Examples of failed components
Turbine wheel and shaft failed from lack of lubrication, notice how the shaft has turned blue
Foreign object / scrub damage to compressor wheel
Engine Lacks Power | Black Exhaust Smoke | Excessive Engine Oil Consumption | Blue Exhaust Smoke | Turbo Noisy | Cyclic sound from turbo | Oil Leak from compressor seal | Oil Leak from turbine seal | Cause | Remedy |
* | * | * | * | * | Clogged air filter | Replace air filter | |||
* | * | * | * | * | * | Obstructed air intake to turbo | Remove Obstruction | ||
* | * | * | Obstructed air outlet duct from compressor to intake manifold | Remove Obstruction | |||||
* | * | * | Obstructed intake | Remove Obstruction | |||||
* | Air leak in duct from air cleaner to compressor | Replace seals or tighten fasteners | |||||||
* | * | * | * | * | Air leak in duct from compressor to intake manifold | Replace seals or tighten fasteners | |||
* | * | * | * | * | Air leak at intake manifold to engine joint | Replace seals or tighten fasteners | |||
* | * | * | * | * | * | Obstruction in exhaust manifold | Remove Obstruction | ||
* | * | * | Obstruction in muffler or exhaust stack | Remove Obstruction | |||||
* | * | * | * | Gas leak in exhaust manifold to engine joint | Replace seals or tighten fasteners | ||||
* | * | * | * | Gas leak in turbine inlet to exhaust manifold joint | Replace seals or tighten fasteners | ||||
* | Gas leak in ducting after turbine outlet | Repair gas leak | |||||||
* | * | * | * | Obstructed turbo oil drain line | Remove obstruction or replace oil drain line | ||||
* | * | * | * | Obstructed engine crankcase vent | Clear obstruction | ||||
* | * | * | * | Turbo center housing sledged or coked | Change engine oil, filter, replace turbo as required | ||||
* | * | Fuel injection pump or injectors incorrectly adjusted | Replace or adjust injectors and/or injection pump | ||||||
* | * | Engine camshaft timing incorrect | Check/reset timing | ||||||
* | * | * | * | * | * | Worn engine rings or liners (blowby) | Repair as needed | ||
* | * | * | * | * | * | Internal engine problem (valves, pistons) | Repair as needed | ||
* | * | * | * | * | * | * | * | Dirt caked on compressor wheel | Clean with non caustic cleaner and soft brush, change filters |
* | * | * | * | * | * | * | * | Damaged turbo | Analyze turbo to determine failure, replace turbo |