Technician A says the engine should idle for 20 to 120 seconds after a hard run to allow the turbocharger shaft to cool. Technician B says if the vehicle has not been driven for a few days, start the engine up and run it at 2,000 to 2,500 rpm to flush the old oil out of the turbocharger bearings and oil lines. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Technician A says the engine should idle for 20 to 120 seconds after a hard run to allow the  turbocharger shaft to cool. Technician B says if the vehicle has not been driven for a few days, start the engine up and run it at 2,000 to 2,500 rpm to flush the old oil out of the turbocharger bearings and oil lines. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Quizplus · Accepted Answer

Technician A is correct because allowing the engine to idle after a hard run helps to cool down the turbocharger gradually, preventing oil coking and damage to the turbocharger bearings. Technician B's advice is not a standard practice for turbocharged engines and could potentially cause harm rather than prevent it.

Technician a Says the Engine Should Idle for 20 to 120