Oil leaking from downpipe/o2 housing

**Shane@DBPerformance** · 06-23-2005

Bad return lines can cause that to happen. You won't see it much on DSMs, since a lot of people use hard return lines and your choice of return location is already setup. On other cars though, you always see people putting the return location on the pan below the oil level or having a crimped rubber oil return line or one that drops down too far and comes back up. When the return line is bad, oil can't return to the pan quick enough(it isn't under pressure on the return, gravity has to do all the work), so oil starts backing up in the center cartridge. If you let it do that for too long, then the seal will blow for good.

mnturbo · 06-23-2005

Yeah thats what happened.

I am kinda worried I may have damaged the new turbo seals, anyway to know for sure?

mnturbo · 06-24-2005

Well I took it for a spin this am and I can already tell this thing pulls like mad even at 15 psi.
Well it still smokes like crazy, expecially under boost.
The car only ran for like 30 seconds withe the return line bent could this have hurt the seal?
Could it just be all the oil accumulated in the turbo is burning out the exhaust??