Doosan engine emitting black and blue smoke, oil leaking from the turbocharger and oil dipstick - Solution

Doosan engine emitting black and blue smoke, oil leaking from the turbocharger and oil dipstick - Solution 

 

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Applicable Model: DH220LC-V Engine emitting black and blue smoke, oil leaking from the turbocharger and oil dipstick Symptom

 1. Inspection Guidelines: 1. Remove the intake manifold and muffler from the turbocharger and check the axial and radial clearances of the turbocharger spindle. Both are normal. 

2. Based on the symptoms, excessive pressure inside the crankcase is causing oil to leak from the oil dipstick and turbocharger. 

3. Removing the lower exhaust pipe and breather does not resolve the issue, indicating the cause is internal to the engine. 

4. Engine inspection revealed uneven wear on the fifth cylinder piston and worn connecting rod bearing. 

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 2. Cause:

 Due to the worn bearing, uneven piston wear allows the air-fuel mixture to enter the crankcase, causing oil to leak from the oil dipstick and turbocharger. 

 

 3. Solution: 

Replace the damaged part and it will be OK.

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