Sprinter 315 2010 twin turbo - big turbo still leaking oil despite new rebuild


New member
I have recently bought a Sprinter 315 2010 luton van. It had a blown turbo. When I checked both impellers were bad and so I proceeded to order cartridges from ebay nerings in latvia. I have rebuilt turbos before successfully usually found it to be a straight forward process. I cleaned the intercooler and exhaust cat and all the hoses.
I then rebuilt both cartridges with the turbo removed. Everything started fine and expected there to be smoke which there was. I took it for a half mile drive around the block. However the smoke didn't stop when expected. I removed the catalytic converter and saw that the exhaust side of the turbo was wet with oil. Looks like more oil is coming through and the problem is not cured. The new turbo impellers are fine so don't expect that they're bad already.
Can anyone possibly help with what might be happening? I checked the oil drain pipes and they were clean... ?

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