Most turbocharger failures are caused by problems outside the turbocharger. If the turbocharger is defective, it is very important, in addition to replacing the turbocharger, to determine and eliminate the cause of the turbocharger failure, as the embedded turbocharger would not be broken again. Upon the recommendations of the world's largest turbocharger manufacturers Garrett, Holset, Borg Warner (KKK and Schwitzer), MHI and IHI, which we are an authorized service and distributor for the territory of Serbia and Montenegro, and based on twenty-five years of experience in turbocharger repair, your turbocharger has been inspected is the following:
Damage to the turbocharger is caused by the entry of a foreign particle into the compressor housing. The foreign particle damaged the compression wheel from the front, the input side which is reflected in breaking the blades. This damage causes the turbocompressor rotor debarment, and therefore the wear of bearings and sealing links of the turbocharger. As an end result we have oil consumption, the engine has no power, and there is a black or white smoke on the exhaust. This phenomenon is often accompanied by a buzz sound in the operation of the turbocharger. The foreign particle can be found in the suction branch due to damage to the air filters, due to the hole or cracks on the air intakes or if they have failed on the hose connections, or if the installation has not been cleaned during the previous overhaul of the turbocharger.
The dismantling of the turbocharger detected a damage characteristic of the occurrence of partial or complete congestion of the exhaust gas pipe (exhaust pipe). Partial or complete conduction of the pipes creates a high pressure of the exhaust gases in the turbine housing, and since the exhaust gases can not unfasten the engine, they push the turbocharger forward to the compressor side. On the front side of the turbocharger, traces of unauthorized wear of the turbine wheel on the flame guard are visible, so the turbocharger leaks oil. All this causes loss of engine power and oil consumption, beige or blue smoke on the exhaust. The cause of the fault is a faulty (blocked) engine brake (faulty brake cylinder or a burning axle of the motor brake butterfly), or a foreign body blocked the exhaust.
With the dismantling of the central assembly of the turbocharger, high wear of the sliding surfaces of the bearings and axles of the turbocharger was determined. Traces of wear - furrows in characteristic places, due to dirt in oil for lubrication, are clearly visible. The oil is contaminated with combustion products and shavings of engine parts. Depending on the degree of oil contamination, the gap between the bearings and the shaft increases, causing the sealing of the sealing links and the appearance of the turbocompressor turbine turbine, and even the blades of the turbine and compressor circuits on the turbocharger housing. The turbocharger consumes oil, the engine has no power, and there is a beo or black smoke on the exhaust. When installing the hose with the oil inlet and oil drain plugs, sealant masses must not be used, but the original seals must be used for this purpose.
On the passenger cars in the exhaust of the engine, a catalytic converter is installed. By the time of precipitation of the products of combustion, gargoyles and soot, there is a partial or complete congestion of the catalyst. Partial or complete concealment of the pipes creates a high pressure of exhaust gases in the turbine housing, and as in the previous case, this causes loss of engine power and oil consumption, blue or blue smoke at the exhaust and damage to the turbocharger rotor circuits.