Turbocharger Trouble Shooting: Symptoms/Causes
To trouble shoot following symptoms, refer to appropriate number under PROBABLE CAUSES.
SYMPTOM TO PROBABLE CAUSES (1)
| Symptom | Check Probable Causes | ||
|---|---|---|---|
| ENGINE LACKS POWER | No. 1, 3, 4, 6-11 and 16-20 | ||
| BLACK SMOKE | No. 2-4, 6-11 and 16-20 | ||
| BLUE SMOKE | No. 2, 6-8, 13-15 and 17-20 | ||
| EXCESSIVE OIL CONSUMPTION | No. 2, 6-8, 13-15 and 17-20 | ||
| NOISY OPERATION | No. 1-8, 11-12 and 19-20 | ||
| CYCLIC SOUND FROM TURBOCHARGER | No. 2, 19 and 20 | ||
| OIL LEAK AT TURBINE SEAL | No. 13-15 and 17-20 | ||
| OIL LEAK AT COMPRESSOR SEAL | No. 2, 8-11, 13-15 and 17-20 | ||
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PROBABLE CAUSES
| Cause No. | Cause |
|---|---|
| 1 | Clogged air filter element. |
| 2 | Obstructed air intake duct to turbo compressor. |
| 3 | Obstructed air outlet duct from compressor to intake manifold. |
| 4 | Obstructed intake manifold. |
| 5 | Air leak in duct from air cleaner to compressor. |
| 6 | Air leak in duct from compressor to intake manifold. |
| 7 | Air leak at intake manifold-to-engine joint. |
| 8 | Obstruction in exhaust manifold. |
| 9 | Obstruction in exhaust system. |
| 10 | Gas leak in exhaust manifold-to-engine joint. |
| 11 | Gas leak in turbine inlet-to-exhaust manifold joint. |
| 12 | Gas leak in ducts after turbine outlet. |
| 13 | Obstructed turbocharger oil drain line. |
| 14 | Obstructed engine crankcase ventilation. |
| 15 | Turbocharger center housing sludged or coked. |
| 16 | Engine camshaft timing incorrect. |
| 17 | Worn engine piston rings or liners (blow-by). |
| 18 | Internal engine problems (valves, pistons). |
| 19 | Dirt caked on compressor wheel and/or diffused vanes. |
| 20 | Damaged turbocharger. |