IF UR TURBO IS LEAKING OIL U WOULD SEE IT COMING FROM TTHE BOLTS OF THE EXHAUST HOUSING, OR THE FLANGE/FITTING FOR UR OIL DRAIN OR SUPPLY. IF THERES OIL OR THE SUPPLY OR DRIAN FITTINGS, CLEAN THOSE REALLY GOOD AND START UR CAR AND WATCH FOR LEAKS. BUT IF A TURBO NEEDS TO BE REBUILT IT WOULD SMOKE LIEK CRAZY OUT OF THE EXHAUST (MUFFLER).