Do-it-yourself turbine repair goby

For many car enthusiasts who love power and speed, the question of buying a car with a turbocharged engine is very important.

In turn, the task of the turbocharger is to supply a larger volume of air to the engine cylinders and, as a consequence, increase the power of the latter.

The only drawback of such a useful element is frequent failure, so every motorist should be able to make at least minimal repairs to the turbine.

Structurally, a turbocharger is a very simple mechanism that consists of several basic elements:

1. General body of the node and snail;
2. Plain bearing;
3. Thrust bearing;
4. Distance and thrust bushings.

The turbine housing is made of aluminum alloy and the shaft is made of steel.

Therefore, in the event of failure of these elements, the only correct solution is only replacement.

Most turbine damage can be easily diagnosed and repaired. At the same time, the work can be entrusted to professionals in their field, or you can do everything yourself.

In principle, there is nothing complicated about this (we will consider how to dismantle and repair a turbine in the article).

As the operating practice shows, there are two main reasons for breakdowns - poor-quality or untimely maintenance.

If, however, a technical inspection is carried out according to the plan, then the turbine will work for a long time and without any particular complaints from motorists.

So, today there are several main signs and reasons for turbine failure:

• 1. The appearance of blue smoke from the exhaust pipe at the time of increasing revs and its absence when the norm is reached. The main reason for such a malfunction is the ingress of oil into the combustion chamber due to a leak in the turbine.

Video (click to play).

• 2. Black smoke from the exhaust pipe - indicates the combustion of the fuel mixture in the intercooler or delivery line. The probable cause is damage or breakdown of the TKR (turbocharger) control system.

• 3. White smoke from the exhaust pipe indicates a clogged turbine oil drain line. In such a situation, only cleaning can save.

• 4. Excessive oil consumption up to one liter per thousand kilometers. In this case, you need to pay attention to the turbine and the presence of a leak. In addition, it is advisable to inspect the joints of the pipes.

• 5. The dynamics of acceleration is "dulled". This is a clear symptom of a lack of air in the engine. The reason is a malfunction or breakdown of the TKR control system (turbocharger).
• 6. The appearance of a whistle on a running engine. The likely cause is an air leak between the motor and the turbine.
• 7. Strange grinding noise during turbine operation often indicates the appearance of a crack or deformation in the housing of the unit. In most cases, with such symptoms, TCR does not "live" for a long time and further repair of the turbine may be ineffective.

• 8. Increased noise in the operation of the turbine can cause clogging of the oil line, changing the rotor clearances and rubbing the latter against the turbocharger housing.
• 9. An increase in exhaust gas toxicity or fuel consumption often indicates problems with the supply of air to the TCR (turbocharger).

To repair the turbine with your own hands, it must be dismantled.

This is done in the following sequence:

• 1. Disconnect all piping that leads to the turbine. In this case, you should be extremely careful not to damage the node itself and the devices adjacent to it.

• 2. Remove the turbine and compressor volutes.The latter can be dismantled without problems, but the turbine volute is often attached very tightly.

Here, dismantling can be done in two ways - by the mallet method or by using the snail mounting bolts themselves (by gradually releasing them from all sides).

When performing work, you must be very careful not to damage the turbine wheel.

• 3. Once the work on dismantling the volutes is completed, you can check for any shaft play. If the latter is missing, then the problem is not with the shaft.

Again, slight lateral play is acceptable (but not more than one millimeter).

• 4. The next step is to remove the compressor wheels. Pliers come in handy to do this job. When dismantling, please note that the compressor shaft has a left-hand thread in most cases.

A special puller is useful to dismantle the compressor wheel.

• 5. Next, the sealing inserts are dismantled (they are located in the grooves of the rotor), as well as the thrust bearing (it is mounted on three bolts, so there are no problems with removal).

• 6. Now you can remove the liners from the end part - they are fastened with a retaining ring (sometimes you have to tinker when dismantling).

The plain bearings (compressor side) are secured with a circlip.

7. When performing dismantling work, it is necessary (regardless of the breakdown) to rinse and clean the main elements - cartridge, seals, rings and other components.

Once dismantling is complete, repairs can be made. To do this, there should be a special repair kit at hand, which contains everything you need - inserts, hardware, oil seals and rings.

Check the quality of the fixation of the nominal liners. If they are loose, then they need to be grooved and the shaft should be balanced.

In this case, it is advisable to clean the liners well and lubricate them with engine oil.

The retaining rings located inside the turbine must be installed in the cartridge. At the same time, make sure that they are in their place (in special grooves).

After that, you can mount the turbine liner, having previously lubricated it with engine oil. The liner is fixed with a retaining ring.

The next step is to mount the compressor liner, after which a well-lubricated liner can be inserted.

Next, put a plate on it and tighten it well with bolts (without fanaticism).

Install the dirt plate (secured with a retaining ring) and an oil scraper ring.

It remains only to return the snails to their place. That's all.

This article provides a general algorithm for disassembling and assembling a turbine. Of course, depending on the type of the latter, this algorithm will be partially changed, but the general course of work will be identical.

Well, if a serious breakdown is revealed, then it is better to immediately replace the old turbine with a new one.

In the absence of serious defects, the repair of the turbine takes no more than a few hours. But with the help of improvised tools and material prepared in advance, you can make a very high-quality and budgetary repair.