with both sides considered, i have to agree with mr myers. one fact keeps jumping out at me - the core is only attached to rubber hoses on one end, and a plastic box, which ranger 5.0 outlined the non conductive nature. if a piece of metal completely isolated from other metal is in a fluid transfer loop, how would it be affected my electrolysis? know this tek, i'm not being cocky, i just don't understand; if i/we are wrong, please enlighten us all, as we are probably all here to learn, yes? IMHO, i think electrolysis would be a problem if there was current being released into the coolant - which i question the conductive properties, or if you had metal lines to connect all cores rads, pumps, and water jackets. while grounding the core couldn't hurt, i don't understand how it would help.
bottom line, i don't think i need to ground my core, as the topic starter, i had an issue, took it to a shop, and now it is way resolved.
current can be released into the coolant when spark plug spark grounds to the block and there is coolant inside the block traveling through the coolant lines and into the heater core just a theory but could be possible
Or you could simply add the coolant treatment that Ford (actually Navistar) recommends to stop the electrolysis in Powerstrokes.
I too have done some research after spouting off as I did and even though I didn't find either of the articles you guys found I did come across an article from Cummins concerning this and after readin I remember when I had road trucks that the water filter was a change item when oil was changed just to keep a fresh supply of the scca chemical in the water/coolant. Form what I read here if you monitor the Ph level and it can be controlled by additives then it would be effective for the whole system and not just the heater.
88 BII,4.0, 9"& D44/4.88 locked. 1350/1354 doubles
92 XJ-wifes toy