During this video we will be analysing what causes oil contamination, show you the signs of oil contamination and how you can prevent turbocharger failure caused by oil contamination. For more information, check out – [ Ссылка ].
Transcript
Hi, I’m Antony, I work here in Melett’s Technical team.
Welcome to our latest Turbo Tips Video – Oil Contamination – One of the main reasons why turbos fail.
What is oil contamination? Oil contamination is when the oil that flows through a turbocharger becomes contaminated.
Today’s video will highlight the causes, signs and preventions associated with Oil Contamination.
What causes Oil Contamination? We have picked out a few here but there are many more in our help guides.
One of the causes is poor quality or damaged oil filter.
Carbon build-up or swarf deposits from the engine
Carbon from the oil feed pipe
Or, blasting residue from the reman process
Damaged oil filter
Carbon build-up
Carbon from the Oil Feed Pipe
Blasting Residue
Here are the signs Oil Contamination leaves on the turbocharger shaft & wheel
If the oil is contaminated, score marks will be visible on the Journal Bearing landing areas – as you can see here
There are different levels of damage, here is an extreme case of Oil Contamination
Notice the damage to the Journal Bearing landing areas caused by Oil Contamination
Next, we would look at the Journal Bearing, focusing on the OD and ID checking for any signs of scoring.
On a free-floating Bearing, the OD and ID will be scored
On a fixed Bearing, usually, the ID will be scored
Damaged caused by Oil Contamination on a free-floating Journal Bearing
Here is an example of a Journal Bearing cut in half to show you the score marks inside the Journal Bearing
Signs of Oil Contamination can also be found on the Thrust Bearing, mainly on the ramping where most of the oil flows around the thrust set-up.
Let’s take a closer look at the scoring mark on the ramping area, this identifies the failure as Oil Contamination
There are different levels of the damaged caused by oil contamination, there is an extreme example.
Along with the Thrust Bearing the Thrust Flinger, Washer and Collar will show signs of Oil Contamination. Let’s look at these components individually.
Thrust Collar
Thrust Flinger
Thrust Washer
So, we have discussed the causes and looked at the signs, lets now discuss prevention. We have picked out a couple of examples, but for more information, check out our downloadable help guide on the website.
Check your engine for swarf deposits. Take care when changing the engine oil. Always use the recommended oil and oil filters. And, change or clean any oil feed pipes.
Helping you have a longer-lasting Turbocharger.
Check for swarf deposits
Take care when changing the engine oil
Use the recommended oil/filters
Clean the oil feed pipe
Melett Turbo Tip – Always diagnose the original cause of failure, if the original cause of failure was oil contamination and it does not get diagnosed correctly when you refit the turbocharger it will fail.
Thank you for watching and we will see you next time for another Melett turbo tip video.
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