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What kills a turbocharger?

A turbocharger is a critical component in many modern engines, but it can also be vulnerable to various issues that can lead to its premature failure. Understanding the common causes of turbocharger failure is essential for maintaining the performance and longevity of your vehicle.


Causes of Turbocharger Failure


Several factors can contribute to the demise of a turbocharger, including:



  • Oil Starvation or Contamination - Insufficient or dirty engine oil can lead to inadequate lubrication, causing the turbocharger's bearings to wear out prematurely.

  • Excessive Heat - High temperatures, often caused by prolonged high-speed driving or towing heavy loads, can damage the turbocharger's components and lead to failure.

  • Foreign Object Damage - Debris or foreign objects entering the turbocharger can cause physical damage to the impeller blades and other internal components.

  • Turbo Lag and Overboost - Sudden changes in engine load or boost pressure can put excessive stress on the turbocharger, leading to mechanical failure.

  • Lack of Maintenance - Neglecting regular turbocharger maintenance, such as oil changes and inspections, can allow issues to go unnoticed and worsen over time.


By understanding these common causes of turbocharger failure, vehicle owners and mechanics can take proactive steps to prevent and address these issues, ensuring the longevity and performance of the turbocharger and the overall engine system.


Preventing Turbocharger Failure


To help prevent turbocharger failure, consider the following tips:



  • Maintain Proper Oil Level and Quality - Regularly check and change the engine oil according to the manufacturer's recommendations, using the recommended oil type and viscosity.

  • Avoid Excessive Heat and Load - Limit prolonged high-speed driving and towing heavy loads, which can generate excessive heat and stress on the turbocharger.

  • Inspect and Replace Air Filters - Ensure the air filters are clean and free of debris to prevent foreign objects from entering the turbocharger.

  • Monitor for Signs of Turbo Lag or Overboost - Address any issues with sudden changes in engine load or boost pressure to prevent mechanical failure.

  • Perform Regular Maintenance - Follow the manufacturer's recommended maintenance schedule for the turbocharger, including inspections, cleaning, and replacement of worn components.


By following these preventive measures, you can help extend the lifespan of your vehicle's turbocharger and maintain optimal engine performance.

How do I know if my turbo is blown?


The symptoms of a damaged or failing turbo are:

  • Loss of power.
  • Slower, louder acceleration.
  • Difficulty maintaining high speeds.
  • Blue/grey smoke coming from the exhaust.
  • Engine dashboard light is showing.



Can clogged air filter damage a turbo?


An example of a common problem is a clogged air filter, which does not pump enough air into the cylinder or allows dirt particles to get into certain parts. This can lead to a broken or damaged turbo and/or engine block. Air filters should therefore be replaced in good time.



How do I know if my turbo is clogged?


5 Common Signs of a Failing Turbocharger

  1. Excessive Exhaust Smoke. If you notice excessive exhaust smoke coming from your diesel, it's definitely time to take it to a mechanic.
  2. Poor Acceleration or Throttle Response.
  3. Loud Noises Upon Startup.
  4. Reduced Fuel Economy.
  5. Check Engine Light.



What is the most common cause of turbocharger failure?


Most failures are caused by the three 'turbo killers' of oil starvation, oil contamination and foreign object damage. More than 90% of turbocharger failures are caused oil related either by oil starvation or oil contamination. Blocked or leaking pipes or lack of priming on fitting usually causes oil starvation.



What causes a turbo to lose boost?


Possible causes of low boost pressure can be broken hoses, contamination build-up within the turbine or compressor areas, leaking seals, damaged shaft bearings, the wastegate sticking open or operating incorrectly, a leak in the intercooler, a blocked air filter, a damaged diesel particle filter, or a damaged catalytic ...



What damages a turbocharger?


Most failures are caused by the three 'turbo killers' of oil starvation, oil contamination and foreign object damage. More than 90% of turbocharger failures are caused oil related either by oil starvation or oil contamination. Blocked or leaking pipes or lack of priming on fitting usually causes oil starvation.



Can a turbo suddenly fail?


This reduction in performance can occur gradually or suddenly, depending on the severity of the turbo's issues. An increase in exhaust smoke is a tell-tale symptom of a failing turbo, with the smoke's colour indicating different problems. Blue Smoke suggests that oil is burning within the combustion chamber.



What is the life expectancy of a turbocharger?


Of course, the answer depends on how the truck is used, how the engine is maintained, and whether or not the engine is operating correctly, but a turbocharger on a diesel engine will usually last for at least 150,000 miles, but more often than not, the average turbo will still be functioning correctly at 200,000 miles, ...



What are most turbocharger failures caused by?


Turbo problems are caused by a variety of factors such as a lack of lubrication, oil contamination, usage outside of standard specifications, and regular wear and tear.



What destroys a turbo?


Most failures are caused by the three 'turbo killers' of oil starvation, oil contamination and foreign object damage. More than 90% of turbocharger failures are caused oil related either by oil starvation or oil contamination.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.