CLUB OF CAR FANS
How it's done
TURBOCHARGER SECOND BREATH
NPO Turbotehnika is restoring units of imported cars.
It would seem a trifle - they saved, did not change the air filter on time. An engine equipped with a boost unit will not slow to punish the hunks. The vacuum at the inlet to the turbocharger will increase sharply and the seals that do not withstand the oil pressure will leave the bearings dry. A few hundred kilometers, and a jammed unit will block the breath of the motor. The same fate awaits the compressor, lubricated with summer, and even worse “left-handed” oil during the freezing winter. Due to poor pumpability, grease does not enter the bearings in the right amount at the time of start-up. Scoring in a friction pair, progressive wear and a quick failure of the unit are guaranteed.
About the traditionally Russian reason - getting into the air duct of foreign objects, bolts, nuts, keys, forgotten by a mechanic at the next MOT, and no need to say. Well, if the Kulibins try to hastily correct the mistake with a hammer and a chisel, you can safely throw out an unusable piece of iron. No, no, we in no way diminish the talent of the Russian masters who are able to “shoe on their knees” to agglitzi flea, but will she dance after that?
Of course, the turner-golden hands will grind the bulged turbine roller, grind out new bushings, bearings, and an experienced diesel engineer who went through more than one imported engine will carefully assemble the unit. Done! Let it go! Alas, it is unlikely that the specialist knows that most imported turbochargers use floating (rotating) sliding bearings, in which a bronze bushing covering the rotor shaft floats due to a double oil wedge on the outer and inner surfaces. The design of such a bearing assembly requires not only extremely precise manufacturing of parts, but also their careful balancing, because the rotor speed reaches 120, 000 rpm! Agree that the equipment for this crucial operation is not in every workshop! Well, and how in artisanal conditions to provide the required cleanliness and hardness of the surface?