I recently installed a brand new DBB T67 (garret) turbo on a 2jz. I am running a -4AN feed line with a .030 restrictor in the oil inlet, the drain is -10AN with a 45* off the bottom of the turbo and a 45* on the block. There is no kinks or sharp bends in the drain line. Now once the car is warmed up is starts smoking on decel and right after you rev it. I pulled the turbo off, and sure enough it was leaking out the turbine seal, and the housing and turbine were covered in oil. I sent the turbo in to get repaired, they said it was fine, but replaced the seal anyways. Now I reinstalled the turbo and it is still smoking, however less than before. I was told that it is an oil feed or drain problem....now I am using the same feed/ drain that I have put on many other JZ's without any problems. Any ideas on what the problem could be?
