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The main reason of VNT Turbo failure - Carbon Deposits

The main reason of VNT Turbo failure - Carbon Deposits

19 May 2022
At recent years,many diesel cars are fitted with a Turbocharger using a Variable Geometry or Variable Nozzle Ring. These VNT turbochargers are very effective in minimising the effects of turbo lag, resulting in a more responsive throttle especially at low engine speed and much improved torque.

These systems work by changing the speed and direction of the exhaust gases onto the turbine wheel. At low engine speed, the VNT vanes are in the “closed” position narrowing the gap between them which accelerates the exhaust gas onto the turbine wheel.  At high engine speed the VNT vanes open up slowing the exhaust gases, which prevents the turbocharger over-boosting.

Despite these benefits, such turbochargers can be prone to problems.  The vane mechanism is easily affected by carbon deposits, which can cause the mechanism to jam.

The main reason of carbon deposits is driving style - short trips, extended engine idling and a frugal driving style can all prevent the engine from reaching its optimal operating temperature, resulting in hydrocarbons being produced and existing carbon deposits not being burnt off. Over time these deposits let the VNT mechanism start to stick or become completely stuck, finally resulting the engine management problems or complete turbo failure.

There are some things you can do to slow down this carbon deposits such as giving your vehicle a good run every week, keeping the engine revs up high and the turbo on boost generating the heat that is required to burn these deposits off, there are also a little fuel treatments you can add when filling up that help keep your engine and turbo a little cleaner.

If the VNT system in your Turbocharger have already damaged by Carbon Deposits, you need to clean the intake system and replace new Variable Geometry or Variable Nozzle Ring, which you can find in REFONE GROUP TURBO!
The following are some hot selling Turbo nozzle Rings for your reference:
GT1749V 708639-2 for Renault,
GT2056V 767720-2 for Nissan,
BV50 5304-970-0069 for Land Rover,
TF035 49335-01410 for Mitsubishi,
CT16V 17201-0L040 for Toyota,
S300V 173900 for International
...

We supply different types of Geometrias or Nozzle Rings, VNT, VGT,VTG, VS are all available in REFONE! Welcome to send inquiry now!


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