
Originally Posted by
elibinladin
These are some of the most common causes of turbo failure:
1. Hard driving immediately on startup - The engine has not built up enough oil pressure to properly lubricate the turbocharger.
2. Shutting of the engine immediately after driving - The turbo is extremely hot and still spinning with no oil to lubricate the bushings and dissipate the heat.
3. Lack of oil or dirty oil - Without oil, the entire engine will fail. Dirty oil will carry debris (metal slivers, carbon pieces) into the turbo bushings.
4. Shrapnel in the manifolds - Pieces of valves, rings, pistons and even coked oil will destroy the turbine and / or compressor wheels when contact is made at high RPM.
5. Pressurizing the turbocharger - A dirty air filter, clogged catalytic convertor or damaged exhaust system can cause a failure. An internally damaged engine will pressurize, preventing the oil from draining out of the turbocharger.