The turbocharger oil lines (inlet and return lines) are the ‘lifeline’ of the turbocharger, responsible for lubricating and cooling the turbocharger bearings. A fault in the oil lines can directly lead to damage to the turbocharger, which in turn can cause engine failure. Below are the common causes, symptoms and preventive measures for faults in the turbocharger oil lines: I. Common Causes of Tur...