Home ENGINEERING Turbocharger Oil Leak Turbo Leak Causes

Turbocharger Oil Leak Turbo Leak Causes


Learn what causes a turbo oil leak. Watch this video if you have a turbo leaking oil from exhaust or a turbo leaking oil into intercooler. Learn what a turbo seal leak is and how to find how to diagnosis the cause. This video covers the main reasons why a turbocharger may leak.

source/image(PrtSc): DieselPowerSource

Turbochargers can spin at over 240,000 rpm and endure temperatures of 950°C. The turbo relies on the thin film of oil that lubricates the bearings on the turbine shaft. This oil is kept in place by seals for the turbine and compressor ends of the bearing housing. Watch the video from DieselPowerSource for more info:

These seals are unlike conventional oil seals, and similar to piston rings. They need positive air pressure inside the compressor and turbine to keep oil lubricating the bearings and prevent it seeping into the end housings. A restriction on the inlet side will create a vacuum that will pull oil past the seals at the compressor end housing.


If the engine idles for long periods, the turbo will rotate at very low speed with correspondingly low air pressure. The resulting vacuum will cause oil to seep into the turbine housing. Either situation results in insufficient oil for the turbine bearings.via/read more: partinfo

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