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. What is most likely the problem?
A)The impeller could be slipping on the water pump shaft.
B)The impeller blades could be corroded.
C)The impeller could be slipping on the water pump shaft or the impeller blades could be corroded.
D)None of the answers is correct.

Question

Quizplus · Accepted Answer

The impeller slipping on the water pump shaft or the impeller blades being corroded can both lead to inadequate coolant circulation, causing overheating despite no leaks and a functioning thermostat.

Two Technicians Are Discussing a Vehicle with an Overheating Problem