Engine lacks power |
Black exhaust smoke |
Excessive engine oil consumption |
Blue exhaust smoke |
Noisy turbo |
Cyclic sound from turbo |
Oil leak from compressor seal |
Oil leak from turbo seal |
Cause |
X |
X |
X |
X |
|
|
X |
|
Clogged air filter element |
|
X |
X |
X |
X |
X |
X |
|
Obstructed air intake duct to turbo compressor |
X |
X |
|
|
X |
|
|
|
Obstructed air outlet duct from compressor to intake manifold |
X |
X |
|
|
X |
|
|
|
Obstructed intake manifold |
|
|
|
|
X |
|
|
|
Air leak in duct from air cleaner to compressor |
X |
X |
X |
X |
X |
|
|
|
Air leak in duct from compressor to intake manifold |
X |
X |
X |
X |
X |
|
|
|
Air leak at intake manifold to engine joint |
X |
X |
X |
X |
X |
|
X |
|
Obstruction in exhaust manifold |
X |
X |
|
|
|
|
X |
|
Obstruction in exhaust system |
X |
X |
|
|
X |
|
X |
|
Gas leak in exhausr manifold to engine joint |
X |
X |
|
|
X |
|
X |
|
Gas leak in turbine inlet to exhaust manifold joint |
|
|
|
|
X |
|
|
|
Gas leak in ducting after the turbine outlet |
|
|
X |
X |
|
|
X |
X |
Obstructed turbo oil drain line |
|
|
X |
X |
|
|
X |
X |
Obstructed engine crankcase vent |
|
X |
X |
|
|
|
X |
X |
Turbo center housing sludged or coked |
X |
X |
|
|
|
|
|
|
Fuel injection pump or fuel injectors incorrectly adjusted |
X |
X |
|
|
|
|
|
|
Engine camshaft timing incorrect |
X |
X |
X |
X |
|
|
X |
X |
Worn engine piston rings or liners (blowby) |
X |
X |
X |
X |
|
|
X |
X |
Internal engine problem (valves, pistons) |
X |
X |
X |
X |
X |
X |
X |
X |
Dirt caked on compressor wheel and/or diffuser vanes |
X |
X |
X |
X |
X |
X |
X |
X |
Damaged turbo |