My Golf mkV TDI daily has started whirring/squealing sound when idling. Initial thought it might be one of the belts. Don't know nothing about the TDI or oil burners for that matter.
Checking anyway I noticed a chip which I can only describe as a CAS sensor type thing. Don't know what it is tbh. But suspect a chunk of metal missing isn't normal.
Does anyone know if this could be culprit and if this chip is of worry?
Any help appreciated.
Many Thanks