cheetha94607

was told that i would have to switch my coolant for my aluminum heads and intake to make sure it wont have any corrosion. is this ture and if so what would i have to switch it to.

67mustang302

Just use regular antifreeze, but use distilled water, NOT tap water.

cheetha94607

can you explain why?

67mustang302

Iron block and aluminum heads, dissimilar metals with different mineral compositions generates electrical fields, regular tap water that's full of minerals/ions acts as a conducter from the differing metals and it generates electrical current which causes/speeds up corrosion. Distilled water does act as a conductor like tap water does, preventing/slowing corrosion. That's also why you need to add antifreeze, it acts as a corrosion inhibitor.

cheetha94607

ok but whataffects does the 70/30 or 50/50 mixture have? or do it make any differance

67mustang302

As far as corrosion, prolly not much. It does effect the temperature range of the coolant though.

cheetha94607

ok, thanks for all the info.