Sorry Evercool but we beg to differ.

[s10pao]

Depending on the alloy mix in the loop. If your engine block is iron and your rad aluminum by default, ground (stray voltages) or otherwise, the aluminum is the sacrificial anode.

Thanks for this information sir.

So in this case, is proper grounding of engine enough to prevent galvanic corrosion or is there a need to install a sacrificial anode?