When the rear seal leaks, it allows hot exhaust gases from the turbine housing to enter the bearing housing Another way to identify the oil seal leaking is by letting the engine idle for a min or two and then pull away normally (engine under load) if seals are leaking there will be some blue/white smoke, which then clears This contamination can cause the oil to degrade rapidly, leading to sludging and coking
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Learn the symptoms of bad turbo seals, causes of failure, and tips for diagnosis, repair, and prevention to maintain turbocharger health.
Oil is very often overlooked as a critical component
Turbo / turbocharger oil leaks can be caused by a variety of factors which often originate around the correct pressure within the compressor and turbine housing. To put it short, the seals themselves rarely fail and the oil leaking from the turbocharger is just a symptom of another problem that is waiting to be fixed Here are some of the issues that could cause your turbo to leak oil:
