C A U T I ON
Never use caustic cleaning solution for cleaning. Do not use wire brush or steel blade
scraper to clean parts. Such cleaning will damage finished surfaces of turbocharger.
Before cleaning, inspect parts for signs of burning, rubbing, or other damage which
might not be evident after cleaning.
Insure compressor and turbine wheel blades are thoroughly clean. Deposits left on
blades will affect balance of rotating assembly.
(1) Soak all parts in cleaning solvent for 25 minutes. After soaking, use a stiff bristle brush to
remove all dirt particles. Using compressed air, dry all parts thoroughly.
(2) Clean all internal cavities and oil passages in center housing thoroughly with compressed
(3) Clean oil passage in center housing thrust plate with compressed air.
When polishing surfaces, use silicone carbide abrasive cloth for aluminum parts and
crocus cloth for steel parts.
(4) Minor surface damage may be burnished or polished away.
(1) Inspect all parts for signs of damage, corrosion, or deterioration. Check for nicked, crossed,
or stripped threads.
(2) Check turbine wheel for nicks, rubbing, and wear.
(3) Inspect shaft for signs of scoring, scratches, or bearing seizure.
(4) Check compressor wheel for signs of rubbing or blade damage. Check to see wheel bore is
(5) Inspect seal parts for signs of rubbing or scoring of running faces.
(6) Inspect backplate for wear or damaged bore.
(7) Inspect center housing for contact with rotating parts.