What does blue smoke from Man Engine mean?
- JJulie FarmerSep 10, 2025
Blue smoke from a Man Engine can indicate that lube oil is penetrating into the combustion chamber due to worn or broken pistons/piston rings, which requires remedy from manufacturer service. Other potential causes include a turbine and compressor impeller in the turbocharger that is dirty (rough running, out of balance), or a worn valve stem/guide.