A truck engine overheats during heavy load conditions but maintains normal temperature at idle. Technician A says a partially clogged radiator could cause this. Technician B says a slipping fan clutch could cause this. Who is right?

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Both A and B. Both conditions can cause the described overheating pattern. A partially clogged radiator cannot dissipate heat adequately under load, and a slipping fan clutch won't provide sufficient cooling airflow when needed most during heavy loads.

A truck engine overheats during heavy load conditions but maintains normal temperature at idle. Technician A says a partially clogged radiator could cause this. Technician B says a slipping fan clutch could cause this. Who is right?

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