engine for a few seconds, turn it off and repeat the operation several times in order to completely fill the pipes and the turbocharger with oil and bleed them.

4. CONTAMINATED OIL

Dirty oil causes deep scratches on the turbocharger bearings.

Possible causes:

• blocked, damaged or low quality oil filter,
• engine wear and the possibility of damaged parts,
• oil filter overflow valve defective,
• low quality engine oil,
• engine oil not changed for too long.

This type of damage can be avoided through using and regularly changing high-quality oils and filters. Remember to change them regularly according to the manufacturer's instructions or even more often!

5. DAMAGE TO THE MECHANISM OF VARIABLE GEOMETRY

Stuck or burned blades of variable geometry are a common reason for overcharging or lack of charging of the turbocharger. Due to the oil deposit on the variable geometry, the car can enter into emergency mode and have a significant power drop.

Possible causes:

• damaged/inefficient particulate filter (DPF/FAP) or catalyst,
• damaged injectors,
• excess oil from leaking engine head, valve seals or sealing rings,
• faulty turbocharger actuator or controller,
• frequent driving in short distances at slow speeds.

You need to correctly diagnose the cause of damage and correct it. In 99% of cases this will be one of the above reasons. To avoid failure of the variable geometry mechanism, we advise you to check: the particulate filter, injectors and oil pressure. We recommend regular longer rides, where the mechanism has the chance to warm up and get rid of carbon deposits.

6. OVERHEATING

Higher temperature transmitted from the exhaust body of the turbocharger to the body of the core contributes to the burning of oil and causes corrosion of the subassembly bearings. Excessive exhaust gas temperature or engine shut-down too quickly after operation causes an accumulation of carbon resulting from burning oil. The rotor sealing ring and its location (turbine shaft groove) and turbo bearing are primarily exposed to damage. The burnt oil also blocks the oil outflow, and its accumulation causes friction, which consequently bends or cracks individual parts of the unit. The engine may also ignite due to overheating.

Possible causes:

• poor quality engine oil,
• too fast engine shutdown after intense operation,
• clogged or worn out air filter,
• air and exhaust air blows,
• rarely changed engine oil,
• damaged or faulty injectors,
• defective lubrication system,
• faulty oil drainage system (incorrect venting of the engine crankcase).

7. INTAKE OIL

Oil from the engine, which enters the turbocharger from the suction side, most often leads to the accumulation of oil scale at the seal location of the turbocharger rotor. Accumulated burned oil causes grinding of the bearing and the rotor groove (location of the rotor sealing ring), which in consequence leads to "blowing out" of this ring.

INTAKE SYSTEM - ENGINE LUNGS

The intake system is responsible for supplying air to the engine (in units with direct fuel injection) or air-fuel mixture (in engines with indirect injection). Real problems arise when engine oil begins to accumulate in the intake system. Under no circumstances should it be there!

INCORRECTED BREATHER VENT

The reason for oil retention in the intake, often disregarded even by mechanics, is malfunctioning of the breather vent. The task of the breather vent is to ventilate the crankcase. Along with the air that is extracted from the box, engine oil (small amounts) is also sucked in. The problem is that after a few years of use, the oil separator located in the breather vent stops working properly and passes air into the turbocharger inlet pipe together with oil vapours. As a result, the compressor forces air and oil into the intercooler hose.

WORN-OUT PISTON RINGS/BLOWS ON THE ENGINE

The presence of oil in the intake system may also be the result of worn-out piston rings, which results in the oil being blown into the intake system. If the car's engine actually requires replacement of the rings, it is worth checking the other parts (heads). It may turn out that soon after replacing the rings you will have to disassemble the engine again to eliminate another fault.

EXCESSIVE ENGINE OIL

The reason for oil entering the intake system may also result from excessive oil in the engine. Workshops often pour too much engine oil, most often because of the short time they can devote to the vehicle. Before the oil drains from the motor completely, they fill it with the amount of oil recommended by the manufacturer. That's when the risk of oil appearing in the breather vent increases, which will supply it to the intake system.