Re: Turbo failure.. What happened? (Pics)
The "scratches" in the first photo are the results of the deburring process after the backing plate comes out of the diecast mold. Somebody breaks the sharp edge with some form of rotary tool.
The backside of the wheel, could use a better picture, but the "gash" at the 12 o'clock area ...from 10 to 2...is part of the process used to balance the wheel. It's been milled radially a bit. Looks like, again, a rotary scotchbrite wheel was used to buff an area.
'01 F250 4x4 Crew Shorty, PM Rods, PIS 160/30's , Hydra, WW2, Monster Box, MBRP 4" 409 SSTL Exhaust, Firestone Ride-Rights, Regulated fuel return, Ford AIS.