Turbocharger oil return line carbon
Remove line. Inspect and clean.
Excessive Drag In Turbocharger
Carbon build-up behind turbine
Inspect and clean. See Engine
Inspect and repair. See Engine
wheel caused by air intake leaks
Bearing seizure or dirty or worn
Check for plugged air filters. See
Engine Repair chapter.
temperature, unbalanced wheel, dirty
oil, oil starvation, or insufficient