Turbocharger: Testing and Inspection

Quick check, turbocharger (TC)

Stop engine and listen to turbocharger (TC) at the moment of stopping




Normally the rotating turbocharger (TC) components stop moving after the engine.

If this is not the case:
Remove the inlet hose from the compressor housing.

Check afterwards that:
- the compressor wheel spins easily when rotated.
- axial- and radial play feels normal.
- the compressor wheel does not rub in the compressor housing.

Replacing turbocharger (TC)
In a number of cases the turbocharger (TC) has been changed unnecessarily. This happened because some play has been felt when checking (the shaft floats on an oil film).
Play should always be checked before replacing, to determine if the bearings are worn.

The turbocharger (TC) should always be replaced complete:
- plug all terminals on the old turbocharger before it is sent away.