Vehicle: 2007 Chevrolet Aveo, L4-1.6L,
Problem: The vehicle was brought to the
shop because it was overheating only on short trips around town.
It was fine on the freeway. The shop replaced the thermostat,
radiator and coolant. The cooling fans were operating correctly.
After all the repairs, the engine was still overheating.
Details: The Tech-Assist consultant advised the
tech to feel the lower radiator hose with the engine fully warmed
up. The hose was still cool. Next, the consultant advised
checking water pump flow by removing a heater hose (on the engine
side of the heater core) with the engine idling. Only a trickle
of coolant came out. Based on that those results, the
consultant recommended inspecting the water pump. The tech
removed the water pump and found that the impeller was spinning
on the shaft.
Confirmed Repair: The tech replaced the
water pump and the issue was resolved.