Reconditioning of a turbocharger

Turbo’s Hoet is reconditioning all sorts of turbochargers, with the exception of variable geometry turbochargers. The reconditioning takes place in our advanced workplaces. In the video you can see which steps we follow during the reconditioning process in the workplace.

The reconditioning process consists of the following steps, which we will be describing for you step by step:

  • cleaning
  • surface treatment
  • check-up
  • balancing


The balancing is one of the most important steps in reconditioning a turbocharger. The reason is simple, since the number of revolutions of a modern turbocharger are now higher than 230 000 revolutions/minute. At these speeds, the slightest imbalance can cause the destruction of the turbo.

The balancing consist of 3 steps :


1. Balancing of the shaft

2. Balancing of the core assembly

3. Balancing of the complete turbo


Balancing of the shaft
For a correctly balanced turbo, it is crucial to balance the wheels dynamically. This means : with two correction surfaces. Every component needs to be balanced individually. This takes place on a Schenk balancing machine.

Balancing of the core assembly
After having balanced the shaft, the core assembly can be assembled. Because not all the internal parts are balanced, it is required to balance the core assembly as a whole. For this job, we use a core assembly balancing machine.

Balancing of the complete turbo
During the last step, we must check the turbo on possible vibrations, which can cause a noisy turbocharger. This must be checked at maximum speed, as if the turbo was on the engine at full power. This test will not only diagnose imbalance, but will also detect possible oil leakage from the turbo. The machine use for this is a VSR or Vibration Sorting Rig, which is required by every turbo manufacturer.