Alum intake corrosion ( prevention)

daliant said
A sacrificial anode in the radiator will only protect the radiator unless it is bonded to the rest of the system with a connecting wire, the hoses act like an insulator. If you want to protect the intake the anode needs to be in the intake.

Radiator and engine are both grounded to the body. They are therefore electrically connected through the body sheetmetal structure.