Turbocharger: Testing and Inspection

Turbocharger (TC), quick check

Stop the engine and listen to the 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 that:
- the compressor wheel spins easily when rotated
- the axial- and radial play feels normal
- the compressor wheel does not rub in the compressor housing.

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

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