Originally Posted by CooperMan
Surely the path of conductivity can also be the coolant water + antifreeze which has intimate contact with everything we're concerned about corroding, I once wondered about adding some Fernox as I've found this very effective in stopping internal corrosion in multi metal central heating systems

In essence I would agree Jon. However it seems the best galvanic protection in engines is to use de-ionised water and/or anti-freeze inhibitor as the coolant, which you probably already have. The former cannot act as an electrolyte as it doesn't conduct so important to top up only with that.

FWIW I'm so unconcerned I'm not even going to get out one of my multimeters wink


Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone