Is the turbocharger whistling from the last hole? The info!

If there are strange noises from the engine compartment, the turbocharger may already be whistling from the last hole. The one running internal combustion engine makes noises in the vehicle is certainly clear. After all, internal combustion engines are known for not silent to run across from the emotionless e-boxes. However, it interferes with the classic engine noises whistling sound, some drivers panic. However, this whistle does not always have to cause fear and horror. In some situations, a whistling engine noise can also be heard normal be. This guide aims to provide clarity on the subject whistling turbocharger create. We explain where the whistle can come from and how to behave properly in such situations. For a long life of the turbocharger and the engine!

Turbocharger - more than just a paddle wheel

Yes, first of all, a look at the turbocharger in general. How does the so-called "turbo" actually work and with which engines is it used? A turbocharger comes with Internal combustion engines for use. Regardless of whether gasoline or diesel drive, a turbocharger can occur in both. The reason is quickly explained, a turbo engine has a clear compared to a naturally aspirated engine higher performance with the same motor size.

The function of a turbocharger is also quickly explained. In principle, a turbo works relatively simply. The exhaust gas flow from the engine produces a Turbine wheel driven, which is connected to a compressor wheel on the suction side via a shaft. As a result, compressed air is pressed into the cylinder by the exhaust gas flow. The faster the engine turns, the faster the turbine wheel turns due to the exhaust gas flow and the more air is forced into the combustion chamber. Thereby the engine power increases with the speed

Whistling turbo - engine failure?

Reached the turbine wheel in the turbocharger very high speeds and this creates typical "turbo noises". The noises are a bit like you airy whistles. A low whistle is fundamental with turbo engines normal and not worrying. This noise only occurs under load and should be no longer noticeable at idle speed and fall silent. Especially after high-speed trips, a whistle from the turbo is completely normal, if the engine is switched off immediately. So whistling is not always a problem.

A whistling turbo only becomes interesting and potentially dangerous for the engine when the whistling sound is heard continuous stays and ungewöhnlich Sea becomes. Then the noises should be taken seriously, because then there is usually a technical problem on or in the turbo. It is now important to act quickly to prevent damage to the turbocharger. Unfortunately, there is a whistle on the turbocharger keine to assign typical errors. There can be various reasons why the turbo suddenly makes noises. Let's take a look at the various reasons for any noise from the turbocharger below.

The most common causes of whistling in the turbo are:

• Engine oil problems
• Air outlet
• Foreign matter in the turbocharger
• Exhaust air is obstructed

Problems with the engine oil: briefly on how it works. The turbine and compressor wheels of the turbocharger are also permanently lubricated via the engine's oil circuit. This is the only way to keep the moving parts at the high temperatures smooth. However, old or dirty engine oil no longer has sufficient lubricating power. This can already lead to unusual noises in the turbocharger. If you drive for too long with bad or old engine oil, in the worst case scenario, you risk Bearing damage on the turbocharger or later engine failure at the vehicle. Hence, a regular one Engine oil change indispensable! If the turbocharger starts to whistle, an oil change can help. Also a leak, for example on the Cylinder head gasket, can be responsible for the turbo noise. If the engine oil comes into contact with fuel, the lubricating performance is reduced. In the worst case, the lubricating film can tear off, which can damage the components!

Air outlet: The high speed at which the air rushes through the turbocharger causes leaks whistling sound noticeable. Possible sources of error are mostly Lines to the intercooler or the seal of the turbine. To clarify this, only disassembly and manual repair will help.

Foreign body: If there are foreign bodies in the supply air ducts, these can also lead to noises during operation. A typical example of foreign bodies in the turbo system are Abrasion due to wear and tear or Oil coal from burned engine oil. The only thing that helps here is dismantling and thorough cleaning. Again, you shouldn't wait too long, otherwise a Damage to the compressor wheel threatens.

Exhaust air obstructed: Today's diesel vehicles all have one Particle Filter, which filters out the finest particles from the exhaust gas. This filter clogs up quickly, especially on short journeys or in city traffic. As a result, the exhaust gas flow is hindered and this creates whistling air noises in the turbocharger. If the whistling occurs in connection with a lot of short journeys, one helps Regeneration drive. Means a long trip at high speeds (highway trip).

Avoid turbo damage - adapt your driving style

To avoid costly damage to the turbocharger, the vehicle should discord gently to operating temperature be driven. Avoid high speeds when cold. And the engine after driving at high revs not turn off immediately. It is better to let it run for a certain time (20-30 seconds) at a low speed. This protects the turbocharger (cools down). It is also important that Service and maintenance intervals of the manufacturer. If the turbocharger makes strange noises, then to be on the safe side, you should place it in a Have the workshop checked. So nothing stands in the way of a long turbo life and long joy with the vehicle!

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