replaced the oil feed line on my 2000 QTS today, along with the radiator, and some PCV bits and pieces that I noticed during the install of the new pipe.
When pipe had been fitted, I turned over the engine to make sure oil and coolant found its way to the turbo, then started her up, engine seemed fine for a few minutes, then suddenly the engine speed dropped for a few seconds and started again (almost like pressure had been released) and a small amount of smoke started coming from the turbo area. I turned off the engine to find that the oil feed pipe was leaking oil and a clear liquid ,coolant? around the bolt-fittings on the top of the turbo.
Could the pipe have an oil-airlock, or are the bolts just not tight enough, I tightened the bolts as tight as I could get them and the oil feed pipe was a direct replacement from AUDI.
looked under the car and oil was collecting in the drip-tray, I would say its lost about 2 tablespoons of oil.
I am REALLY worried that this has damaged the turbo as is an almost brand new K04-15!
The car was smoking really slightly before the oil leak, but pretty sure this is normal as it had been sitting for weeks.
I am just slightly unsure about airlocks and how they work, I left the filler cap off the coolant once freshly topped up and assumed that this would get rid of any air locks, not so sure about the oil system!!
would appreciate if anyone has any experience with this!