Technician A says white smoke in the exhaust of a diesel engine can be the result of a cylinder misfire in a warm engine. Technician B says blue smoke in the exhaust of a diesel engine can be caused by scored cylinder walls. Who is correct?

Question

Quizplus · Accepted Answer

White smoke in the exhaust of a diesel engine can indicate incomplete combustion, which can occur with a cylinder misfire. Blue smoke suggests oil burning in the combustion chamber, which can happen with scored cylinder walls or worn valve seals, making both Technician A and B correct.

Technician a Says White Smoke in the Exhaust of a Diesel