This article introduces how to deal with black blue smoke coming out of the doosan DH220LC-V engine and oil leakage from the turbocharger and oil dipstick.

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1. Inspection essentials Inspection essentials are as follows: 

a. Remove the intake pipe and muffler from the turbocharger and check that the axial clearance and radial clearance of the turbocharger spindle are normal.

b. The fault phenomenon is analyzed as excessive pressure inside the crankcase causing oil to escape from the oil dipstick and turbocharger.   

c. Remove the lower exhaust pipe and breather, and find out that the cause of the fault is inside the engine. 

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d. When the engine was disassembled and inspected, it was found that the fifth generation was painfully worn and the fifth cylinder connecting rod was worn out. 

2. Reason: 

 Due to the eccentric wear of the piston due to the wear of the small tiles, the mixture in the cylinder enters the crankcase and causes the oil to escape from the oil dipstick and turbocharger.  

 3. Solution: Replace the damaged parts and it will be OK.

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