This happens when oil seeps past the turbocharger seals and mixes with the compressed air flowing to the intercooler. Searching the forum, googling and youtube came back with Discover why turbo leaking oil into intercooler occurs
Turbo Leaking Oil into Intercooler: Quick Fixes!
Learn repair steps, maintenance advice, and how to prevent future leaks.
This is considered the cold side, where the turbo is pressurizing the air from the intake
Turbo seals are allowing oil to pass from the chra or center section where the bearings wheel the housing Basically this happens if you push the turbo too hard and cause the shaft to move thus compromising the oil seal Or the turbo is old. If you’ve noticed oil in your intercooler, you’re facing a common but serious issue for turbocharged engines
This guide will help you understand why your turbo is leaking oil, what it means for your engine, and how to fix it. The turbo is sitting on my workbench waiting to be taken to bits and rebuilt I am removing the intercoolers to clean out the oil as well, and have changed the oil filter on this car (had to drain the oil, might as well do a much needed oil change) After every drive, the following morning, i come out to see a couple drops of oil on the drive way directly under my tdi's intercooler
