Two technicians are discussing a vehicle with an overheating problem. There are no leaks, internal or external. The belts are in good condition, and the radiator has been removed and flow tested. Everything appears to be in good condition. A new thermostat was installed, but it did not cure the problem. Technician A says the impeller could be slipping on the water pump shaft. Technician B says the impeller blades could be corroded. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Question

Quizplus · Accepted Answer

Both technicians could be correct. Technician A suggests that the impeller could be slipping on the water pump shaft, which would prevent proper coolant circulation. Technician B suggests that the impeller blades could be corroded, which would also reduce the efficiency of the water pump. Both conditions could lead to overheating.

Two Technicians Are Discussing a Vehicle with an Overheating Problem