Melett offers expert advice on common turbocharger failures
Melett, a leader in precision-engineered turbochargers and components for the global automotive aftermarket, is sharing expert guidance on common turbocharger failures and how to prevent them to ensure optimal performance.
The role of lubrication
Insufficient oil flow is a major risk, as blocked oil feed pipes, worn oil pumps and sludge build-up from improper shutdowns are common causes of lubrication failure. Without adequate oil flow, turbo bearings can suffer rapid wear, leading to failure.
To avoid these issues, Melett recommends priming the oil system thoroughly before fitting a replacement turbo and ensuring oil feed pipes are replaced to remove blockages. Using high-quality oil of the correct grade and allowing the engine to warm up properly before driving are simple yet effective ways to extend turbocharger life.
Combatting oil contamination
Oil contamination remains one of the leading causes of turbocharger failure, and the effects of debris from previous engine wear or poor-quality filters can cause a major issue. Dirty oil can result in significant damage to the turbo’s internal components, cutting its lifespan dramatically.
Melett advises technicians to purge oil systems after any failure and take care when replacing oil to prevent accidental contamination. Using high-quality filters and replacing oil at the recommended intervals will help keep the turbocharger in peak condition.
Preventing overspeeding
Overspeeding, which occurs when a turbo operates beyond its intended limits, is another common failure mode. Blocked air intakes, torn air pipes and leaks in the system all force the turbo to work harder, increasing the risk of component fatigue and damage.
Melett advises checking air hoses and intake systems for leaks or cracks. Ensuring seals are intact and replacing damaged components can significantly reduce the risk of overspeeding and its associated failures.
Protecting against foreign object damage
The debris and particles that can enter a turbocharger, whether through servicing or engine wear, pose a serious threat to its performance. Foreign object damage is often indicated by grinding noises or visible marks on the turbine or compressor blades.
To prevent these issues, Melett stresses the importance of inspecting and cleaning all intake pipes and air filters before fitting a replacement turbo. Regular servicing should include a thorough check of air hoses and filters to ensure they are free from contaminants and blockages.
Addressing overheating risks
Blocked diesel particulate filters (DPFs), hot engine shutdown or cooling system leaks l can cause lasting damage to internal components. The excess heat caused by these issues leads to carbonisation of the oil within the turbo. Left unaddressed, these problems can lead to complete turbocharger failure.
Melett recommends technicians check cooling systems and DPFs for any blockages or leaks during servicing. Additionally, drivers should be reminded to allow engines to cool after long journeys to protect the turbo from unnecessary strain.
Turbocharger repair specialists can provide a full turbo inspection and diagnosis service to help identify the root cause of failure and prevent further issues.